Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 24 of 24
Full-Text Articles in Physical Sciences and Mathematics
Ambient Synthesis Of One-/Two-Dimensional Cuagse Ternary Nanotubes As Counter Electrodes Of Quantum-Dot-Sensitized Solar Cells, Xin Qi Chen, Yang Bai, Zhen Li, Lian Zhou Wang, S X. Dou
Ambient Synthesis Of One-/Two-Dimensional Cuagse Ternary Nanotubes As Counter Electrodes Of Quantum-Dot-Sensitized Solar Cells, Xin Qi Chen, Yang Bai, Zhen Li, Lian Zhou Wang, S X. Dou
Australian Institute for Innovative Materials - Papers
2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. One-/two-dimensional ternary CuAgSe nanotubes (NTs) were successfully prepared from copper selenide (Cu2-xSe) NTs at room temperature within a short reaction time by the facile cation-exchange approach. Cation exchange leads to the transformation of the crystal structure from cubic into orthorhombic and/or tetragonal with good retention of morphology. The exchange reactions are spontaneous owing to large negative changes of the Gibbs free energy. The effects of parameters such as reaction time, precursor source, and precursor ratio on the exchange reaction were investigated. The resultant CuAgSe NTs were explored as counter electrodes (CEs) of …
A Bi-Layer Tio2 Photoanode For Highly Durable, Flexible Dye-Sensitized Solar Cells, Jianjian Lin, Yong Peng, Alexander Pascoe, Fuzhi Huang, Yi-Bing Cheng, Yoon-Uk Heo, Andrew Nattestad, Wanchul Seung, Sung Kyun Kim, Hoon Joon Yoon, Sang Woo Kim, Yusuke Yamauchi, S X. Dou, Jung Ho Kim
A Bi-Layer Tio2 Photoanode For Highly Durable, Flexible Dye-Sensitized Solar Cells, Jianjian Lin, Yong Peng, Alexander Pascoe, Fuzhi Huang, Yi-Bing Cheng, Yoon-Uk Heo, Andrew Nattestad, Wanchul Seung, Sung Kyun Kim, Hoon Joon Yoon, Sang Woo Kim, Yusuke Yamauchi, S X. Dou, Jung Ho Kim
Australian Institute for Innovative Materials - Papers
Low-temperature processing of dye-sensitized solar cells (DSCs) [B. Oregan, M. Grätzel, Nature, 1991, 353, 737] is crucial to enable their commercialization with low-cost plastic substrates. Much of the previous work in this area has focused on mechanical compression of premade particles on plastic substrates; however, many reported that this technique did not yield sufficient interconnections for high charge carrier transport. Herein, we present bi-layer photoanodes that incorporate microstructured TiO2 sea-urchin-like assemblies, composed of high-aspect-ratio single crystalline nanoribbons, i.e., two-dimensional subunits, which were deposited onto a nanoparticle layer (commercial P25), with a 5.6% conversion efficiency realized. We demonstrate that …
Enhanced Electron Lifetime Of Cdse/Cds Quantum Dot (Qd) Sensitized Solar Cells Using Znse Core-Shell Structure With Efficient Regeneration Of Quantum Dots, Rasin K. Ahmed, Long Zhao, Attila J. Mozer, Geoffrey D. Will, John M. Bell, Hongxia Wang
Enhanced Electron Lifetime Of Cdse/Cds Quantum Dot (Qd) Sensitized Solar Cells Using Znse Core-Shell Structure With Efficient Regeneration Of Quantum Dots, Rasin K. Ahmed, Long Zhao, Attila J. Mozer, Geoffrey D. Will, John M. Bell, Hongxia Wang
Australian Institute for Innovative Materials - Papers
Research on development of efficient passivation materials for high performance and stable quantum dot sensitized solar cells (QDSCs) is highly important. While ZnS is one of the most widely used passivation material in QDSCs, an alternative material based on ZnSe which was deposited on CdS/CdSe/TiO2 photoanode to form a semi-core/shell structure has been found to be more efficient in terms of reducing electron recombination in QDSCs in this work. It has been found that the solar cell efficiency was improved from 1.86% for ZnSe0 (without coating) to 3.99% using 2 layers of ZnSe coating (ZnSe2) deposited by successive ionic …
A Decaheme Cytochrome As A Molecular Electron Conduit In Dye-Sensitized Photoanodes, Ee Taek Hwang, Khizar Sheikh, Katherine L. Orchard, Daisuke Hojo, Valentin Radu, Chong-Yong Lee, Emma Ainsworth, Colin Lockwood, Manuela A. Gross, Tadafumi Adschiri, Erwin Reisner, Julea N. Butt, Lars J. C Jeuken
A Decaheme Cytochrome As A Molecular Electron Conduit In Dye-Sensitized Photoanodes, Ee Taek Hwang, Khizar Sheikh, Katherine L. Orchard, Daisuke Hojo, Valentin Radu, Chong-Yong Lee, Emma Ainsworth, Colin Lockwood, Manuela A. Gross, Tadafumi Adschiri, Erwin Reisner, Julea N. Butt, Lars J. C Jeuken
Australian Institute for Innovative Materials - Papers
In nature, charge recombination in light-harvesting reaction centers is minimized by efficient charge separation. Here, it is aimed to mimic this by coupling dye-sensitized TiO2 nanocrystals to a decaheme protein, MtrC from Shewanella oneidensis MR-1, where the 10 hemes of MtrC form a ≈7-nm-long molecular wire between the TiO2 and the underlying electrode. The system is assembled by forming a densely packed MtrC film on an ultra-flat gold electrode, followed by the adsorption of approximately 7 nm TiO2 nanocrystals that are modified with a phosphonated bipyridine Ru(II) dye (RuP). The step-by-step construction of the MtrC/TiO2 system is monitored with (photo)electrochemistry, …
A Versatile Binder-Free Tio2 Paste For Dye-Sensitized Solar Cells, Jeremy H. Yune, Inna Karatchevtseva, P Evans, Klaudia K. Wagner, Matthew J. Griffith, David L. Officer, Gerry Triani
A Versatile Binder-Free Tio2 Paste For Dye-Sensitized Solar Cells, Jeremy H. Yune, Inna Karatchevtseva, P Evans, Klaudia K. Wagner, Matthew J. Griffith, David L. Officer, Gerry Triani
Australian Institute for Innovative Materials - Papers
In this study, binder-free TiO2 colloidal pastes have been prepared using a variety of heterocyclic bases with diverse characteristics to produce robust photoanodes for dye-sensitized solar cells (DSSC) from a single cast film thickness of 5 micron. The influence of the base on the electrode structure and film morphology, including its electron donor characteristics are investigated after low temperature thermal treatment and high temperature sintering. The results show that quinoline in the TiO2 paste is retained within the electrode structure in comparison to piperidine and pyridine after a short thermal treatment of 150 °C for 15 minutes. The …
Enhanced Electron Lifetimes In Dye-Sensitized Solar Cells Using A Di-Chromophoric Porphyrin: The Utility Of Inter-Molecular Forces, Long Zhao, Pawel W. Wagner, Holly Van Der Salm, Keith C. Gordon, Shogo Mori, Attila J. Mozer
Enhanced Electron Lifetimes In Dye-Sensitized Solar Cells Using A Di-Chromophoric Porphyrin: The Utility Of Inter-Molecular Forces, Long Zhao, Pawel W. Wagner, Holly Van Der Salm, Keith C. Gordon, Shogo Mori, Attila J. Mozer
Australian Institute for Innovative Materials - Papers
Electron lifetimes in dye-sensitized solar cells employing a porphyrin dye, an organic dye, a 1:1 mixture of the two dyes and a di-chromophoric dye design consisting of the two dyes using a non-conjugated linker were measured, suggesting that the dispersion force of the organic dyes has a significant detrimental effect on the electron lifetime and that the di-chromophoric design can be utilized to control the effect of the dispersion force.
Mesoporous Hierarchical Anatase For Dye-Sensitized Solar Cells Achieving Over 10% Conversion Efficiency, Jianjian Lin, Yoon-Uk Heo, Andrew Nattestad, Yusuke Yamauchi, S X. Dou, Jung Ho Kim
Mesoporous Hierarchical Anatase For Dye-Sensitized Solar Cells Achieving Over 10% Conversion Efficiency, Jianjian Lin, Yoon-Uk Heo, Andrew Nattestad, Yusuke Yamauchi, S X. Dou, Jung Ho Kim
Australian Institute for Innovative Materials - Papers
Interest in both one-dimensional and hierarchical architectures of metal oxide semiconductors has intensified within the field of materials science over recent years. Herein, a new mesoporous anatase TiO2 architecture that combines these two concepts, as it is composed of individual, high-aspect-ratio, nanoribbon-like components, was synthesized via a facile hydrothermal method without any surfactant or template. An 8.3% solar-to-electric conversion efficiency was obtained when these structures were used in photoanodes for dye-sensitized solar cells, which are superior to commercial state-of-the-art TiO2 (6.6%), due to enhanced dye loading and efficient light scattering. To further improve the light scattering effect, a …
N719- And D149-Sensitized 3d Hierarchical Rutile Tio2 Solar Cells - A Comparative Study, Jianjian Lin, Yoon-Uk Heo, Andrew Nattestad, Mohammed Shahabuddin, Yusuke Yamauchi, Jung Ho Kim
N719- And D149-Sensitized 3d Hierarchical Rutile Tio2 Solar Cells - A Comparative Study, Jianjian Lin, Yoon-Uk Heo, Andrew Nattestad, Mohammed Shahabuddin, Yusuke Yamauchi, Jung Ho Kim
Australian Institute for Innovative Materials - Papers
Poor dye loading on rutile TiO2 is one of the chief reasons for lower solar-to-electric conversion efficiency (η) in dye-sensitized solar cells (DSCs), compared to their anatase based counterparts. Previously, we showed that similar light harvesting for both rutile and anatase was realized by using a metal-free organic indoline dye, D149 [Sci. Rep., 2014, 4, 5769]. This was in contrast to the bulk of previous studies, which employed ruthenium based N719, leading to significant differences in light harvesting. To date, there has been no report directly comparing N719 and D149 for rutile based DSCs. In this work, three-dimensional hierarchical …
Boosting The Efficiency Of Quantum Dot Sensitized Solar Cells Up To 7.11% Through Simultaneous Engineering Of Photocathode And Photoanode, Yang Bai, Chao Han, Xinqi Chen, Hua Yu, Xu Zong, Zhen Li, Lianzhou Wang
Boosting The Efficiency Of Quantum Dot Sensitized Solar Cells Up To 7.11% Through Simultaneous Engineering Of Photocathode And Photoanode, Yang Bai, Chao Han, Xinqi Chen, Hua Yu, Xu Zong, Zhen Li, Lianzhou Wang
Australian Institute for Innovative Materials - Papers
We demonstrate a new strategy of boosting the efficiency of quantum dot sensitized solar cells (QDSSCs) by engineering the photocathode and photoanode simultaneously. Nanostructured photocathodes based on non-stoichiometric Cu2-xSe electrocatalysts were developed via a simple and scalable approach for CdS/CdSe QDs co-sensitized solar cells. Compared to Cu2S CE, remarkably improved photovoltaic performance was achieved for QDSSCs with Cu2-xSe CEs. The superior catalytic activity and electrical conductivity of Cu2-xSe CEs were verified by the electrochemical impedance spectra and Tafel-polarization measurements. To maximize the efficiency enhancement, the photoanodes were optimized by introducing a pillared …
A Dye-Sensitized Visible Light Photocatalyst-Bi24o31cl10, Liang Wang, Jun Shang, Weichang Hao, Shiqi Jiang, Shiheng Huang, Tianmin Wang, Ziqi Sun, Yi Du, S X. Dou, Tengfeng Xie, Dejun Wang, Jiaou Wang
A Dye-Sensitized Visible Light Photocatalyst-Bi24o31cl10, Liang Wang, Jun Shang, Weichang Hao, Shiqi Jiang, Shiheng Huang, Tianmin Wang, Ziqi Sun, Yi Du, S X. Dou, Tengfeng Xie, Dejun Wang, Jiaou Wang
Australian Institute for Innovative Materials - Papers
The p-block semiconductors are regarded as a new family of visible-light photocatalysts because of their dispersive and anisotropic band structures as well as high chemical stability. The bismuth oxide halides belong to this family and have band structures and dispersion relations that can be engineered by modulating the stoichiometry of the halogen elements. Herein, we have developed a new visible-light photocatalyst Bi24O31Cl10 by band engineering, which shows high dye-sensitized photocatalytic activity. Density functional theory calculations reveal that the p-block elements determine the nature of the dispersive electronic structures and narrow band gap in Bi24O31Cl10. Bi24O31Cl10 exhibits excellent visible-light photocatalytic activity …
Highly Connected Hierarchical Textured Tio2 Spheres As Photoanodes For Dye-Sensitized Solar Cells, Jianjian Lin, Andrew Nattestad, Hua Yu, Yang Bai, Lianzhou Wang, S X. Dou, Jung Ho Kim
Highly Connected Hierarchical Textured Tio2 Spheres As Photoanodes For Dye-Sensitized Solar Cells, Jianjian Lin, Andrew Nattestad, Hua Yu, Yang Bai, Lianzhou Wang, S X. Dou, Jung Ho Kim
Australian Institute for Innovative Materials - Papers
We present a new type of microstructured TiO2 sea urchin-like assembly, composed of high aspect-ratio nanosheets. We also demonstrate the applicability of these structures as photoanodes in dye-sensitized solar cells, with 9.0% conversion efficiency realized, a considerable improvement over the commercial Dyesol paste (8.2%) under the same conditions. We reveal that this new TiO2 nanostructure is beneficial to enhanced dye loading and efficient light scattering. In particular, the interpenetrating individual sheets of the spheres result in more intimate interparticle connections and provide efficient electron transfer pathways.
Enhanced Performance Of Dye-Sensitized Solar Cells Using Carbazole-Substituted Di-Chromophoric Porphyrin Dyes, Long Zhao, Pawel Wagner, Anastasia Elliott, Matthew Griffith, Tracey M. Clarke, Keith C. Gordon, Shogo Mori, Attila Mozer
Enhanced Performance Of Dye-Sensitized Solar Cells Using Carbazole-Substituted Di-Chromophoric Porphyrin Dyes, Long Zhao, Pawel Wagner, Anastasia Elliott, Matthew Griffith, Tracey M. Clarke, Keith C. Gordon, Shogo Mori, Attila Mozer
Australian Institute for Innovative Materials - Papers
The purpose of this work is to investigate the origin of improved photovoltaic performance of a series of di-chromophoric carbazole-substituted porphyrin dyes employed as sensitizers in dye-sensitized solar cells. Five di-chromophoric zinc porphyrin dyes with the same porphyrin core, a carbazole unit attached in the meso-position through a phenylethenyl linkage, and substituents spanning a range of electron affinities, in an attempt to tune the electronic level of the carbazole unit, have been synthesized (CZPs). Density functional theory (DFT) calculations predicted the nature of the electronic transitions observed in the CZP systems, showing a large degree of orbital mixing. In contrast, …
Integrating A Triplet-Triplet Annihilation Up-Conversion System To Enhance Dye-Sensitized Solar Cell Response To Sub-Bandgap Light, Andrew Nattestad, Yuen Yap Cheng, R Macqueen, Gordon G. Wallace, Timothy Schmidt
Integrating A Triplet-Triplet Annihilation Up-Conversion System To Enhance Dye-Sensitized Solar Cell Response To Sub-Bandgap Light, Andrew Nattestad, Yuen Yap Cheng, R Macqueen, Gordon G. Wallace, Timothy Schmidt
Australian Institute for Innovative Materials - Papers
The poor response of dye-sensitized solar cells (DSCs) to red and infrared light is a significant impediment to the realization of higher photocurrents and hence higher efficiencies. Photon up-conversion by way of triplet-triplet annihilation (TTA-UC) is an attractive technique for using these otherwise wasted low energy photons to produce photocurrent, while not interfering with the photoanodic performance in a deleterious manner. Further to this, TTA-UC has a number of features, distinct from other reported photon up-conversion technologies, which renders it particularly suitable for coupling with DSC technology. In this work, a proven high performance TTA-UC system, comprising a palladium porphyrin …
3d Hierarchical Rutile Tio2 And Metal-Free Organic Sensitizer Producing Dye-Sensitized Solar Cells 8.6% Conversion Efficiency, Jianjian Lin, Yoon-Uk Heo, Andrew Nattestad, Ziqi Sun, Lianzhou Wang, Jung Ho Kim, S X. Dou
3d Hierarchical Rutile Tio2 And Metal-Free Organic Sensitizer Producing Dye-Sensitized Solar Cells 8.6% Conversion Efficiency, Jianjian Lin, Yoon-Uk Heo, Andrew Nattestad, Ziqi Sun, Lianzhou Wang, Jung Ho Kim, S X. Dou
Australian Institute for Innovative Materials - Papers
Three-dimensional (3D) hierarchical nanoscale architectures comprised of building blocks, with specifically engineered morphologies, are expected to play important roles in the fabrication of 'next generation' microelectronic and optoelectronic devices due to their high surface-to-volume ratio as well as opto-electronic properties. Herein, a series of well-defined 3D hierarchical rutile TiO2 architectures (HRT) were successfully prepared using a facile hydrothermal method without any surfactant or template, simply by changing the concentration of hydrochloric acid used in the synthesis. The production of these materials provides, to the best of our knowledge, the first identified example of a ledgewise growth mechanism in a rutile …
Morphology-Controllable 1d-3d Nanostructured Tio2 Bilayer Photoanodes For Dye-Sensitized Solar Cells, Ziqi Sun, Jung Ho Kim, Yue Zhao, Darren Attard, S X. Dou
Morphology-Controllable 1d-3d Nanostructured Tio2 Bilayer Photoanodes For Dye-Sensitized Solar Cells, Ziqi Sun, Jung Ho Kim, Yue Zhao, Darren Attard, S X. Dou
Australian Institute for Innovative Materials - Papers
Morphology-controlled bilayer TiO2 nanostructures consisting of one-dimensional (1D) nanowire bottom arrays and a three-dimensional (3D) dendritic microsphere top layer were synthesized via a one-step hydrothermal method. These novel 1D-3D bilayer photoanodes demonstrated the highest energy conversion efficiency of 7.2% for rutile TiO2 dye-sensitized solar cells to date, with TiCl4 post-treatment.
Porous Titania Nanosheet/Nanoparticle Hybrids As Photoanodes For Dye-Sensitized Solar Cells, Yang Bai, Zheng Xing, Hua Yu, Zhen Li, Rose Amal, Lianzhou Wang
Porous Titania Nanosheet/Nanoparticle Hybrids As Photoanodes For Dye-Sensitized Solar Cells, Yang Bai, Zheng Xing, Hua Yu, Zhen Li, Rose Amal, Lianzhou Wang
Australian Institute for Innovative Materials - Papers
Porous titania nanohybrids (NHs) were successfully prepared by hybridizing the exfoliated titania nanosheets with anatase TiO2 nanoparticles. Various characterizations revealed that the titania NHs as photoanodes play a trifunctional role (light harvesting, dye adsorption, and electron transfer) in improving the efficiency (η) of the dye-sensitized solar cells. The optimized photoanode consisting layered NHs demonstrated a high overall conversion efficiency of 10.1%, remarkably enhanced by 29.5% compared to that (7.8%) obtained from the benchmark P25 nanoparticles under the same testing conditions.
Structurally Stabilized Mesoporous Tio2 Nanofibres For Efficient Dye-Sensitized Solar Cells, Fargol Hasani Bijarbooneh, Yue Zhao, Ziqi Sun, Yoon-Uk Heo, Victor Malgras, Jung Ho Kim, S X. Dou
Structurally Stabilized Mesoporous Tio2 Nanofibres For Efficient Dye-Sensitized Solar Cells, Fargol Hasani Bijarbooneh, Yue Zhao, Ziqi Sun, Yoon-Uk Heo, Victor Malgras, Jung Ho Kim, S X. Dou
Australian Institute for Innovative Materials - Papers
One-dimensional (1D) TiO2 nanostructures are very desirable for providing fascinating properties and features, such as high electron mobility, quantum confinement effects, and high specific surface area. Herein, 1D mesoporous TiO2 nanofibres were prepared using the electrospinning method to verify their potential for use as the photoelectrode of dye-sensitized solar cells (DSSCs). The 1D mesoporous nanofibres, 300 nm in diameter and 10-20 μm in length, were aggregated from anatase nanoparticles 20-30 nm in size. The employment of these novel 1D mesoporous nanofibres significantly improved dye loading and light scattering of the DSSC photoanode, and resulted in conversion cell efficiency of 8.14%, …
Cation Exchange At Semiconducting Oxide Surfaces: Origin Of Light-Induced Performance Increases In Porphyrin Dye-Sensitized Solar Cells, Matthew J. Griffith, Kenji Sunahara, Akihiro Furube, Attila J. Mozer, David L. Officer, Pawel Wagner, Gordon G. Wallace, Shogo Mori
Cation Exchange At Semiconducting Oxide Surfaces: Origin Of Light-Induced Performance Increases In Porphyrin Dye-Sensitized Solar Cells, Matthew J. Griffith, Kenji Sunahara, Akihiro Furube, Attila J. Mozer, David L. Officer, Pawel Wagner, Gordon G. Wallace, Shogo Mori
Australian Institute for Innovative Materials - Papers
The origin of simultaneous improvements in the short-circuit current density (Jsc) and open-circuit voltage (Voc) of porphyrin dye-sensitized TiO2 solar cells following white light illumination was studied by systematic variation of several different device parameters. Reduction of the dye surface loading resulted in greater relative performance enhancements, suggesting open space at the TiO2 surface expedites the process. Variation of the electrolyte composition and subsequent analysis of the conduction band potential shifts suggested that a light-induced replacement of surface-adsorbed lithium (Li+) ions with dimethylpropylimidazolium (DMPIm+) ions was responsible for an increased electron lifetime by decreasing the recombination with the redox mediator. …
A Study Of Tio2 Binder-Free Paste Prepared For Low Temperature Dye-Sensitized Solar Cells, Jeremy H. Yune, Inna Karatchevtseva, Gerri Triani, Klaudia Wagner, David Officer
A Study Of Tio2 Binder-Free Paste Prepared For Low Temperature Dye-Sensitized Solar Cells, Jeremy H. Yune, Inna Karatchevtseva, Gerri Triani, Klaudia Wagner, David Officer
Australian Institute for Innovative Materials - Papers
A binder-free titania paste was prepared by chemical modification of an acidic TiO2 sol with ammonia. By varying the ammonia concentration, the viscosity of the acidic TiO2 suspension increased, thereby allowing uniform films to be cast. The photoelectrochemical performance of TiO2 electrodes, cast as single layers, was dependent on the thermal treatment cycle. Fourier transform infrared spectroscopy was used to characterize the extent of residual organics and found that acetates from the TiO2 precursor preparation were retained within the electrode structure after thermal treatment at 150 °C. Electrodes of nominal thickness 4 lm produced an energy conversion efficiency as high …
Improved Photovoltaic Performance Of Dye-Sensitized Solar Cells With Modified Self-Assembling Highly Ordered Mesoporous Tio2 Photoanodes, Ziqi Sun, Jung Ho Kim, Yue Zhao, Fargol Bijarbooneh, Victor Malgras, S X. Dou
Improved Photovoltaic Performance Of Dye-Sensitized Solar Cells With Modified Self-Assembling Highly Ordered Mesoporous Tio2 Photoanodes, Ziqi Sun, Jung Ho Kim, Yue Zhao, Fargol Bijarbooneh, Victor Malgras, S X. Dou
Australian Institute for Innovative Materials - Papers
Strategies for improving the photovoltaic performance of dye-sensitized solar cells (DSSCs) are proposed by modifying highly transparent and highly ordered multilayer mesoporous TiO2 photoanodes through nitrogen-doping and top-coating with a light-scattering layer. The mesoporous TiO2 photoanodes were fabricated by an evaporation-induced self-assembly method. In regard to the modification methods, the light-scattering layer as a top-coating was proved to be superior to nitrogen-doping in enhancing not only the power conversion efficiency but also the fill factor of DSSCs. The optimized bifunctional photoanode consisted of a 30-layer mesoporous TiO2 thin film (4.15 mm) and a Degussa P25 light-scattering top-layer (4 mm), which …
Effects Of Atomic Layer Deposited Thin Films On Dye Sensitized Solar Cell Performance, Jonathan A. Campbell, Mervyn Deborniol, Attila J. Mozer, Peter J. Evans, Robert P. Burford, Gerry Triani
Effects Of Atomic Layer Deposited Thin Films On Dye Sensitized Solar Cell Performance, Jonathan A. Campbell, Mervyn Deborniol, Attila J. Mozer, Peter J. Evans, Robert P. Burford, Gerry Triani
Australian Institute for Innovative Materials - Papers
"The application of thin titania films by atomic layer deposition on top of a low temperature nanoparticulate TiO2 electrode was found to enhance the performance of dye sensitized solar cells. Dynamic measurements of photoinduced charge extraction showed that the atomic layer deposited top coat increased the electron lifetime at the same electron density. This was attributed to an increased electron trap concentration, which resulted in slower charge transport and increased charge carrier lifetimes.
Dye-Sensitized Cualo2 Photocathodes For Tandem Solar Cell Applications, Andrew Nattestad, Xiaoli Zhang, Udo Bach, Yi-Bing Cheng
Dye-Sensitized Cualo2 Photocathodes For Tandem Solar Cell Applications, Andrew Nattestad, Xiaoli Zhang, Udo Bach, Yi-Bing Cheng
Australian Institute for Innovative Materials - Papers
Dye-sensitized solar cells (DSCs) using the p-type semiconductor CuAlO2, in conjunction with a highly effective hole injecting dye and an iodide-triiodide-based electrolyte have been produced, demonstrating photocathodic behavior. An improved open-circuit voltage (VOC) of 333 mV was observed, compared to analogous devices using NiO, which can be explained by the CuAlO2 valence-band energy, which is lower on the vacuum scale than that of NiO. Incident photon-to-charge-carrier efficiency response confirms that the observed photocurrent is generated by the dye.
Dithienothiophene (Dtt)-Based Dyes For Dye-Sensitized Solar Cells: Synthesis Of 2,6-Dibromo-Dtt, Tae-Hyuk Kwon, Vanessa Armel, Andrew Nattestad, Douglas R. Macfarlane, Udo Bach, Samuel J. Lind, Keith C. Gordon, Weihua Tang, David J. Jones, Andrew Holmes
Dithienothiophene (Dtt)-Based Dyes For Dye-Sensitized Solar Cells: Synthesis Of 2,6-Dibromo-Dtt, Tae-Hyuk Kwon, Vanessa Armel, Andrew Nattestad, Douglas R. Macfarlane, Udo Bach, Samuel J. Lind, Keith C. Gordon, Weihua Tang, David J. Jones, Andrew Holmes
Australian Institute for Innovative Materials - Papers
A one-pot synthesis of 2,6-dibromodithieno[3,2-b;2′,3′-d]thiophene (dibromo-DTT, 4) was developed. A key step was bromodecarboxylation of DTT-2,6-dicarboxylic acid, obtained by saponification of the diester 1. The donor-acceptor dye DAHTDTT (13), based on a central 2,6-bis[2′-(3′-hexylthienyl)]dithieno[3,2-b;2′,3′-d]thiophene core (9), was prepared and incorporated in a dye-sensitized solar cell (DSC), which exhibited an energy conversion efficiency of 7.3% with Voc of 697 mV, Jsc of 14.4 mA/cm2, and ff of 0.73 at 1 sun.
Efficient Dye Sensitized Solar Cells Based On A 2-Thiophen-2-Yl-Vinyl-Conjugated Ruthenium Photosensitizer And A Conjugated Polymer Hole Conductor, Attila Mozer, Y Wada, K-J Jiang, N Masaki, S Yanagida, Shogo Mori
Efficient Dye Sensitized Solar Cells Based On A 2-Thiophen-2-Yl-Vinyl-Conjugated Ruthenium Photosensitizer And A Conjugated Polymer Hole Conductor, Attila Mozer, Y Wada, K-J Jiang, N Masaki, S Yanagida, Shogo Mori
Australian Institute for Innovative Materials - Papers
Efficient dye-sensitized TiO2 solar cells based on a 2-thiophen-2-yl-vinyl-conjugated ruthenium photosensitizer and a conjugated polymer poly(3,4-ethylenedioxythiophene) have been fabricated. A maximum power conversion efficiency of 2.6% is achieved when the mesoporous TiO2 layer is 5–6 μm. The high fill factor (0.74), the open circuit voltage (0.78V), and the linear light intensity dependence of the short circuit current density (4.5mA cm−2 at 100 mW cm−2) make these devices promising for solid state photovoltaic applications.