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Full-Text Articles in Physical Sciences and Mathematics

Fabrication Conditions For Efficient Organic Photovoltaic Cells From Aqueous Dispersions Of Nanoparticles, Monojit Bag, Timothy S. Gehan, Lawrence A. Renna, Dana D. Algaier, Paulm M. Lahti, Dhandapani Venkataraman Sep 2014

Fabrication Conditions For Efficient Organic Photovoltaic Cells From Aqueous Dispersions Of Nanoparticles, Monojit Bag, Timothy S. Gehan, Lawrence A. Renna, Dana D. Algaier, Paulm M. Lahti, Dhandapani Venkataraman

Dhandapani Venkataraman

For environmentally friendly and cost-effective manufacturing of organic photovoltaic (OPV) cells, it is highly desirable to replace haloarenes with water as the active layer fabrication solvent. Replacing an organic solvent with water requires retooling the device fabrication steps. The optimization studies were conducted using poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C61 butyric acid methyl ester (PCBM) as active layer materials. These materials were dispersed in water as blend and separate nanoparticles using the miniemulsion method. Topologies of the active layers were investigated using atomic force microscopy and electron microscopy techniques. We have identified two essential steps to fabricate efficient OPVs from aqueous …


Revisiting Melting Point Alternation In Hydrocarbons Using Pixel, Dhandapani Venkataraman Jan 2009

Revisiting Melting Point Alternation In Hydrocarbons Using Pixel, Dhandapani Venkataraman

Dhandapani Venkataraman

We revisit the explanations for the alternation in melting points of linear alkanes by calculating the lattice energies using PIXEL. The lattice energies obtained from PIXEL at optimal box radium are in excellent agreement with the enthalpy of sublimation. Partitioning of the lattice energy indicate that arguments based on the gain in dispersion energy is insufficient to explain the alternation in melting points in linear alkanes. Entropy of fusion plays a major role in the explanation for the observed melting point alternation in alkanes.


Formation Of Aryl-Nitrogen Bonds Using A Soluble Copper(I) Catalyst, Dhandapani Venkataraman Jan 2001

Formation Of Aryl-Nitrogen Bonds Using A Soluble Copper(I) Catalyst, Dhandapani Venkataraman

Dhandapani Venkataraman

No abstract provided.