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Development And Non-Toxic And Stable Perovskites For High Efficiency Solar Cells, Duyen H. Cao
Development And Non-Toxic And Stable Perovskites For High Efficiency Solar Cells, Duyen H. Cao
Link Foundation Energy Fellowship Reports
The efficiency of halide perovskite solar cells has dramatically increased from 9% to 22% in less than 5 years.1 They have shown promise toward the future for low cost and highly efficient solar electricity. While there are still considerable rooms for device optimization, it is now the time to tackle the device long-term stability and toxicity challenges. The presence of Pb in the champion material, methylammonium lead iodide CH3NH3PbI3, may prevent this technology from large-scale deployment due to environmental and health concerns. Attempts have been made in replacing Pb with other non-toxic metals such as Sn, Bi, or Sb.2-6 Long-term …
Polyelectrolyte Materials For Dielectric Elastomer Energy Harvesting, Mihai Duduta
Polyelectrolyte Materials For Dielectric Elastomer Energy Harvesting, Mihai Duduta
Link Foundation Energy Fellowship Reports
Dielectric elastomers actuators are compliant capacitors which can convert electrical energy into mechanical energy [1]. The simplest device consists of a thin elastomer sheet sandwiched between two compliant electrodes. In actuation mode, a voltage is applied to the electrodes and the attractive Coulombic force between the opposing charges squeezes the elastomer causing it to expand perpendicular to the applied electric field. Since they are electrically driven, the response speed of DEAs is usually limited by the viscoelastic response of the constituent polymer. In terms of ease of delivering power, as well as response speed, DEAs are some of the most …
Solar Energy Storage Using Earth-Abundant Materials, Christopher W. Roske
Solar Energy Storage Using Earth-Abundant Materials, Christopher W. Roske
Link Foundation Energy Fellowship Reports
Among alternative energy technologies, solar is well suited to meet the grand energy challenge ahead if we can overcome the intermittent supply of sunlight.1,2 Storing solar energy in chemical bonds serves as an attractive technical solution that requires selecting suitable chemical reactions and building tailored systems.3 Many research groups are aiming to electrochemically reduce carbon dioxide to a solar fuel, such as ethanol, or split water into hydrogen and oxygen gas, but these groups have been unable to design efficient and cheap systems that navigate these complex multi-step chemical transformations without encountering significant parasitic overpotentials.4 While we fully expect further …