Research
Lead-based perovskite solar cells
Hybrid organic-inorganic perovskites with the formula ABX3 (where A is an organic cation, B is a metal cation, and X is a halide anion) hold great promise for providing the clean energy and safety needed to meet decarbonization goals. They have achieved great success as solar cell materials with high energy conversion efficiency. Even more attractive, they are bandgap tunable, lightweight and flexible, and can be produced using low-cost processes compatible with print manufacturing. These properties qualify them as ideal candidates for building-integrated photovoltaics (BIPV) and many mobility applications such as vehicles, boats, and aircraft where conventional silicon solar cells cannot be used. My research is primarily focused on improving the operational stability of perovskite solar cells. See relevant publications in Nature, Nature Communications, Advanced Materials, Advanced Functional Materials, and review articles on npj Flexible Electronics, Advanced Materials, and Chemical Reviews.
Doped organic semiconductors
Organic semiconductors play a crucial role in all types of optoelectronic devices, including perovskite solar cells. Their unique advantages such as excellent flexibility, good solubility in organic solvents, and easy processing in solutions make them promising candidates for flexible devices. However, organic molecules are generally insulating and not good for charge collection and transport properties. My research interests focus on developing novel and stable doping strategies to improve their performance in optoelectronic devices. See relevant publications in Science.
Lead-free perovskite solar cells
Despite the exciting progress in lead-based perovskite solar cells, the current reliance on toxic Pb in perovskite materials is a key problem on the path to commercialization of these cells. To address this issue, I am also interested in the development of novel lead-free perovskite materials, including tin (Sn)-based perovskites and double perovskites. See relevant publications in Angewandte Chemie, Advanced Materials, and a review article on the challenges and progress in lead-free halide double perovskite Solar RRL.
