Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP23)
Publication date: 21st November 2022
Perovskite solar cells have high energy conversion efficiency (25% in 2021) [1] and are attracting attention as one of the next generation solar cells that are expected to solve global energy problems. Although perovskite solar cells can be easily synthesized at low cost, typical compound materials contain toxic Pb, and there is a need to develop non-toxic and widely available perovskite solar cell materials from the viewpoint of practical use. In recent years, perovskites containing Sn and Ge, which have optoelectronic properties such as a small direct band gap and high carrier conductivity comparable to those of Pb-based perovskites, have been investigated as having great potential for practical applications. However, one drawback of Sn- and Ge-containing perovskites is that they are prone to defect structures that reduce photoelectric conversion efficiency [2]. The presence of defect levels in the band gap traps electrons and prevents smooth charge transfer, leading to carrier recombination, which is the cause of reduced photoelectric conversion efficiency. In this study, we analyze the defect structures of FASnI3 and FAGeI3 single perovskites and FA2SnGeI6 double perovskite using first-principles calculations to find clues for improving energy conversion efficiency.
This research is supported by NEDO project of "Research and Development Program for Promoting Innovative Clean Energy Technologies Through International Collaboration".
The computations were performed at the Research Center for Computational Science, Okazaki, Japan (Project: 22-IMS-C064) and the Center for Computational Materials Science, Institute for Materials Research, Tohoku University for the use of MASAMUNE-IMR (MAterials science Supercomputing system for Advanced MUlti-scale simulations towards NExt-generation-Institute for Materials Research).
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International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
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