Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP24)
Publication date: 18th October 2023
Perovskite solar cells (PSCs) have emerged as promising next-generation photovoltaic devices because of their superior optical and electronic properties. In recent years, organic hole transporting material (HTM) based PSCs have been reported with remarkable increase in the photovoltaic performance. As power conversion efficiency (PCE) of PSCs employing organic HTM has dramatically increased, expectations toward commercialization of PSCs are increasing. However, traditional organic HTMs have a couple of issues such as cost and stability. In the view of this limitation, we have developed the new p-type inorganic HTM. Cobalt sulfide compounds are one of the promising materials to replace conventional organic HTMs, which are less expensive and earth-abundant. Nevertheless, synthesis of cobalt sulfide is tricky to control the stoichiometric ratio. Here, we synthesized novel inorganic HTMs as a stoichiometrically adjusted p-type cobalt sulfide nanocrystals (CoxSy NCs). Cobalt sulfide nanocrystals synthesized in this study display the excellent hole transport ability owing to its high conductivity and suitable energy levels for hole extraction for PSCs. CoxSy NCs HTLs-based PSCs exhibited power conversion efficiency (PCE) nearly comparable to dopants-free spiro-OMeTAD HTM-based PSCs. Especially, the PSCs with mixed CoxSy NCs (with undoped Spiro-OMeTAD) HTLs exhibited PCE of 20.48 % which belongs to the high-performance, considering ionic additive-free HTMs. Furthermore, the PCSs employing cobalt sulfide showed an initial efficiency of 92 % even after exposure to 70 % relative humidity for 1000 hours. These new p-type CoxSy NCs would support environmentally and economically sustainable development of PSC and diverse optoelectronic area.
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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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