Proceedings of Asia-Pacific Conference on Perovskite, Organic Photovoltaics&Optoelectronics (IPEROP25)
Publication date: 17th October 2024
Vacancy defects in perovskites are a significant problem that leads to the degradation of perovskite solar cells (PSCs). Strategies of introducing excessive ionic iodide has been employed to compensate for these vacancies. However, these excessive ionic iodides cannot effectively reduce defects during the perovskite crystallization process, as their similar chemical properties as the original ionic iodide in the precursor solution. Moreover, these iodide ions present in the perovskite films can act as interstitial defects, which are detrimental to the stability of the perovskite. We find that vacancy defects can be effectively suppressed by inclusion of α-iodo ketone during the perovskite crystallization. This suppression is achieved by a rapid collective transformation of lead polyhalides through halides ions release of Kornblum oxidation reaction. More importantly, excessive iodides within formed perovskite film can be removed by a subsequent elimination reaction. Based on this strategy, the PSC achieves significantly improved thermal stability, which maintain 82% of initial PCE for 2800 h at 85 °C.
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International Conference on Hybrid and Organic Photovoltaics
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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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