Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV22)
DOI: https://doi.org/10.29363/nanoge.hopv.2022.083
Publication date: 20th April 2022
Despite the promising properties of tin halide perovskites (Sn-HPs), one of the most relevant handicaps lies on the fast Sn+2 oxidation, which drastically limits the preparation of highly efficient and long-lasting photovoltaic devices. Our recent studies have also revealed a direct correlation between the halide’s reactivity and the formation of crystalline defects that detrimentally affect the device's performance, and contribute to the Sn-HP degradation. Aimed at minimizing these dramatic limitations, a synthetic procedure based on a synergistic chemical engineering approach, that consists on adding a bulky cation, together with a reducing agent which prevents premature oxidative reactions, has been developed. This strategy allows obtaining photoconversion efficiencies (PCEs) above 10% with an unprecedented stability at operating conditions. More specifically, the initial PCE remains unchanged upon 5 hours in air (60% RH) at maximum-power-point (MPP), and remarkably, 96% of the initial PCE is retained after 1300 hours at MPP in N2. To the best of our knowledge, these are the highest stability values reported for unencapsulated Sn-HP based solar cells. Interestingly, our findings demonstrate a beneficial synergistic effect when these additives are incorporated, highlight the important role of iodide on the performance upon light-soaking and ultimately, unveil mechanistic details that manifest the relevance of controlling the halides chemistry towards a successful improvement of the photovoltaics technology based on Sn-HPs.
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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.
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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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