Proceedings of International Conference Asia-Pacific Hybrid and Organic Photovoltaics 2018 (AP-HOPV18)
DOI: https://doi.org/10.29363/nanoge.ap-hopv.2018.060
Publication date: 27th October 2017
Perovskite solar cells (PSC) have attracted much attention in recent years due to the rapid progress on the performance of PSC to attain PCE over 22 % within 5 years. However, conventional perovskite light absorbers contain the toxic lead element that should be replaced by other environmentally benign elements. Herein we report both tin-rich and pure tin-based PSC based on various device configurations. For the tin-rich perovskites, we designed and synthesized alloyed Sn-Pb mixed halide perovskites by dipping the precursor solutions on the mesoporous films with the TiO2/Al2O3/C configuration to form solar cells free of organic HTM. The photovoltaic performance was further improved on adding 30 mol % of tin fluoride (SnF2) with device configuration FTO/TiO2/Al2O3/NiO/C producing best power conversion efficiency 5.2 % with great reproducibility and intrinsic stability. To make a stable pure tin perovskite free of lead, we varied SnCl2/SnBr2 ratios to yield tin perovskites with three halides (I, Br and Cl) co-crystallized inside the tin-perovskite crystals (MASnIBr2-xClx) according to the stoichiometric ratios of the precursors. When the SnCl2 proportion was equal to or greater than 50 % (x 1), phase separation occurred to generate MASnI3-yBry and MASnCl3-zBrz according to the stoichiometric proportions of their precursors, confirmed with the corresponding XRD analysis. A device with MASnIBr1.8Cl0.2 (SnCl2 = 10 %) showed the best photovoltaic performance: JSC = 14.0 mA cm-2, VOC = 380 mV, FF = 0.573 and PCE = 3.1 %, with great reproducibility and long-term stability. The devices made of 2D tin-based PSC will also be introduced and discussed.
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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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