Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV16)
Publication date: 28th March 2016
Organometal halide perovskites have emerged as promising absorber materials for solar cells in the last years. With the fast improvement in power conversion efficiency to over 20 % [1], perovskites have high prospects for low-cost, high efficiency solar cell production. ð¶ð»3ð‘ð»3ð‘ƒð‘ð¼3−ð‘¥ð¶ð‘™ð‘¥ layers can be prepared by a one-step solution based process using ð‘ƒð‘ð¶ð‘™2 and ð‘€ð´ð¼ precursors dissolved in DMF.[2] While solution based processes do not need cost intensive vacuum technology and no high-temperature annealing steps, little is known about the exact mechanisms during synthesis. Employing in-situ photoluminescence and reflection spectroscopy we are able to follow the formation of mixed iodine-chlorine perovskite thin-films in real-time. The evolution of optoelectronic properties is analysed for various temperature profiles and annealing conditions. Intermediate states are characterized in detail using ex-situ optical spectroscopy techniques as well as X-ray diffraction and X-ray fluorescence. Correlating structural and electronic properties, we will present a detailed view on the reaction route during synthesis and specifically the influence of annealing conditions on the optoelectronic properties of the final absorber.
[1] NREL, Best Research Cell Efficiency, 04/04/2016
[2] Lee et al., Science 2012, 338 (6107), 643–647.
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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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