Proceedings of International Conference Asia-Pacific Hybrid and Organic Photovoltaics 2018 (AP-HOPV18)
Publication date: 27th October 2017
Perovskite solar cells (PSCs) have been attracting wide range of interests from the researchers of solar cell fields. Up to now, the best certified conversion efficiency has reached 22.7%, approaching to the theoretical limit of conversion efficiency; therefore, importance of branching technologies such as lead-free materials, high durability, and development of flexible device. A reason of low stability of perovskite material is attributed to the methylammonium (MA) cation in APbX3-type perovskite, because of its high volatility. Currently, triple cation (FAMACs)Pb(IBr)3 (FA = formamidinium) and quadruple cation (FAMACsRb)Pb(IBr)3 perovskites are reported as highly efficient and stable perovskite materials for solar cell application. However, they contain highly volatile MA, and thus, we expected if MA is removed from the perovskites, their stability can be further improved. According to the assumption, we have tried to replace (or remove) MA cation in a triple cation perovskites by Rb+ ion to improve stability of perovskite material, and prepared PSCs using the new perovskite material. Additionally, we also applied the low-temperature process to the new triple-cation based PSCs.
We examined influence of Rb ratio on perovskite formation, and evaluated their photoluminescent property and stabilities against air, humidity, and thermal stress. The FACsRb perovskite showed higher thermal stability than conventional triple cation perovskite, FAMACs. Based on the new triple-cation perovskite (FA1-x-yCsxRby)Pb(I1-zBrz)3, we prepared a simple planar-type PSC. On a low-temperature processed TiOX compact layer, planar-type PSCs were prepared. By optimization of the device fabrication process for electron and hole blocking layers, the best conversion efficiency of 19.8% in J-V and stabilized output power of 20.3% were obtained on a 5 × 5 mm2 area cell with negligible hysteresis for J-V curve.
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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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