甲脒
卤化物
钙钛矿(结构)
材料科学
钙钛矿太阳能电池
光伏
无机化学
串联
太阳能电池
六方晶系
开路电压
吸收(声学)
化学
金属
结晶学
光电子学
光伏系统
复合材料
冶金
电压
物理
生物
量子力学
生态学
作者
Teck Ming Koh,Kunwu Fu,Yanan Fang,Chen Shi,Tze Chien Sum,Nripan Mathews,Subodh Mhaisalkar,Pablo P. Boix,Tom Baikie
摘要
Solid-state, solution processed solar-cells based on organic–inorganic methyl ammonium lead halide absorbers have achieved efficiencies in excess of 15%, which has superseded liquid dye sensitized cells, as well as various thin film-based photovoltaics. This report introduces a new metal-halide perovskite, based on the formamidinium cation (HC(NH2)2+), that displays a favorable band gap (1.47 eV) and represents a broader absorption compared to previously reported absorbers that contained the methylammonium cation (CH3NH3+). The high open-circuit voltage (Voc = 0.97 V) and promising fill-factor (FF = 68.7%) yield an efficiency of 4.3%, which make this material an excellent candidate for this new class of perovskite solar cell. This report also investigates the formation of a black trigonal (P3m1) perovskite polymorph and a yellow hexagonal nonperovskite (P63mc) polymorph. Further solar cell development would entail the stabilization of the black trigonal (P3m1) perovskite polymorph over the yellow hexagonal nonperovskite (P63mc) polymorph.
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