High-efficiency perovskite solar cells based on the black polymorph of HC(NH2)2 PbI3.

Lee, Jin-Wook; Seol, Dong-Jin; Cho, An-Na; Park, Nam-Gyu · Adv Mater · 2014

basic_science · Level V

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Abstract

Perovskite solar cells with power conversion efficiencies exceeding 16% at AM 1.5 G one sun illumination are developed using the black polymorph of formamidnium lead iodide, HC(NH2)2 PbI3 . Compared with CH3 NH3 PbI3 , HC(NH2 )2 PbI3 extends its absoprtion to 840 nm and shows no phase transition between 296 and 423 K. Moreover, a solar cell based on HC(NH2 )2 PbI3 exhibits photostability and little I-V hysteresis.

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