title: High-efficiency perovskite solar cells based on the black polymorph of HC(NH2)2 PbI3.
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.
authors.affiliation: Department of Energy Science, Sungkyunkwan University, Suwon, 440-746, Korea.
authors.forename: Jin-Wook
authors.initials: JW
authors.lastname: Lee
authors.forename: Dong-Jin
authors.initials: DJ
authors.lastname: Seol
authors.forename: An-Na
authors.initials: AN
authors.lastname: Cho
authors.forename: Nam-Gyu
authors.initials: NG
authors.lastname: Park
mesh_terms: D065966:Absorption, Physicochemical; D000578:Amidines / Q000737:chemistry*; D017610:Calcium Compounds / Q000737:chemistry*; D002482:Cellulose / Q000031:analogs & derivatives / Q000737:chemistry; D011211:Electric Power Supplies; D007454:Iodides / Q000737:chemistry*; D007854:Lead / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D012993:Solar Energy; D014025:Titanium / Q000737:chemistry*
chemical_list: D000578:Amidines; D017610:Calcium Compounds; D007454:Iodides; D010087:Oxides; C059910:perovskite; C009495:titanium dioxide; D007854:Lead; C077922:formamidine; C013517:ethyl cellulose; D002482:Cellulose; D014025:Titanium
keywords: HC(NH2)2I; HC(NH2)2PbI3; formamidinium lead iodide; perovskite solar cells; record efficiency