title: Nanowire perovskite solar cell.
abstract: Organolead iodide perovskite, CH3NH3PbI3, was prepared in the form of nanowire by means of a small quantity of aprotic solvent in two-step spin-coating procedure. One-dimensional nanowire perovskite with the mean diameter of 100 nm showed faster carrier separation in the presence of hole transporting layer and higher lateral conductivity than the three-dimensional nanocuboid crystal. Reduction in dimensionality resulted in the hypsochromic shift of both absorption and fluorescence spectra, indicative of more localized exciton states in nanowires. The best performing device employing nanowire CH3NH3PbI3 delivered photocurrent density of 19.12 mA/cm(2), voltage of 1.052 V, and fill factor of 0.721, leading to a power conversion efficiency (PCE) of 14.71% at standard AM 1.5G solar illumination. A small I-V hysteresis was observed, where a PCE at forward scan was measured to be 85% of the PCE at reverse scan.
authors.affiliation: School of Chemical Engineering and Department of Energy Science, Sungkyunkwan University , Suwon 440-746, Korea.
authors.forename: Jeong-Hyeok
authors.initials: JH
authors.lastname: Im
authors.forename: Jingshan
authors.initials: J
authors.lastname: Luo
authors.forename: Marius
authors.initials: M
authors.lastname: Franckevičius
authors.forename: Norman
authors.initials: N
authors.lastname: Pellet
authors.forename: Peng
authors.initials: P
authors.lastname: Gao
authors.forename: Thomas
authors.initials: T
authors.lastname: Moehl
authors.forename: Shaik Mohammed
authors.initials: SM
authors.lastname: Zakeeruddin
authors.forename: Mohammad Khaja
authors.initials: MK
authors.lastname: Nazeeruddin
authors.forename: Michael
authors.initials: M
authors.lastname: Grätzel
authors.forename: Nam-Gyu
authors.initials: NG
authors.lastname: Park
keywords: CH3NH3PbI3; aprotic solvent; nanowire; perovskite; solar cell