Complete Conversion of PbI2to Methyl Ammonium PbI3Improves Perovskite Solar Cell Efficiency.
One major disadvantage to the two-step deposition method of perovskite films is the incomplete conversion from PbI2to perovskite resulting in the presence of a thick PbI2layer, which hinders charge carrier transportation. In this study, a quaternary ammonium salt has been used to manipulate the crystallization of PbI2in the first deposition step, which leads to facile incorporation of the methylammonium iodide into the Pb-I lattice and promotes the conversion of PbI2to perovskite leading to improved device performance.
Department of Chemistry, Case Western Reserve University, 10900 Euclid Ave., Cleveland, OH, 44106, USA.
Lili
L
Wang
Department of Chemistry, Case Western Reserve University, 10900 Euclid Ave., Cleveland, OH, 44106, USA.
Wei-Chun
WC
Lin
Department of Chemistry, Case Western Reserve University, 10900 Euclid Ave., Cleveland, OH, 44106, USA.
Christopher
C
McCleese
Department of Chemistry, Case Western Reserve University, 10900 Euclid Ave., Cleveland, OH, 44106, USA.
Anton
A
Kovalsky
School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai, 200240, China.
Yixin
Y
Zhao
Department of Chemistry, Case Western Reserve University, 10900 Euclid Ave., Cleveland, OH, 44106, USA.
Clemens
C
Burda
PCE; efficiency; perovskite; solar cells; tetraoctylammonium bromide