Exciton–exciton scattering in perovskite CH3NH3PbBr3 single crystal. (17th May 2016)

• Record Type: Journal Article
• Authors: Kunugita, Hideyuki; Kiyota, Yuki; Udagawa, Yosuke; Takeoka, Yuko; Nakamura, Yuiga; Sano, Junro; Matsushita, Tomonori; Kondo, Takashi; Ema, Kazuhiro
• Is Part Of: Japanese journal of applied physics. Volume 55:Number 6(2016:Jun.)
• Publication Date: 2016-05-17
• Subjects: Physics -- Periodicals; 621.05
• DOI: 10.7567/JJAP.55.060304
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: We have measured photoluminescence spectra in CH3 NH3 PbBr3 at low temperatures and found a nonlinear emission at the lower energy side of the exciton resonance. Considering that this signal shows a rapid decay, we have assigned it as originating from the exciton–exciton inelastic scattering process called P-emission. The energy difference between this P-emission and the free exciton resonance is 20–30 meV, which is consistent with recent studies of the exciton binding energy.