Photoluminescent-dielectric duple switch in a perovskite-type high-temperature phase transition compound: [(CH3)3PCH2OCH3][PbBr3]. Issue 29 (12th July 2017)

• Record Type: Journal Article
• Authors: Geng, Fu-Juan; Wu, De-Hong; Zhou, Lin; Shi, Ping-Ping; Li, Peng-Fei; Gao, Ji-Xing; Zheng, Xuan; Fu, Da-Wei; Ye, Qiong
• Is Part Of: Dalton transactions. Volume 46:Issue 29(2017)
• Page Start: 9528
• Page End: 9534
• Publication Date: 2017-07-12
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c7dt01780d
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : A perovskite-type high-temperature phase transition compound, ([(CH3 )3 PCH2 OCH3 ][PbBr3 ], 1 ), displays a remarkable bistable photoluminescent-dielectric duple switching behavior. Abstract : A bistable optical–electrical duple switch belongs to a class of highly satisfying intelligent materials that can transform optical and electrical responses simultaneously in one device. A perovskite-type high-temperature phase transition compound with one-dimensional chain-like crystal structure, ([(CH3 )3 PCH2 OCH3 ][PbBr3 ], 1 ), displays remarkable bistable photoluminescent-dielectric duple switching behaviors. The noteworthy order–disorder transition of the phosphonium cation and the motions of anions contribute to the phase transition, leading to the space group P 21 / c at a low temperature phase to C 2/ c at a high temperature phase.1 exhibits a prominent step-like dielectric anomaly at 401.0 K and demonstrates novel optical properties with a band gap of 3.54 eV. The photoluminescence intensity suddenly declines from 398 K to 408 K, which may be attributed to the occurrence of phase transition. The electron cloud distributions of the frontier orbital in compound1 have been calculated using a DFT program.