1. Luminescence properties of Mn-doped 2D organic-inorganic hybrid perovskites: Insights from (PPA)2PbBr4 perovskite.
- Author
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Li, Shixian, Jiang, Jialiang, Zhang, Hao, Fu, Hui, Liu, Jizhong, Song, Yusheng, Cao, Sheng, Yang, Weiyou, Zheng, Jinju, and Zhao, Jialong
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PEROVSKITE , *OPTICAL properties , *ENERGY transfer , *LUMINESCENCE , *EXCITON theory , *ACTIVATION energy , *ELECTRON traps - Abstract
• A series of Mn-doped A 2 PbBr 4 2D perovskites are synthesized and the luminescence properties of Mn2+ ions in related to the A-site cations is explored. • The highest efficiency of the energy transfer from excitons to Mn2+ reaches as high as 78.08 % in (PPA) 2 PbBr 4 :60 % Mn2+ 2D perovskite. • The luminescence mechanism of Mn-doped (PPA) 2 PbBr 4 perovskite with different Mn2+ concentrations are investigated by temperature dependent PL spectra. The incorporation of Mn2+ ions has been widely used to modulate optical properties of two-dimensional (2D) organic-inorganic hybrid perovskites (OIHPs). However, the luminescence mechanism of Mn2+ ions that is related to the A-site cations remains largely unexplored. Herein, we report the synthesis of a series of Mn-doped A 2 PbBr 4 (A = C 6 H 5 (CH 2) n NH 3 , n = 1,2,3,4,) 2D perovskites. The (C 6 H 5 (CH 2) 3 NH 3) 2 PbBr 4 ((PPA) 2 PbBr 4) 2D perovskite exhibited a maximum photoluminescence (PL) quantum yield of 67 %, a prolonged PL lifetime of 0.75 ms, and the highest energy transfer efficiency of 78.07 %. Furthermore, we systematically investigated the luminescence properties of Mn-doped (PPA) 2 PbBr 4 perovskite with different Mn2+ concentrations. The temperature dependent PL spectra indicate a thermalized de-trap process of self-trapped exciton at high temperatures and the presence of permanently shallow defect states in highly doped samples with lower activation energy. We reported the luminescence properties of Mn-doped 2D organic-inorganic hybrid perovskites, with a particular focus on the (PPA) 2 PbBr 4 perovskite material. [Display omitted] [ABSTRACT FROM AUTHOR]
- Published
- 2024
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