1. Light‐Emitting Metal–Organic Halide 1D and 2D Structures: Near‐Unity Quantum Efficiency, Low‐Loss Optical Waveguide and Highly Polarized Emission.
- Author
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Liu, Feng, Zhang, Tongjin, Mondal, Debayan, Teng, Shiyong, Zhang, Ying, Huang, Keke, Wang, Dayang, Yang, Wensheng, Mahadevan, Priya, Zhao, Yong Sheng, Xie, Renguo, and Pradhan, Narayan
- Subjects
QUANTUM efficiency ,PHOTOEMISSION ,INTRAMOLECULAR proton transfer reactions ,STOKES shift ,AMMONIUM chloride ,EXCITON theory ,OPTICAL properties ,WAVEGUIDES - Abstract
Organic–inorganic metal‐halide materials (OIMMs) with zero‐dimensional (0D) structures offer useful optical properties with a wide range of applications. However, successful examples of 0D structural OIMMs with well‐defined optical performance at the micro‐/nanometer scale are limited. We prepared one‐dimensional (1D) (DTA)2SbCl5⋅DTAC (DTAC=dodecyl trimethyl ammonium chloride) single‐crystal microrods and 2D microplates with a 0D structure in which individual (SbCl5)2− quadrangular units are completely isolated and surrounded by the organic cation DTA+. The organic molecular unit with a long alkyl chain (C12) and three methyl groups enables microrod and ‐plate formation. The single‐crystal microrods/‐plates exhibit a broadband orange emission peak at 610 nm with a photoluminescence quantum yield (PLQY) of ca. 90 % and a large Stokes shift of 260 nm under photoexcitation. The broad emission originates from self‐trapping excitons. Spatially resolved PL spectra confirm that these microrods exhibit an optical waveguide effect with a low loss coefficient (0.0019 dB μm−1) during propagation, and linear polarized photoemission with a polarization contrast (0.57). [ABSTRACT FROM AUTHOR]
- Published
- 2021
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