期刊
NANO ENERGY
卷 77, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2020.105170
关键词
Organic-inorganic metal halides; Luminescence; Photoluminescence quantum yield; Thermostability
类别
资金
- National Natural Science Foundation of China of China [11874200, 11574138, 21503130, 11674212]
- Top-Notch Young Talents Program of China
- National Key R&D Program of China [2016YFA0201104]
- Dengfeng Project B of Nanjing University
- Open Fund of Key Laboratory for Intelligent Nano Materials and Devices of the Ministry of Education [INMD-2020M06]
- Shanghai Key Laboratory of High Temperature Superconductors
The rapid development of organic-inorganic metal halides in optoelectronic devices has been considered a promising approach for light-emitting diodes. Mn-based halogen hybrids represent a class of fascinating luminescence functional materials. Up to date, studies on Mn-based metal halides remain blurry and suffer from instability and low photoluminescence quantum yield (PL QY). Here, the single crystalline of MEA(MnBr4-xClx)(2) (MEA=((CH3)(4)N)((C2H5)(4)N)(2)center dot NH4, x = 0, 2, 3) were designed and constructed by a one-pot solution method for the first time, featuring brilliant green emissions under ultraviolet light and revealing PL QY up to 99 +/- 1% with x = 3 at room temperature. The excellent luminescence is ascribed to the Mn2+ d(5) configuration with the T-4(1)-(6)A(1) transition. Moreover, the thermostability and anomalous photoluminescence (PL) behavior triggered by heat are modulated via varying halogen ratio Cl/Br. Particularly, MEA(MnBr4)(2) has an ultrahigh melting up to 600 K, which is, as we know, the highest one among the Mn-based organic-inorganic hybrid compounds. Our findings not only present the outstanding performance of three crystals, but also highlight the potential of these compounds in optoelectronics.
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