文献类型：期刊文献

英文题名：Pressure-Treated Engineering to Harvest Enhanced Green Emission in Mn-Based Organic-Inorganic Metal Halides at Ambient Conditions

作者：Zhao, Xiaohui[1];Wu, Min[1];Liu, Hao[1,2];Wang, Yixuan[1];Wang, Kai[1];Yang, Xinyi[1];Zou, Bo[1]

第一作者：Zhao, Xiaohui

通讯作者：Liu, H[1];Yang, XY[1];Zou, B[1];Liu, H[2]

机构：[1]Jilin Univ, State Key Lab Superhard Mat, Coll Phys, Changchun 130012, Peoples R China;[2]Xinxiang Univ, Sch Phys & Elect Engn, Xinxiang 453003, Henan, Peoples R China

第一机构：Jilin Univ, State Key Lab Superhard Mat, Coll Phys, Changchun 130012, Peoples R China

通讯机构：[1]corresponding author), Jilin Univ, State Key Lab Superhard Mat, Coll Phys, Changchun 130012, Peoples R China;[2]corresponding author), Xinxiang Univ, Sch Phys & Elect Engn, Xinxiang 453003, Henan, Peoples R China.|[11071]新乡学院;

年份：2022

卷号：32

期号：10

外文期刊名：ADVANCED FUNCTIONAL MATERIALS

收录：;EI(收录号：20214811232629);Scopus(收录号：2-s2.0-85119690540);WOS:【SCI-EXPANDED(收录号:WOS:000721824500001)】；

基金：This work was supported by the National Natural Science Foundation of China (Nos. 11874027 and 21725304) and the China Postdoctoral Science Foundation (Nos. 2019T120233 and 2017M621198). In situ ADXRD patterns of samples under high pressure were performed at the BL15U1 beamline, Shanghai Synchrotron Radiation Facility (SSRF).

语种：英文

外文关键词：emission enhancement; high pressure; Mn-based organic-inorganic metal halides; piezochromic behavior

摘要：In the pressure-induced emission enhancement paradigms, harvesting enhanced emission on the basis of original color is still largely hampered due to the recovery or decrement of emission intensity upon decompression. Here, a pressure-treated strategy is reported to achieve the remarkable green emission enhancement of organic-inorganic metal halide (OIMH) [PP14](2)[MnBr4] (N-butyl-N-methylpiperidinium [PP14](+)) at ambient conditions. After a cycle of 1 atm to 15.2 GPa, the [PP14](2)[MnBr4] shows a 1.67-fold enhancement in the photoluminescence quantum yield from 54.5% to 90.8%, and green emission monochromaticity is unexpectedly retained. The restriction of motion freedom of [MnBr4](2-) by increased Br center dot center dot center dot H interactions is highly responsible for the intense emission. Furthermore, [PP14](2)[MnBr4] exhibits significant piezochromism that shifts from green to red, and an ultrabroad tunability of 185 nm is observed below 12.5 GPa. The enhancement of the crystal field splitting energy and the reduction of the relaxation from the low-energy excited state T-4(1) to the ground state (6)A(1) that is caused by the shrinkage of Mn-Br bond result in the red shift of emission. This work sheds light on the effects of pressure treatment in boosting emission enhancement and facilitates the design of new OIMHs with the desired emission properties.