摘要
Low-dimensional hybrid organic-inorganic metal halides(OIMHs)have been extensively investigated for their structural tunability and unique optoelectronic properties.However,the synthesis of highly photoluminescent lead-free OIMHs remains challenging.To address this issue,we synthesized a series of hybrid OIMHs(DETA)_(3)InCl_(6):xSb^(3+)(DETA=diethylenetriamine,x=0-15%).With Sb^(3+)doping,the photoluminescence quantum yield(PLQY)is greatly improved from 4.84%to nearly 100%.Moreover,(DETA)_(3)InCl_(6):10%Sb^(3+)single crystals exhibit strong yellow broadband emission originating from selftrapped exciton(STE)radiative recombination.Interestingly,when Sb^(3+)doping is 0.005%,the single crystal doped Sb emits white light at an excitation wavelength of 365 nm with CIE coordinates of(0.35,0.36).We also explored the effect of Sb^(3+)dopants and STE state formation by DFT calculations and ultrafast transient absorption techniques.This research provides new insights into the design of high-performance photoluminescent materials based on hybrid metal halides.
基金
supported by the National Natural Science Foundation of China(22275075)
the Natural Science Foundation of Jiangxi Province(20204BCJ22015 and 20202ACBL203001)
the Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry(20212BCD42018).
