文献类型：期刊文献

英文题名：Fine-Tuning Single-Source White-Light Emission from All-Inorganic Corrugated 2D Antimony-Halide Perovskite

作者：Xu, Fei[1,2];Wang, Xiang[1];Li, Yue[1];Jiang, Beng[1];Dong, Zuoru[2];Yang, Zichen[1];Kang, Jiaxing[1];Shu, Xin[1];Jiang, Zuimin[2];Hong, Feng[1];Xu, Run[3];Ma, Zhongquan[1];Chen, Teng[4];Xu, Zhan[3];Xu, Haitao[5]

机构：[1]Shanghai Univ, Shanghai Frontiers Sci Ctr Quantum & Superconduct, Shanghai Key Lab High Temp Superconductors, SHU SolarE R&D Lab,Dept Phys,Coll Sci, Shanghai 200444, Peoples R China;[2]Fudan Univ, Dept Phys, State Key Lab Surface Phys, Shanghai 200433, Peoples R China;[3]Shanghai Univ, Sch Mat Sci & Engn, Dept Elect Informat Mat, Shanghai 200444, Peoples R China;[4]Shanghai Univ, Sch Mech & Engn Sci, Shanghai Inst Appl Math & Mech, Shanghai Key Lab Mech Energy Engn, Shanghai 200444, Peoples R China;[5]Shaoxing Univ, Dept Phys, Shaoxing 312000, Peoples R China

年份：0

外文期刊名：ADVANCED OPTICAL MATERIALS

收录：SCI-EXPANDED(收录号：WOS:000811084300001)、、EI(收录号：20222412233836)、Scopus(收录号：2-s2.0-85131853694)、WOS

基金：This work was supported by the National Natural Science Foundation of China (Grant Nos. 61874070, 12175131, 61874027, 11527805, and 11905133). The authors appreciate the High Performance Computing Center of Shanghai University, and Shanghai Engineering Research Center of Intelligent Computing System (No. 19DZ2252600) for providing the computing resources and technical support.

语种：英文

外文关键词：2D perovskites; homovalent substitution; self-trapping exciton emission; white-light lighting

外文摘要：Corrugated 2D antimony-halide perovskites such as Cs3Sb2Cl9 (CSC) are promising candidates for single-source white-light emission due to their ultra-broadband spectra. However, CSC has a serious luminescence quenching phenomenon due to inadequate confinement of excitons. By the homovalent substitution of trivalent antimony cation Sb3+ by a small amount of trivalent rare earth (RE) cations RE3+, the photoluminescence intensities from high-quality Cs-3(Sb1-xREx)(2)Cl-9 (CSRC) (RE = Ce, Sm, Nd, Y, Er, etc.) films at room temperature (RT) are over two orders of magnitude higher than that of CSC film. Especially, the photoluminescence quantum yield (PLQY) for the Cs-3(Sb0.995Er0.005)(2)Cl-9 film is 9.5% at RT, which is much higher than A(3)B(2)X(9) perovskites previously reported for single-source white-light lighting. Furthermore, the Cs-3(Sb0.995Er0.005)(2)Cl-9 film exhibits an ultra-broadband emission with the full width at half maximum reaching 554 meV at RT, resulting in a "warm" white-light with the CIE coordinate (0.33, 0.46) and the correlated color temperature of 5450 K. The PLQY enhancement can be considered as the fact that a high activation energy by bandgap widening effect and Type-I-like "straddling" band alignment between Cs3Sb2Cl9 and Cs3Er2Cl9 lead to reducing nonradiative losses and increasing radiative recombination channels. Meanwhile, the spectral broadening can be considered to be attributed to strong effect of electron-phonon interaction.