零维锑基有机-无机杂化氯化物的自陷态激子发光及其发光二极管  

Self-trapped Exciton Luminescence and Light-emitting-diodes Based on Zero-dimensional Organic-inorganic Hybrid Antimony Chloride

作　　者：蔡培庆 滕嵘驭 张帝 王淞 占宇鑫 王祥夫[2] 司俊杰 姚鑫 艾琦 刘祖刚 CAI Pei-qing;TENG Rong-yu;ZHANG Di;WANG Song;ZHAN Yu-xin;WANG Xiang-fu;SI Jun-jie;YAO Xin;AI Qi;LIU Zu-gang(College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310000, China;College of Electronic and Optical Engineering and College of Microelectronics, Nanjing University of Posts and Telecommunications, Nanjing 210023, China)

机构地区：[1]中国计量大学光学与电子科技学院,浙江杭州310000 [2]南京邮电大学电子与光学工程学院,微电子学院,江苏南京210023

出　　处：《发光学报》2022年第1期94-102,共9页Chinese Journal of Luminescence

基　　金：国家自然科学基金(11904345,61905230,52072355,52103241);浙江省自然科学基金(LQ19F040004)资助项目。

摘　　要：新兴的零维金属卤化物材料由于其优异的光电性能,近期引起了研究者们的特别关注。本文使用反溶剂法和旋涂法分别制备了零维金属卤化物四苯基膦氯化锑[(C_(6)H_(5))_(4)P]_(2)SbCl_(5)的发光材料和器件,通过稳态激发/发射光谱、瞬态光谱对其发光性能进行了研究。研究结果表明,在紫外光激发下,[(C_(6)H_(5))_(4)P]_(2)SbCl_(5)可以发出明亮的橙红光,这种橙红光源于零维限域作用下的自陷态激子三重态发光。变温光致发光(PL)和衰减寿命研究表明该物质具有600 meV左右的热激活能,抗热猝灭性能较强。通过优化器件结构,引入聚[双(4-苯基)(4-丁基苯基)胺](Poly-TPD)作为空穴传输层,通过混合Poly-TPD的荧光发射和[(C_(6)H_(5))_(4)P]_(2)SbCl_(5)的自陷激子发光,获得了在6 V偏压下126 cd/m^(2)的暖白光电致发光器件。本工作对溶液法加工无铅金属卤化合物电致发光器件的进程具有一定的推动作用。The emerging of the zero-dimensional metal halide materials has attracted great attention of researchers due to their excellent photoelectric properties.Herein,the luminescent material and device based on zero-dimensional metal halide tetraphenylphosphonium antimony chloride[(C_(6)H_(5))_(4)P]_(2)SbCl_(5) were prepared by anti-solvent method and spin-coating method,respectively.The optoelectronic properties of[(C_(6)H_(5))_(4)P]_(2)SbCl_(5) were investigated by excitation spectra,emission spectra,and time-resolved spectra.The results show that[(C_(6)H_(5))_(4)P]_(2)SbCl_(5) can emit bright orange-red emission under the ultraviolet excitation.This orange-red emission originates from the triplet self-trapped exciton induced by the zero-dimensional spatial confinement.Temperature dependent PL and decay lifetime studies reveal that the material has a thermal activation energy with the value of~600 meV,thus it has favorable anti-thermal quenching effect.By optimizing the device structure and introducing poly[bis(4-phenyl)(4-butylphenyl)amine](Poly-TPD)as a hole transport layer,the warm white emission by mixing the fluorescence emission of Poly-TPD and the self-trapped exciton emission of[(C_(6)H_(5))_(4)P]_(2)SbCl_(5) was obtained with a brightness of 126 cd/m^(2) under a bias of 6 V.This work provides an alternative approach for the development of the manufacture of lead-free metal halide electroluminescent devices by solution method.

关 键 词：零维发光材料 自陷态激子 电致发光 

分 类 号：O482.31[理学—固体物理] TN383.1[理学—物理]