摘要
钙钛矿量子点因其优越的光电性能(如可调节的发光、窄的发光谱线、高的量子效率以及方便制备等)成为半导体发光领域的研究热点之一.虽然钙钛矿量子点在发光二极管方面具有良好的应用前景,但要想实现其商业化,仍然面临着很多问题.首先是稳定性较差,钙钛矿量子点在光、热、空气中会发生不可逆转的降解,进而导致严重的荧光猝灭,这一缺点严重地阻碍了其在实际中的应用.铅卤钙钛矿较差的稳定性也受到了研究者的广泛关注,近年来,许多工作报道了提升钙钛矿量子点稳定性的有效方法.本文详细分析了铅卤钙钛矿量子点不稳定性的来源,包括钙钛矿结构的不稳定性以及环境应力诱导下的降解,总结了近年来关于提升钙钛矿量子点稳定性的基本方法,并提出了改善铅卤钙钛矿量子点稳定性的一些建议.
Lead halide perovskite quantum dots （PQDs） have attracted plenty of attention in light-emitting diodes （LEDs） applications owing to their tunable bandgap, narrow bandwidth, high photoluminescence quantum yields （PL QYs）, and facile fabrication. Despite applying PQDs in LEDs has found huge success, the poor stability greatly hampered their commercialization. The irreversible degradation driven by light, heat and open air leads to severely PL quenching, and then decreasing the electro-optical conversion efficiency of devices. The poor stability has attracted intense attention. Within a few years, a lot of interesting results have been published, and the reported stability of PQDs was greatly enhanced. This review describes some of the recent advances made in this area, and their applications in LED are summarized.
作者
韦祎
陈叶青
程子泳
林君
Yi Wei;Yeqing Chen;Ziyong Cheng;Jun Lin(State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China;School of Applied Physics and Materials,Wuyi University,Jiangmen 529020,China;University of Science and Technology of China,Hefei 230026,China)
出处
《中国科学：化学》
CAS
CSCD
北大核心
2018年第8期771-789,共19页
SCIENTIA SINICA Chimica
基金
国家自然科学基金(编号：51772288,51750110511,21521092)
中国科学院前沿科学重点研究项目(编号：YZDY-SSW-JSC018)
国家重点基础研究发展计划(编号：2014CB643803)
江门市创新科研团队引进资助项目
广东省基础研究及应用研究重大项目(编号：2017KZDXM083)资助
关键词
钙钛矿
量子点
提升稳定性
发光二极管
perovskite
quantum dots
enhanced stability
light-emitting diodes
