Growth Control of Quasi-two-dimensional Perovskites:Structure-dependent Exciton and Charge Behavior  

准二维钙钛矿生长控制:结构依赖的激子与电荷行为

作　　者：DONG Wei LI Jing YIN Wenxu ZHANG Xiaoyu ZHENG Weitao 董威;李静;尹文旭;张晓宇;郑伟涛(吉林大学材料科学与工程学院,汽车材料教育部重点实验室,吉林长春130012)

机构地区：[1]Key Laboratory of Automobile Materials MOE,School of Materials Science&Engineering,Jilin University,Changchun 130012,China

出　　处：《发光学报》2024年第11期1767-1781,共15页Chinese Journal of Luminescence

基　　金：国家自然科学基金(52072141,52102170)。

摘　　要：While three-dimensional perovskites have high defect tolerance and an adjustable bandgap,their charges tend to be free rather than forming excitons,making them unsuitable for use in efficient light-emitting diodes(LEDs).Rather,quasi-two-dimensional(Q-2D)perovskites offer high photoluminescence quantum yield along with the advantages of bulk perovskites,making them ideal for high-performance LEDs.In Q-2D perovskites,the structure(which includes factors like crystal orientation,phase distribution,and layer thickness)directly influences how excitons and charge carriers behave within the material.Growth control techniques,such as varying the synthesis conditions or employing methods,allow for fine-tuning the structural characteristics of these materials,which in turn affect exciton dynamics and charge transport.This review starts with a description of the basic properties of Q-2D perovskites,examines crystal growth in solution,explains how structure affects energy transfer behavior,and concludes with future directions for Q-2D perovskite LEDs.By understanding and optimizing the structure-dependent behavior,researchers can better control exciton dynamics and charge transport,which are crucial for enhancing the performance of optoelectronic devices like solar cells and LEDs.准二维钙钛矿兼具高光致发光量子效率和体钙钛矿的优势,成为高性能发光二极管(LED)的理想材料。在准二维钙钛矿中,晶体取向、相分布及层厚等结构因素直接影响材料中的激子和电荷行为。通过调整合成条件或采用不同方法的生长控制技术,可以精确调控材料的结构特性,从而影响激子动力学和电荷传输。本文综述了准二维钙钛矿的基本性质,探讨了溶液中的晶体生长,解释了结构如何影响能量传递行为,并展望了准二维钙钛矿LED的未来发展方向。通过理解和优化结构依赖行为,研究人员能更有效地控制激子动力学和电荷传输,从而提升光电器件如太阳能电池和LED的性能。

关 键 词：quasi-two-dimensional perovskites light-emitting diodes growth control energy transfer 

分 类 号：O482.31[理学—固体物理]