基于钙钛矿量子点的电致发光二极管研究进展  

Advances on perovskite quantum dot electroluminescent devices

作　　者：赵晨静 于跃 代锦飞 祖延清 吴朝新[1] Chenjing Zhao;Yue Yu;Jinfei Dai;Yanqing Zu;Zhaoxin Wu(Key Laboratory of Physics and Electronics,Ministry of Education,Shaanxi Key Laboratory of Photonics Technology for Information,School of Electronic Science and Engineering,Faculty of Telecommunications,Xi'an Jiaotong University,Xi'an 710049,China;School of Physics and Optoelectronic Engineering,Xi'an University,Xi'an 710071,China;School of Science,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]西安交通大学电子与信息学部电子科学与工程学院,陕西省信息光子技术重点实验室,电子物理与器件教育部重点实验室,西安710049 [2]西安电子科技大学物理与光电工程学院,西安710071 [3]西安交通大学理学院,西安710049

出　　处：《科学通报》2021年第17期2139-2150,共12页Chinese Science Bulletin

基　　金：国家重点研发计划(2019YFE0111900);国家自然科学基金(61875161,61705173,61805186);中国博士后科学基金(JB180504,2020M673399)资助。

摘　　要：钙钛矿量子点因其优异的光电特性,在新型显示和固态照明等领域有着广泛的应用潜力.近年来,钙钛矿量子点成为光电领域的研究热点,钙钛矿量子点发光二极管的器件效率也有了突飞猛进的发展.本文综述了基于钙钛矿量子点的电致发光器件研究进展,分析了制约钙钛矿量子点电致发光二极管效率的主要因素,并对钙钛矿量子点电致发光器件效率提升的策略进行了讨论.Perovskite materials display great potential in the optoelectronic applications and are considered as one of the most promising optoelectronic materials due to the advantages such as high color-rending index,wide color gamut,excellent charge-transport properties,adjustable band gap,high photoluminescence quantum efficiency,low manufacturing cost,and compatibility with flexible/stretchable devices.Applying perovskite QDs as phosphors in white light down-converted lightemitting diode(LED)or emitter materials in active matrix-QLEDs to obtain high efficiency and wide color gamut is significantly promising for next-generation high-definition information displays and high-quality lighting sources applications.In this paper,the evolution of device performance of perovskite QDs-based LEDs has been demonstrated.Significant enhancement of device performance has been realized through appropriate ligand choice and effective ligand exchange together with modifying device architectures.Meanwhile,numerous encouraging achievements have been achieved via inhibition of non-radiative recombination and enhancement of exciton binding energy,since the first perovskite LED was reported in 2014.Due to the quantum effect limited by space size,perovskite quantum dots have higher exciton binding energy,easily achievable high fluorescence quantum efficiency and narrow emission bandwidth.Because of the excellent photoelectric characteristics,perovskite quantum dots have a wide application potential in new display and solid state lighting.However,for the commercial applications,further efforts are required to elucidate the physical mechanisms and improve the device performance of perovskite QLEDs.Besides,the poor stability of perovskite QLEDs in ambient and harsh conditions has attracted a wide concern,and simultaneously,several strategies have been explored to circumvent this issue,including compositional engineering,surface engineering,matrix encapsulation and device encapsulation.Although significant advances have been made in this regard,

关 键 词：钙钛矿 量子点 电致发光 器件性能 

分 类 号：TN383.1[电子电信—物理电子学] TB383.1[一般工业技术—材料科学与工程]