基于多功能苯乙基溴化铵修饰层的喷墨打印钙钛矿量子点发光二极管  

Inkjet Printed Perovskite Quantum Dot Light-emitting Diodes Based on Multifunctional Phenethylammonium Bromide Modification Layer

作　　者：陈逸群 林立华 胡海龙[1] 李福山[1] CHEN Yiqun;LIN Lihua;HU Hailong;LI Fushan(College of Physics and Information Engineering,Fuzhou University,Fuzhou 350106,China)

机构地区：[1]福州大学物理与信息工程学院,福建福州350106

出　　处：《发光学报》2024年第8期1343-1353,共11页Chinese Journal of Luminescence

基　　金：国家重点研究与发展计划(2022YFB3606500);国家自然科学基金(62075043)。

摘　　要：钙钛矿量子点(PQD)的喷墨打印技术在全彩显示应用中具有巨大潜力,但一些关键问题仍然影响其发光效率,例如不平衡的载流子注入、低质量的钙钛矿薄膜以及PQD自身的非辐射复合通道等。为解决这些问题,我们引入了界面修饰层苯乙基溴化铵(PEABr)以平衡器件的载流子传输。PEABr与钙钛矿二元溶剂(甲苯、萘)具有相似的结构,可改善PQD的印刷特性和成膜能力,并有效钝化PQD膜的Br-空位和界面缺陷。基于这一策略,成功实现了在414 cd/m^(2)亮度下,最大外量子效率(EQE)达到8.82%、电流效率(CE)达到29.15 cd/A的喷墨打印钙钛矿量子点发光二极管(PeLED),为喷墨打印技术在未来显示领域中的应用提供了有益的思路。Inkjet printing technology of perovskite quantum dots(PQD)hold great potential in full-color display applications,but several key issues still affect their efficiency,such as unbalanced charge carrier injection,low-quality perovskite films,and non-radiative recombination pathways of PQDs themselves.To address these issues,we introduce an interface improvement layer of Phenethylammonium bromide(PEABr)to balance the charge carrier transport in devices.PEABr has a similar structure to the binary solvent of perovskite(toluene,naphthalene),which can improve the printing characteristics and film-forming ability of PQDs and effectively passivate the Br-vacancies and interface defects of PQD films.Based on this strategy,we successfully achieved inkjet-printed perovskite quantum dot light-emitting diodes(PeLEDs)with a maximum external quantum efficiency(EQE)of 8.82%and a current efficiency(CE)of 29.15 cd/A at a brightness of 414 cd/m^(2),providing beneficial insights for inkjet printing technology in future display applications.

关 键 词：钙钛矿量子点 喷墨打印 电致发光器件 界面修饰 

分 类 号：TN312.8[电子电信—物理电子学]