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从铜化物中提高电荷平衡以实现高效的电发光

Nian Zhao¹, Jing Yan¹, Chunxue Zhuo¹

¹Key Laboratory of Flexible Electronics (KLOFE), Institute of Advanced Materials (IAM), & School of Flexible Electronics (Future Technologies), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China.

The journal of physical chemistry letters

|July 25, 2023

概括

研究人员通过修改孔注射层开发了新的铜化物发光二极管 (LED). 这一策略克服了电荷平衡问题,提高了无LED应用的设备效率.

科学领域:

材料科学材料科学材料科学
光电学是指光电子产品.
固态化学固态化学

背景情况:

铜化物提供高光发光量子效率和稳定性,使它们成为矿发光二极管 (LED) 中化物有希望的替代品.
铜化物LED的一个重大挑战是由于其浅导带和不兼容的电子传输层,实现电荷平衡,导致孔积累和非辐射重组.

研究的目的:

通过抑制孔注射来解决铜化物LED中的电荷平衡问题.
提高基于铜化物发光器件的外部量子效率 (EQE).

主要方法:

用聚乙烯胺 (PEI) 修改了聚3,4-乙烯二氧化硫):聚乙烯硫酸盐 (PEDOT:PSS) 层.
采用修改PEDOT:PSS层的铜化物LED的制造和特征.

主要成果:

这种修改有效地抑制了发射层和电子传输层之间的界面上的孔注入.
开发的铜化物LED实现了5.6%的高外部量子效率 (EQE).

结论:

通过PEI进行PEDOT:PSS修改来抑制孔注入,这是提高铜化物LED电荷平衡的有效策略.
这种方法代表了设备架构在铜化物有效电解发光的显著进步,为无照明解决方案铺平了道路.

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