中山大学电子与信息工程学院;广州大学化学学院;东莞理工学院电子工程与智能化学院;
量子点发光二极管(QLED)凭借其高效率、高稳定性以及优异的色纯度,在显示与照明领域备受关注,但QLED在电荷注入平衡方面仍面临挑战。探讨了不同单层空穴传输层(HTL)及双层HTL结构对QLED性能的影响,并揭示其发光机理。通过结合4,4’,4”-三(咔唑-9-基)三苯胺(TCTA)的电子阻挡能力与4,4’-环己基二[N,N-二(4-甲基苯基)苯胺](TAPC)的高空穴传输能力设计出双层HTL,相应器件具有显著的性能优势。优化后的绿色QLED在7 V电压下实现了高达115 929 cd/m~2的亮度,展现出巨大的应用潜力。进一步通过Silvaco仿真验证了器件的发光机理,结果表明双层HTL形成了阶梯式的能级结构,有效降低了空穴注入势垒,并抑制电子泄漏,从而实现了电荷平衡的优化。本研究为开发高性能的QLED提供了一种有效的方法。
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基本信息:
DOI:10.13290/j.cnki.bdtjs.2025.05.002
中图分类号:TQ422;TN312.8
引用信息:
[1]方文惠,阮钰菁,廖靖妍等.具有双层空穴传输层的高亮度QLED[J].半导体技术,2025,50(05):435-442.DOI:10.13290/j.cnki.bdtjs.2025.05.002.
基金信息:
国家自然科学基金(62375057); 广东省基础与应用基础研究基金(2023B1515120046,2022A1515140064,2024A1515012019)