量子点
载流子
二极管
光电子学
硫吡喃
电荷(物理)
电子迁移率
蓝光
发光二极管
衍生工具(金融)
载流子寿命
化学
材料科学
物理
硅
立体化学
量子力学
金融经济学
经济
作者
Fensha Cai,Hui Zong,Meng Li,Chenguang Li,Gui Chao Huang,Jorge Pascual,Chao Liang,Zhenhuang Su,Zhe Li,Xinyu Gao,Bo Hou,Shujie Wang,Gang Zhou,Zuliang Du
出处
期刊:Nano Letters
[American Chemical Society]
日期:2024-04-16
标识
DOI:10.1021/acs.nanolett.4c00883
摘要
The performance of blue quantum dot light-emitting diodes (QLEDs) is limited by unbalanced charge injection, resulting from insufficient holes caused by low mobility or significant energy barriers. Here, we introduce an angular-shaped heteroarene based on cyclopentane[b]thiopyran (C8–SS) to modify the hole transport layer poly-N-vinylcarbazole (PVK), in blue QLEDs. C8–SS exhibits high hole mobility and conductivity due to the π···π and S···π interactions. Introducing C8–SS to PVK significantly enhanced hole mobility, increasing it by 2 orders of magnitude from 2.44 × 10–6 to 1.73 × 10–4 cm2 V–1 s–1. Benefiting from high mobility and conductivity, PVK:C8–SS-based QLEDs exhibit a low turn-on voltage (Von) of 3.2 V. More importantly, the optimized QLEDs achieve a high peak power efficiency (PE) of 7.13 lm/W, which is 2.65 times that of the control QLEDs. The as-proposed interface engineering provides a novel and effective strategy for achieving high-performance blue QLEDs in low-energy consumption lighting applications.
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