电致发光
纳米晶
量子点
材料科学
光致发光
纳米技术
发光二极管
卡宾
光化学
量子效率
光电子学
化学
催化作用
生物化学
图层(电子)
作者
Shaoyong Lu,Zhong Fu,Fu Li,Kangkang Weng,Likuan Zhou,Lipeng Zhang,Yuchen Yang,Hengwei Qiu,Dan Liŭ,Wenyue Qing,He Ding,Xing Sheng,Menglu Chen,Xin Tang,Lian Duan,Wenyong Liu,Longjia Wu,Yixing Yang,Hao Zhang,Jinghong Li
标识
DOI:10.1002/anie.202202633
摘要
Surface chemistry mediated direct optical patterning represents an emerging strategy for incorporating colloidal nanocrystals (NCs) in integrated optoelectronic platforms including displays and image sensors. However, the role of photochemistry of crosslinkers and other photoactive species in patterning remains elusive. Here we show the design of nitrene- and carbene-based photocrosslinkers can strongly affect the patterning capabilities and photophysical properties of NCs, especially quantum dots (QDs). Their role beyond physical linkers stems from structure-dictated electronic configuration, energy alignment and associated reaction kinetics and thermodynamics. Patterned QD layers with designed carbene-based crosslinkers fully preserve their photoluminescent and electroluminescent properties. Patterned light emitting diodes (QLEDs) show a maximum external quantum efficiency of ≈12 % and lifetime over 4800 h, among the highest for reported patterned QLEDs. These results would guide the rational design of photoactive species in NC patterning and create new possibilities in the monolithic integration of NCs in high-performance device platforms.
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