Beyond a Linker: The Role of Photochemistry of Crosslinkers in the Direct Optical Patterning of Colloidal Nanocrystals

Shaoyong Lu, Zhong Fu, Fu Li, Kangkang Weng, Likuan Zhou, Lipeng Zhang, Yuchen Yang, Hengwei Qiu, Dan Liu, Wenyue Qing, He Ding, Xing Sheng, Menglu Chen, Xin Tang, Lian Duan, Wenyong Liu, Longjia Wu, Yixing Yang, Hao Zhang*, Jinghong Li

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

43 引用 (Scopus)

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.

源语言英语
文章编号e202202633
期刊Angewandte Chemie - International Edition
61
23
DOI
出版状态已出版 - 7 6月 2022

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