Photosensitizer-assisted direct 2D patterning and 3D printing of colloidal quantum dots  

作　　者：Wenyue Qing Yilong Si Mingfeng Cai Likuan Zhou Longjia Wu Zhengwei Hou Dan Liu Xiaoli Tian Wangyu Liu Linhan Lin Hao Zhang 

机构地区：[1]Department of Chemistry,Center for BioAnalytical Chemistry,Key Laboratory of Bioorganic Phosphorus Chemistry&Chemical Biology(Ministry of Education),Tsinghua University,Beijing 100084,China [2]TCL Research,Shenzhen 518067,China [3]Key Laboratory of Advanced Materials(MOE),School of Materials Science and Engineering,Tsinghua University,Beijing 100084,China [4]State Key Laboratory of Precision Measurement Technology and Instruments,Department of Precision Instruments,Tsinghua University,Beijing 100084,China

出　　处：《Nano Research》2024年第12期10460-10466,共7页纳米研究（英文版）

基　　金：supported by National Key Research and Development Program of China(No.2022YFB3602805)(H.Z.);the National Natural Science Foundation of China(No.22274087)(H.Z.);Tsinghua University Dushi Program(H.Z.).

摘　　要：Direct photopatterning is a powerful strategy for patterning colloidal quantum dots(QDs)for their integration in various electronic and optoelectronic devices.However,ultraviolet(UV)exposure required for QD patterning,especially those with short wavelength(e.g.,deep UV light),can degrade the photo-,and electroluminescence,and other properties of patterned QDs.Here we develop a photosensitizer-assisted approach for direct photopatterning of QDs with h-line(centered at 405 nm)UV light and better preservation of their luminescent properties.This approach uses a photosensitizer that can absorb the h-line UV light and transfer the energy to activate bisazide-based crosslinkers via Dexter energy transfer.Uniform,high-resolution(smallest feature size,2μm),and full-color patterns of red,green,and blue QD layers can be achieved.The patterned QD layers maintain up to~90%of their original photoluminescent quantum yields,comparing favorably with those(<60%)of QDs patterned without photosensitizers.We further extended the strategy to the direct three-dimensional(3D)printing of QDs.This photosensitizerassisted approach offers a new way for direct two-dimensional(2D)photopatterning and 3D printing of colloidal QDs,with implications in building high-performance QD optoelectronic devices.

关 键 词：direct photopatterning quantum dots PHOTOSENSITIZER Dexter energy transfer three-dimensional(3D)printing 

分 类 号：TN2[电子电信—物理电子学]