[논문]High-resolution patterning of colloidal quantum dots via non-destructive, light-driven ligand crosslinking

Yang, Jeehye; Hahm, Donghyo; Kim, Kyunghwan; Rhee, Seunghyun; Lee, Myeongjae; Kim, Seunghan; Chang, Jun Hyuk; Park, Hye Won; Lim, Jaehoon; Lee, Minkyoung; Kim, Hyeokjun; Bang, Joohee; Ahn, Hyungju; Cho, Jeong Ho; Kwak, Jeonghun; Kim, BongSoo; Lee, Changhee; Bae, Wan Ki; Kang, Moon Sung

doi:10.1038/s41467-020-16652-4

[해외논문] High-resolution patterning of colloidal quantum dots via non-destructive, light-driven ligand crosslinking 원문보기

Nature communications, v.11 no.1 = v.11, 2020년, pp.2874 -

Yang, Jeehye (Department of Chemical and Biomolecular Engineering, Sogang University, Seoul, 04107 Republic of Korea) , Hahm, Donghyo (SKKU Advanced Institute of Nanotechnology (SAINT), School of Nano Science & Technology, Sungkyunkwan University (SKKU), Suwon, 16419 Republic of Korea) , Kim, Kyunghwan (Department of Electrical and Computer Engineering, Inter-University Semiconductor Research Center, Seoul National University, Seoul, 08826 Republic of Korea) , Rhee, Seunghyun (Department of Electrical and Computer Engineering, Inter-University Semiconductor Research Center, Seoul National University, Seoul, 08826 Republic of Korea) , Lee, Myeongjae (Department of Chemistry, Korea University, Seoul, 02841 Republic of Korea) , Kim, Seunghan (Department of Chemical and Biomolecular Engineering, Sogang University, Seoul, 04107 Republic of Korea) , Chang, Jun Hyuk (SKKU Advanced Institute of Nanotechnology (SAINT), School of Nano Science & Technology, Sungkyunkwan University (SKKU), Suwon, 16419 Republic of Korea) , Park, Hye Won (Department of Chemical and Biomolecular Engineering, Sogang University, Seoul, 04107 Repub) , Lim, Jaehoon , Lee, Minkyoung , Kim, Hyeokjun , Bang, Joohee , Ahn, Hyungju , Cho, Jeong Ho , Kwak, Jeonghun , Kim, BongSoo , Lee, Changhee , Bae, Wan Ki , Kang, Moon Sung

Abstract ▼ AI-Helper

Establishing multi-colour patterning technology for colloidal quantum dots is critical for realising high-resolution displays based on the material. Here, we report a solution-based processing method to form patterns of quantum dots using a light-driven ligand crosslinker, ethane-1,2-diyl bis(4-azido-2,3,5,6-tetrafluorobenzoate). The crosslinker with two azide end groups can interlock the ligands of neighbouring quantum dots upon exposure to UV, yielding chemically robust quantum dot films. Exploiting the light-driven crosslinking process, different colour CdSe-based core-shell quantum dots can be photo-patterned; quantum dot patterns of red, green and blue primary colours with a sub-pixel size of 4 μm × 16 μm, corresponding to a resolution of >1400 pixels per inch, are demonstrated. The process is non-destructive, such that photoluminescence and electroluminescence characteristics of quantum dot films are preserved after crosslinking. We demonstrate that red crosslinked quantum dot light-emitting diodes exhibiting an external quantum efficiency as high as 14.6% can be obtained.Designing high-resolution displays based on colloidal quantum dots remains a challenge. Here, the authors demonstrate a photo-patterning method to develop CdSe-based core-shell quantum dots patterns of red, green and blue colours with diameters ranging from 7 to 20 nm and resolution of 1400 pixels per inch.

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