DataVXAdvanced MaterialsPaper
journal article·2022-10

Nondestructive Photopatterning of Heavy‐Metal‐Free Quantum Dots

Jeehye Yang, Myeongjae Lee, Se Young Park, Myoungjin Park, Jonghoon Kim, Niranjan Sitapure, Donghyo Hahm, Seunghyun Rhee, Daeyeon Lee, Hyunwoo Jo, Yong Hyun Jo, Jaemin Lim, Jungwook Kim, Tae Joo Shin, Doh C. Lee, Kyungwon Kwak, Joseph S. Kwon, BongSoo Kim, Wan Ki Bae, Moon Sung Kang

Advanced Materials· Volume 34· Issue 43
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Source abstract

Abstract

Abstract Electroluminescence from quantum dots (QDs) is a suitable photon source for futuristic displays offering hyper‐realistic images with free‐form factors. Accordingly, a nondestructive and scalable process capable of rendering multicolored QD patterns on a scale of several micrometers needs to be established. Here, nondestructive direct photopatterning for heavy‐metal‐free QDs is reported using branched light‐driven ligand crosslinkers (LiXers) containing multiple azide units. The branched LiXers effectively interlock QD films via photo‐crosslinking native aliphatic QD surface ligands without compromising the intrinsic optoelectronic properties of QDs. Using branched LiXers with six sterically engineered azide units, RGB QD patterns are achieved on the micrometer scale. The photo‐crosslinking process does not affect the photoluminescence and electroluminescence characteristics of QDs and extends the device lifetime. This nondestructive method can be readily adapted to industrial processes and make an immediate impact on display technologies, as it uses widely available photolithography facilities and high‐quality heavy‐metal‐free QDs with aliphatic ligands.
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Research context

Electronic materials

OpenAlex topics: Quantum Dots Synthesis And Properties · Advanced biosensing and bioanalysis techniques · Molecular Junctions and Nanostructures

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Chemical and Biomolecular Engineering Sogang University Seoul 04107 Republic of Korea

Department of Chemistry Korea University Seoul 02841 Republic of Korea

Samsung Display Research Center Samsung Display Yongin 17113 Republic of Korea

Department of Chemical Engineering Texas A&M University College Station TX 77843 USA

SKKU Advanced Institute of Nanotechnology (SAINT) School of Nano Science & Technology Sungkyunkwan University (SKKU) Suwon 16419 Republic of Korea

Division of Advanced Materials Korea Research Institute of Chemical Technology (KRICT) Daejeon 34113 Republic of Korea

Department of Chemistry Graduate School of Semiconductor Materials and Device Engineering Graduate School of Carbon Neutrality Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea

UNIST Central Research Facilities Graduate School of Semiconductor Material and Devices Engineering Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea

Department of Chemical and Biomolecular Engineering KAIST Institute for the Nanocentury Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea

Institute of Emergent Materials Sogang University Seoul 04107 Republic of Korea

Funding

National Research Foundation of Korea

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