Nondestructive Photopatterning of Heavy-Metal-Free Quantum Dots

Jeehye Yang; Myeongjae Lee; Se Young ParkMyoungjin ParkJonghoon KimNiranjan SitapureDonghyo HahmSeunghyun RheeDaeyeon LeeHyunwoo JoYong Hyun JoJaemin LimJungwook KimTae Joo ShinDoh C. LeeKyungwon KwakJoseph S. KwonBongSoo KimWan Ki BaeMoon Sung Kang

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Nondestructive Photopatterning of Heavy-Metal-Free Quantum Dots

机译：Nondestructive Photopatterning of Heavy-Metal-Free Quantum Dots

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Electroluminescence from quantum dots (QDs) is a suitable photon sourcefor futuristic displays offering hyper-realistic images with free-form factors.Accordingly, a nondestructive and scalable process capable of rendering multicoloredQD patterns on a scale of several micrometers needs to be established.Here, nondestructive direct photopatterning for heavy-metal-free QDsis reported using branched light-driven ligand crosslinkers (LiXers) containingmultiple azide units. The branched LiXers effectively interlock QD films viaphoto-crosslinking native aliphatic QD surface ligands without compromisingthe intrinsic optoelectronic properties of QDs. Using branched LiXers withsix sterically engineered azide units, RGB QD patterns are achieved on themicrometer scale. The photo-crosslinking process does not affect the photoluminescenceand electroluminescence characteristics of QDs and extendsthe device lifetime. This nondestructive method can be readily adapted toindustrial processes and make an immediate impact on display technologies,as it uses widely available photolithography facilities and high-quality heavymetal-free QDs with aliphatic ligands.

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《Advanced Materials》 |2022年第43期|2205504.1-2205504.11|共11页
作者
Jeehye Yang; Myeongjae Lee; Se Young ParkMyoungjin ParkJonghoon KimNiranjan SitapureDonghyo HahmSeunghyun RheeDaeyeon LeeHyunwoo JoYong Hyun JoJaemin LimJungwook KimTae Joo ShinDoh C. LeeKyungwon KwakJoseph S. KwonBongSoo KimWan Ki BaeMoon Sung Kang;
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Department of Chemical and Biomolecular EngineeringSogang UniversitySeoul 04107, Republic of Korea;

Department of ChemistryKorea UniversitySeoul 02841, Republic of Korea;

Samsung Display Research CenterSamsung DisplayYongin 17113, Republic of KoreaDepartment of Chemical and Biomolecular EngineeringSogang UniversitySeoul 04107, Republic of Korea, Samsung Display Research CenterSamsung DisplayYongin 17113, Republic of KoreaDepartment of Chemical EngineeringTexas A&M UniversityCollege Station, TX 77843, USASKKU Advanced Institute of Nanotechnology (SAINT)School of Nano Science & TechnologySungkyunkwan University (SKKU)Suwon 16419, Republic of KoreaSKKU Advanced Institute of Nanotechnology (SAINT)School of Nano Science & TechnologySungkyunkwan University (SKKU)Suwon 16419, Republic of Korea, Division of Advanced MaterialsKorea Research Institute of Chemical Technology (KRICT)Daejeon 34113, Republic Department of ChemistryGraduate School of Semiconductor Materials and Device EngineeringGraduate School of Carbon NeutralityUlsan National Institute of Science and Technology (UNIST)Ulsan 44919, Republic of KoreaUNIST Central Research FacilitiesGraduate School of Semiconductor Material and Devices EngineeringUlsan National Institute of Science and Technology (UNIST)Ulsan 44919, Republic of KoreaDepartment of Chemical and Biomolecular EngineeringKAIST Institute for the NanocenturyKorea Advanced Institute of Science and Technology (KAIST)Daejeon 34141, Republic of Korea;

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heavy-metal-free quantum dots; high-resolution patterning; ligand crosslinking; photopatterning;

Nondestructive Photopatterning of Heavy-Metal-Free Quantum Dots

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