Dual-function ligand surface control to achieve high efficiency and brightness perovskite quantum dots LED devices - Details

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Abstract：

Metal　halide　perovskite　quantum　dots　(QDs)　have　significant　potential　for　application　in　light-emitting　diodes　(LED)　owing　to　their　superior　optical　properties.　However,　the　dynamic　instability　of　traditional　oleic　acid/amine　ligands　has　a　considerable　impact　on　the　optical　and　chemical　properties　of　the　surface.　Additionally,　one　of　its　insulating　qualities　restricts　the　practical　application　of　electroluminescent　devices.　In　this　case,　the　dual-function　ligand　DDA-MeS　can　passivate　surface　defects　while　also　stabilizing　chelation　on　QDs　surface.　As　a　result,　the　electrical　performance　of　green　QDs-LED　devices　is　greatly　enhanced,　the　external　quantum　efficiency　is　raised　to　10.18%,　the　maximum　brightness　is　also　boosted　to　8025　cd/m2,　and　the　turn-on　voltage　is　decreased　to　2.5　V.　This　work　also　provides　a　novel　strategy　for　the　development　of　green　LED　devices　with　dual-function　ligands　that　can　be　highly　effective　and　bright.　©　2023　Elsevier　Ltd

Keyword：

Dual-function ligand High efficiency Perovskite quantum dots Surface defects

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[ 1 ] [Zhou Y.]National & Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, Fuzhou, 350108, China
[ 2 ] [Yang Z.]National & Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, Fuzhou, 350108, China
[ 3 ] [Yang Z.]Mindu Innovation Laboratory, Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, 350108, China
[ 4 ] [Huang Q.]National & Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, Fuzhou, 350108, China
[ 5 ] [Ye Y.]National & Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, Fuzhou, 350108, China
[ 6 ] [Ye B.]National & Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, Fuzhou, 350108, China
[ 7 ] [Shen Z.]National & Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, Fuzhou, 350108, China
[ 8 ] [Wu W.]National & Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, Fuzhou, 350108, China
[ 9 ] [Zeng Z.]National & Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, Fuzhou, 350108, China
[ 10 ] [Meng Z.]National & Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, Fuzhou, 350108, China
[ 11 ] [Hong H.]National & Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, Fuzhou, 350108, China
[ 12 ] [Ye S.]National & Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, Fuzhou, 350108, China
[ 13 ] [Cheng Z.]National & Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, Fuzhou, 350108, China
[ 14 ] [Lan Q.]National & Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, Fuzhou, 350108, China
[ 15 ] [Wang J.]National & Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, Fuzhou, 350108, China
[ 16 ] [Chen Y.]National & Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, Fuzhou, 350108, China
[ 17 ] [Zhang H.]National & Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, Fuzhou, 350108, China
[ 18 ] [Guo T.]National & Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, Fuzhou, 350108, China
[ 19 ] [Guo T.]Mindu Innovation Laboratory, Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, 350108, China
[ 20 ] [Li F.]National & Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, Fuzhou, 350108, China
[ 21 ] [Li F.]Mindu Innovation Laboratory, Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, 350108, China
[ 22 ] [Chen Y.]Department of Physics, School of Physics and Information Engineering, Fuzhou University, China
[ 23 ] [Weng Z.]Department of Physics, School of Physics and Information Engineering, Fuzhou University, China

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