Electron-Induced Degradation in Blue Quantum-Dot Light-Emitting Diodes

Gao, Peili; Chen, Zinan; Chen, Shuming

2023-12-01

10.1002/adma.202309123

ADVANCED MATERIALS   影响因子和分区

0935-9648

1521-4095

["The poor stability of blue quantum-dot (QD) light-emitting diodes (B-QLEDs) hinders their application in displays. To improve the stability of B-QLEDs, the degradation mechanism should be revealed. Here, the degradation mechanism of B-QLEDs is investigated by monitoring the changes occurring in the QDs and the hole transport layers (HTL) during device operation, respectively. It is revealed that the accumulation of electrons within the QDs is responsible for the degradation of the devices. On the one hand, the accumulated electrons induce the detachment of oleic acid ligands, leading to permanent damage to the stability of B-QDs. On the other hand, the accumulated electrons leak into the HTL or recombine at the HTL/QDs interface, leading to the degradation of HTL. The formation of surface defects in B-QDs and the decomposition of HTL contribute to the degradation of B-QLEDs. The results reveal the strong dependence of B-QLEDs stability on the accumulated electrons, the QDs and the HTL, which can help researchers to develop effective design strategies for improving the lifespan of B-QLEDs.","It is revealed that the accumulation of electrons within the quantum-dots (QDs) is responsible for the degradation of blue quantum-dot light-emitting diodes. On the one hand, the accumulated electrons induce the detachment of oleic acid ligands, leading to permanent damage to the stability of QDs. On the other hand, the accumulated electrons leak into the hole transport layer (HTL), leading to the degradation of HTL.image"]

Blue emission degradation mechanisms electron accumulation light-emitting diodes quantum dots

SCI ; EI

英语

NI论文

第一 ; 通讯

Shenzhen Science and Technology Program["JCYJ20230807093604009","JCYJ20210324105400002"] ; null[62174075]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:001118507200001

WILEY-V C H VERLAG GMBH

20235015194634

Degradation ; Electrons ; Nanocrystals ; Organic light emitting diodes (OLED) ; Stability ; Surface defects

Semiconductor Devices and Integrated Circuits:714.2 ; Nanotechnology:761 ; Chemical Reactions:802.2 ; Crystalline Solids:933.1 ; Materials Science:951

MATERIALS SCIENCE

2-s2.0-85179373312

Web of Science

Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China

Gao, Peili,Chen, Zinan,Chen, Shuming. Electron-Induced Degradation in Blue Quantum-Dot Light-Emitting Diodes[J]. ADVANCED MATERIALS,2023,36(7).

Gao, Peili,Chen, Zinan,&Chen, Shuming.(2023).Electron-Induced Degradation in Blue Quantum-Dot Light-Emitting Diodes.ADVANCED MATERIALS,36(7).

Gao, Peili,et al."Electron-Induced Degradation in Blue Quantum-Dot Light-Emitting Diodes".ADVANCED MATERIALS 36.7(2023).