Reducing roll-off effect of efficient green quantum-dot light-emitting diodes via composition-gradient thick-shell quantum dots

Hoang Tuan Vu, Yan Kuin Su, Chun Yuan Huang, Hsin-Chieh Yu, Ray Kuang Chiang, Chih Jung Chen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this study, we investigated the stable and efficient quantum-dot light emitting diodes (QLEDs) under high driving current by using composition-gradient thick-shell CdSe@ZnS/ZnS QDs. Thick-shell QDs with low defective structure can effectively avoid the electron-hole pairs from nonradiative Auger recombination and prevent thermal-stress-induced expansion at high driving current. Consequently, roll-off effect in electroluminescent feature can be reduced almost two times. Moreover, the maximum current efficiency of thick-shell-device is 10.3 cd/A, which much higher than 1.57 cd/A in thin-shell-device.

Original languageEnglish
Title of host publicationProceedings of AM-FPD 2016 - 23rd International Workshop on Active-Matrix Flatpanel Displays and Devices
Subtitle of host publicationTFT Technologies and FPD Materials
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages111-112
Number of pages2
ISBN (Electronic)9784990875312
DOIs
StatePublished - 15 Aug 2016
Event23rd International Workshop on Active-Matrix Flatpanel Displays and Devices, AM-FPD 2016 - Kyoto, Japan
Duration: 6 Jul 20168 Jul 2016

Publication series

NameProceedings of AM-FPD 2016 - 23rd International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials

Conference

Conference23rd International Workshop on Active-Matrix Flatpanel Displays and Devices, AM-FPD 2016
CountryJapan
CityKyoto
Period6/07/168/07/16

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  • Cite this

    Vu, H. T., Su, Y. K., Huang, C. Y., Yu, H-C., Chiang, R. K., & Chen, C. J. (2016). Reducing roll-off effect of efficient green quantum-dot light-emitting diodes via composition-gradient thick-shell quantum dots. In Proceedings of AM-FPD 2016 - 23rd International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials (pp. 111-112). [7543635] (Proceedings of AM-FPD 2016 - 23rd International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/AM-FPD.2016.7543635