Efficient cadmium-free quantum dot light-emitting diodes

Hin Wai Mo, Kentaro Harada, Hiroshi Miyazaki, Chihaya Adachi

Research output: Contribution to journalConference articlepeer-review

Abstract

By utilizing a green thermally activated delayed fluorescence (TADF) material with an appropriate device architecture, we demonstrate the performance of indium-phosphide-based red quantum dot light-emitting diodes (QLEDs) with an external quantum efficiency that exceeds 11%. The prolonged photoluminescence lifetime in the quantum dot/TADF bilayer system suggests that there exists sufficient excitonic energy transfer from the TADF molecules to the direct bandgap of the quantum dot emitters. The combination of TADF and quantum dot materials can facilitate development of highly efficient cadmium-free red/green/blue QLEDs.

Original languageEnglish
Pages (from-to)870-873
Number of pages4
JournalDigest of Technical Papers - SID International Symposium
Volume51
Issue number1
DOIs
Publication statusPublished - 2020
Event57th SID International Symposium, Seminar and Exhibition, Display Week, 2020 - Virtual, Online
Duration: Aug 3 2020Aug 7 2020

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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