High efficiency, high color rendering index white organic light-emitting diodes based on thermally activated delayed fluorescence materials
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
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Original language | English |
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Article number | 263302 |
Journal / Publication | Applied Physics Letters |
Volume | 115 |
Issue number | 26 |
Online published | 26 Dec 2019 |
Publication status | Published - Dec 2019 |
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DOI | DOI |
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Link to Scopus | https://www.scopus.com/record/display.uri?eid=2-s2.0-85077514518&origin=recordpage |
Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(bf616996-90e7-4c13-8c39-6847dffc396b).html |
Abstract
High efficiency white organic light-emitting diodes (WOLEDs) with simple device architecture are desirable for next-generation light sources. However, it is still challenging in the construction of high-performance WOLEDs with a simple device structure. Based on a thermally activated delayed fluorescence (TADF) blue emitter 2SPAc-MPM and a TADF yellow emitter TXO-TPA, high performance two-color WOLEDs with simple device architecture are demonstrated. Benefiting from efficient energy transfer and wide coverage over the visible spectrum, optimized WOLED devices that have a single emitting layer (s-EML) provide a maximum color rendering index (CRI) and maximum external quantum efficiency (EQE) of 78.1 and 21.8%, respectively. More importantly, with multiple emitting layers (m-EMLs), a maximum EQE of 14.5% and a high CRI of 90.7 can be achieved. These results are among the best for the two-color WOLEDs with two TADF emitters.
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Citation Format(s)
High efficiency, high color rendering index white organic light-emitting diodes based on thermally activated delayed fluorescence materials. / Li, Zhiyi; Li, Bowen; Wei, Xiaofang et al.
In: Applied Physics Letters, Vol. 115, No. 26, 263302, 12.2019.Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
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