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The Role of Triplet Modulation Layer on White Organic Light-Emitting Diodes
- Authors
- Yoo, Han Kyu; Lee, Ho Won; Lee, Song Eun; Baek, Hyun Jung; Lee, Sungkyu; Hwang, Kyo Min; Kim, Young Seok; Yoon, Seung Soo; Kim, Young Kwan
- Issue Date
- Nov-2016
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Keywords
- Hybrid White Organic Light-Emitting Diodes; Triplet Modulation (TM) Layer; TM Host; Singlet-Triplet Annihilation; Efficiency Roll-Off Ratio
- Citation
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.16, no.11, pp.11603 - 11607
- Journal Title
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
- Volume
- 16
- Number
- 11
- Start Page
- 11603
- End Page
- 11607
- ISSN
- 1533-4880
- Abstract
- In this work, hybrid white organic light-emitting diodes (WOLEDs) based on a triplet modulation (TM) layer have been suggested. The co-host structure within a blue fluorescent emitting layer (EML) consists of the host and TM host materials. A set of hybrid WOLEDs was fabricated with various concentrations of TM host 0, 10, 30, 50, and 70%. The TM host triplet energy level should be lower than the host and dopant to reduce the triplet exciton population and singlet-triplet annihilation of the dopant. Hybrid WOLEDs exhibited a maximum luminous efficiency (LE), external quantum efficiency (EQE), and lifetime of 10.40 cd/A, 5.58%, and 60 h, respectively. In addition, the efficiency roll-off ratio of the LE and EQE were 17.60 and 18.54%, respectively.
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Related Researcher
- Kim, Young Kwan
- Engineering (Applied Science)