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Nearly 100% internal phosphorescence efficiency in an organic light-emitting device
Abstract
We demonstrate very high efficiency electrophosphorescence in organic light-emitting devices employing a phosphorescent molecule doped into a wide energy gap host. Using bis(2-phenylpyridine)iridium(III) acetylacetonate [(ppy)2Ir(acac)] doped into 3-phenyl-4(1′-naphthyl)-5-phenyl-1,2,4-triazole, a maximum external quantum efficiency of (19.0±1.0)% and luminous power efficiency of (60±5) lm/W are achieved. The calculated internal quantum efficiency of (87±7)% is supported by the observed absence of thermally activated nonradiative loss in the photoluminescent efficiency of (ppy)2Ir(acac). Thus, very high external quantum efficiencies are due to the nearly 100% internal phosphorescence efficiency of (ppy)2Ir(acac) coupled with balanced hole and electron injection, and triplet exciton confinement within the light-emitting layer.
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Cited by
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Liu, Y., Li, C., Ren, Z., Yan, S., & Bryce, M. R. (2018) · Nature Reviews Materials · doi:10.1038/natrevmats.2018.20 · Cited by 1,644
Quantum Dots and Their Multimodal Applications: A Review
Bera, D., Qian, L., Tseng, T.-K., & Holloway, P. H. (2010) · Materials · doi:10.3390/ma3042260 · Cited by 1,365
Tsuboyama, A., Iwawaki, H., Furugori, M., Mukaide, T., Kamatani, J., Igawa, S., Moriyama, T., Miura, S., Takiguchi, T., Okada, S., et al. (2003) · Journal of the American Chemical Society · doi:10.1021/ja034732d · Cited by 1,312
Photosensitizers with Aggregation‐Induced Emission: Materials and Biomedical Applications
Hu, F., Xu, S., & Liu, B. (2018) · Advanced Materials · doi:10.1002/adma.201801350 · Cited by 859
Recent Developments in the Application of Phosphorescent Iridium(III) Complex Systems
Ulbricht, C., Beyer, B., Friebe, C., Winter, A., & Schubert, U. S. (2009) · Advanced Materials · doi:10.1002/adma.200803537 · Cited by 746
Metadata
- Authors
- Adachi, C., Baldo, M. A., Thompson, M. E., & Forrest, S. R.
- Venue
- Journal of Applied Physics
- Publisher
- AIP Publishing
- Published
- 2001-11-15
- Volume
- 90
- Issue
- 10
- Pages
- 5048-5051
- ISSN
- 0021-8979 (ISSN-L)
- 1089-7550
- OpenAlex
- W2051293602
- Cited by
- 3,458
- References
- 0
- FWCI
- 65.66
- Type
- journal article
- Language
- en
- Open access
- closed
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- Adachi, C., Baldo, M. A., Thompson, M. E., & Forrest, S. R. (2001). Nearly 100% internal phosphorescence efficiency in an organic light-emitting device. Journal of Applied Physics. https://doi.org/10.1063/1.1409582
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