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Highly efficient phosphorescence from organic light-emitting devices with an exciton-block layer
Abstract
One of the keys to highly efficient phosphorescent emission in organic light-emitting devices is to confine triplet excitons generated within the emitting layer. We employ “starburst” perfluorinated phenylenes (C60F42) as a both hole- and exciton-block layer, and a hole-transport material 4,4′,4″-tri(N-carbazolyl) triphenylamine as a host for the phosphorescent dopant dye in the emitting layer. A maximum external quantum efficiency reaches to 19.2%, and keeps over 15% even at high current densities of 10–20 mA/cm2, providing several times the brightness of fluorescent tubes for lighting. The onset voltage of the electroluminescence is as low as 2.4 V and the peak power efficiency is 70–72 lm/W, promising for low-power display devices.
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Cited by
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Shirota, Y., & Kageyama, H. (2007) · Chemical Reviews · doi:10.1021/cr050143+ · Cited by 1,756
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Kulkarni, A. P., Tonzola, C. J., Babel, A., & Jenekhe, S. A. (2004) · Chemistry of Materials · doi:10.1021/cm049473l · Cited by 1,624
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Song, J., Lee, H., Jeong, E. G., Choi, K. C., & Yoo, S. (2020) · Advanced Materials · doi:10.1002/adma.201907539 · Cited by 409
New charge-carrier blocking materials for high efficiency OLEDs
Adamovich, V. I., Cordero, S. R., Djurovich, P. I., Tamayo, A., Thompson, M. E., D’Andrade, B. W., & Forrest, S. R. (2003) · Organic Electronics · doi:10.1016/j.orgel.2003.08.003 · Cited by 355
Metadata
- Authors
- Ikai, M., Tokito, S., Sakamoto, Y., Suzuki, T., & Taga, Y.
- Venue
- Applied Physics Letters
- Publisher
- AIP Publishing
- Published
- 2001-07-09
- Volume
- 79
- Issue
- 2
- Pages
- 156-158
- ISSN
- 0003-6951 (ISSN-L)
- 1077-3118
- OpenAlex
- W2066422982
- Cited by
- 784
- References
- 0
- FWCI
- 45.17
- Type
- journal article
- Language
- en
- Open access
- closed
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- Ikai, M., Tokito, S., Sakamoto, Y., Suzuki, T., & Taga, Y. (2001). Highly efficient phosphorescence from organic light-emitting devices with an exciton-block layer. Applied Physics Letters. https://doi.org/10.1063/1.1385182
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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