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High operational stability of electrophosphorescent devices
Abstract
Electrophosphorescent devices with fac-tris(2-phenylpyridine)iridium as the green emitting dopant have been fabricated with a variety of hole and exciton blocking materials. A device with aluminum(III)bis(2-methyl-8-quinolinato)4-phenylphenolate (BAlq) demonstrates an efficiency of 19 cd/A with a projected operational lifetime of 10 000 h, operated at an initial brightness of 500 cd/m2; or 50 000 h normalized to 100 cd/m2. An orange-red electrophosphorescent device with iridium(III) bis(2-phenylquinolyl-N,C2′)acetylacetonate as the dopant emitter and BAlq as the hole blocker demonstrates a maximum efficiency of 17.6 cd/A with a projected operational lifetime of 5000 h at an initial brightness of 300 cd/m2; or 15 000 h normalized to 100 cd/m2. The average voltage increase for both devices is <0.3 mV/h. The device operational lifetime is found to be inversely proportional to the initial brightness, typical of fluorescent organic light emitting devices.
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Citations
Cited by
Evolution of Red Organic Light-Emitting Diodes: Materials and Devices
Chen, C.-T. (2004) · Chemistry of Materials · doi:10.1021/cm049679m · Cited by 802
You, Y., & Nam, W. (2012) · Chemical Society Reviews · doi:10.1039/c2cs35171d · Cited by 668
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
Self-citationKang, J.-W., Lee, D.-S., Park, H.-D., Park, Y.-S., Kim, J. W., Jeong, W.-I., Yoo, K.-M., Go, K., Kim, S.-H., & Kim, J.-J. (2007) · Journal of Materials Chemistry · doi:10.1039/b705741e · Cited by 82
Metadata
- Authors
- Kwong, R. C., Nugent, M. R., Michalski, L., Ngo, T., Rajan, K., Tung, Y.-J., Weaver, M. S., Zhou, T. X., Hack, M., Thompson, M. E., Forrest, S. R., & Brown, J. J.
- Venue
- Applied Physics Letters
- Publisher
- AIP Publishing
- Published
- 2002-07-01
- Volume
- 81
- Issue
- 1
- Pages
- 162-164
- ISSN
- 0003-6951 (ISSN-L)
- 1077-3118
- OpenAlex
- W2080654271
- Cited by
- 262
- References
- 0
- FWCI
- 21.73
- Type
- journal article
- Language
- en
- Open access
- closed
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- Kwong, R. C., Nugent, M. R., Michalski, L., Ngo, T., Rajan, K., Tung, Y.-J., Weaver, M. S., Zhou, T. X., Hack, M., Thompson, M. E., Forrest, S. R., & Brown, J. J. (2002). High operational stability of electrophosphorescent devices. Applied Physics Letters. https://doi.org/10.1063/1.1489503
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