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Hole mobility of N,N′-bis(naphthalen-1-yl)-N,N′-bis(phenyl) benzidine investigated by using space-charge-limited currents
Abstract
The hole mobility of N,N′-bis(naphthalen-1-yl)-N,N′-bis(phenyl)-benzidine (NPB) at various thicknesses (50–1000nm) has been estimated by using space-charge-limited current measurements. A thin layer of buckminsterfullerene has been used for a quasi-Ohmic contact between NPB and indium tin oxide. The mobility at bulk property dominant thickness is in excellent agreement with the results from time-of-flight method. For the typical thickness of organic light-emitting devices, the hole mobility of NPB, 1.63×10−5cm2∕Vs, at 50nm is smaller than the value 7.64×10−4cm2∕Vs at 1000nm (electric field at 0.1MV∕cm). The authors suggest that the lower mobility is caused by the interfacial trap states.
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Cites
Highly efficient phosphorescent emission from organic electroluminescent devices
Baldo, M. A., O'Brien, D. F., You, Y., Shoustikov, A., Sibley, S., Thompson, M. E., & Forrest, S. R. (1998) · Nature · doi:10.1038/25954 · Cited by 7,204
Organic electroluminescent devices with improved stability
Slyke, S. A. V., Chen, C. H., & Tang, C. W. (1996) · Applied Physics Letters · doi:10.1063/1.117151 · Cited by 1,426
Electrical characteristics and efficiency of single-layer organic light-emitting diodes
Malliaras, G. G., Salem, J. R., Brock, P. J., & Scott, C. (1998) · Physical Review B · doi:10.1103/physrevb.58.r13411 · Cited by 663
Nondispersive electron transport in Alq3
Malliaras, G. G., Shen, Y., Dunlap, D. H., Murata, H., & Kafafi, Z. H. (2001) · Applied Physics Letters · doi:10.1063/1.1410343 · Cited by 158
Yasuda, T., Yamaguchi, Y., Zou, D., & Tsutsui, T. (2002) · Japanese Journal of Applied Physics · doi:10.1143/jjap.41.5626 · Cited by 125
Cited by
Cui, C., Wong, W.-Y., & Li, Y. (2014) · Energy Environ. Sci. · doi:10.1039/c4ee00446a · Cited by 508
Metadata
- Authors
- Chu, T.-Y., & Song, O.-K.
- Venue
- Applied Physics Letters
- Publisher
- AIP Publishing
- Published
- 2007-05-14
- Volume
- 90
- Issue
- 20
- ISSN
- 0003-6951 (ISSN-L)
- 1077-3118
- OpenAlex
- W1502378722
- Cited by
- 270
- References
- 5
- FWCI
- 15.12
- Type
- journal article
- Language
- en
- Open access
- closed
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- Chu, T.-Y., & Song, O.-K. (2007). Hole mobility of N,N′-bis(naphthalen-1-yl)-N,N′-bis(phenyl) benzidine investigated by using space-charge-limited currents. Applied Physics Letters. https://doi.org/10.1063/1.2741055
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