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Molecular-weight-dependent mobilities in regioregular poly(3-hexyl-thiophene) diodes
Abstract
We have investigated the transport properties in the direction perpendicular to the substrate of regioregular poly(3-hexyl-thiophene) of different molecular weights (MW) in a diode geometry. In these devices, which exhibit space-charge-limited behavior, we find that the mobility values at room temperature increase from 1.33×10−5cm2∕Vsto3.30×10−4cm2∕Vs as the MW is increased from 2.9to31.1kg∕mol. The mobility is found to be field independent for high MW films, but field dependent for the low MW films. The current–voltage characteristics of the diodes are also studied as a function of temperature from 160Kto300K. The activation energy for carrier transport, extracted from the Arrhenius plot, is found to decrease gradually from 143meVto126meV as the MW is increased.
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Cites
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
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Conjugated Polymer-Based Organic Solar Cells
Günes, S., Neugebauer, H., & Sariciftci, N. S. (2007) · Chemical Reviews · doi:10.1021/cr050149z · Cited by 6,279
Charge Transport in Organic Semiconductors
Coropceanu, V., Cornil, J., da Silva Filho, D. A., Olivier, Y., Silbey, R., & Brédas, J.-L. (2007) · Chemical Reviews · doi:10.1021/cr050140x · Cited by 4,607
Mihailetchi, V. D., Xie, H. X., de Boer, B., Koster, L. J. A., & Blom, P. W. M. (2006) · Advanced Functional Materials · doi:10.1002/adfm.200500420 · Cited by 1,283
Liang, Y., & Yu, L. (2010) · Accounts of Chemical Research · doi:10.1021/ar1000296 · Cited by 697
Dang, M. T., Hirsch, L., Wantz, G., & Wuest, J. D. (2013) · Chemical Reviews · doi:10.1021/cr300005u · Cited by 587
Metadata
- Authors
- Goh, C., Kline, R. J., McGehee, M. D., Kadnikova, E. N., & Fréchet, J. M. J.
- Venue
- Applied Physics Letters
- Publisher
- AIP Publishing
- Published
- 2005-03-18
- Volume
- 86
- Issue
- 12
- ISSN
- 0003-6951 (ISSN-L)
- 1077-3118
- OpenAlex
- W2092131169
- Cited by
- 443
- References
- 1
- FWCI
- 11.76
- Type
- journal article
- Language
- en
- Open access
- closed
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- Goh, C., Kline, R. J., McGehee, M. D., Kadnikova, E. N., & Fréchet, J. M. J. (2005). Molecular-weight-dependent mobilities in regioregular poly(3-hexyl-thiophene) diodes. Applied Physics Letters. https://doi.org/10.1063/1.1891301
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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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