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Spatially indirect excitons as primary photoexcitations in conjugated polymers
Abstract
We observe competition between picosecond photoinduced absorption and stimulated emission in poly(paraphenylenevinylene) which demonstrates that they derive from two different pathways. We conclude that the photoinduced absorption originates from nonemissive ``spatially indirect'' singlet excitons which are formed with quantum yield as high as 0.9. Previous arguments about maximum possible electroluminescence device efficiencies and about lasers in conjugated polymer films are reexamined in light of the prevalence of this species.
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Light-emitting diodes based on conjugated polymers
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Cited by
H- and J-Aggregate Behavior in Polymeric Semiconductors
Spano, F. C., & Silva, C. (2014) · Annual Review of Physical Chemistry · doi:10.1146/annurev-physchem-040513-103639 · Cited by 1,112
Schwartz, B. J. (2003) · Annual Review of Physical Chemistry · doi:10.1146/annurev.physchem.54.011002.103811 · Cited by 960
Nguyen, T.-Q., Martini, I. B., Liu, J., & Schwartz, B. J. (2000) · The Journal of Physical Chemistry B · doi:10.1021/jp993190c · Cited by 818
Measurement of absolute photoluminescence quantum efficiencies in conjugated polymers
Greenham, N. C., Samuel, I. D. W., Hayes, G. R., Phillips, R. T., Kessener, Y. A. R. R., Moratti, S. C., Holmes, A. B., & Friend, R. H. (1995) · Chemical Physics Letters · doi:10.1016/0009-2614(95)00584-q · Cited by 817
Akcelrud, L. (2003) · Progress in Polymer Science · doi:10.1016/s0079-6700(02)00140-5 · Cited by 649
Metadata
- Authors
- Yan, M., Rothberg, L. J., Papadimitrakopoulos, F., Galvin, M. E., & Miller, T. M.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 1994-02-14
- Volume
- 72
- Issue
- 7
- Pages
- 1104-1107
- ISSN
- 0031-9007 (ISSN-L)
- OpenAlex
- W2024308440
- Cited by
- 395
- References
- 8
- FWCI
- 57.59
- Type
- journal article
- Language
- en
- Open access
- closed
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- Yan, M., Rothberg, L. J., Papadimitrakopoulos, F., Galvin, M. E., & Miller, T. M. (1994). Spatially indirect excitons as primary photoexcitations in conjugated polymers. Physical Review Letters. https://doi.org/10.1103/physrevlett.72.1104
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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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