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Photoconductivity of a Low‐Bandgap Conjugated Polymer
Abstract
The photoconductive properties of a novel low‐bandgap conjugated polymer, poly[2,6‐(4,4‐bis‐(2‐ethylhexyl)‐4 H‐cyclopenta[2,1‐b;3,4‐b′]dithiophene)‐alt‐4,7‐(2,1,3‐benzothiadiazole)], PCPDTBT, with an optical energy gap of Eg ∼ 1.5 eV, have been studied. The results of photoluminescence and photoconductivity measurements indicate efficient electron transfer from PCPDTBT to PCBM ([6,6]‐phenyl‐C61 butyric acid methyl ester, a fullerene derivative), where PCPDTBT acts as the electron donor and PCBM as the electron acceptor. Electron‐transfer facilitates charge separation and results in prolonged carrier lifetime, as observed by fast (t > 100 ps) transient photoconductivity measurements. The photoresponsivities of PCPDTBT and PCPDTBT:PCBM are comparable to those of poly(3‐hexylthiophene), P3HT, and P3HT:PCBM, respectively. Moreover, the spectral sensitivity of PCPDTBT:PCBM extends significantly deeper into the infrared, to 900 nm, than that of P3HT. The potential of PCPDTBT as a material for high‐efficiency polymer solar cells is discussed.
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Citations
Cited by
Efficiency enhancement in low-bandgap polymer solar cells by processing with alkane dithiols
Peet, J., Kim, J. Y., Coates, N. E., Ma, W. L., Moses, D., Heeger, A. J., & Bazan, G. C. (2007) · Nature Materials · doi:10.1038/nmat1928 · Cited by 3,202
Self-citationHou, J., Park, M.-H., Zhang, S., Yao, Y., Chen, L.-M., Li, J.-H., & Yang, Y. (2008) · Macromolecules · doi:10.1021/ma800820r · Cited by 760
Narrowband light detection via internal quantum efficiency manipulation of organic photodiodes
Armin, A., Jansen-van Vuuren, R. D., Kopidakis, N., Burn, P. L., & Meredith, P. (2015) · Nature Communications · doi:10.1038/ncomms7343 · Cited by 592
Eftaiha, A. F., Sun, J.-P., Hill, I. G., & Welch, G. C. (2014) · J. Mater. Chem. A · doi:10.1039/c3ta14236a · Cited by 379
Organic photovoltaics: a chemical approach
Delgado, J. L., Bouit, P.-A., Filippone, S., Herranz, M., & Martín, N. (2010) · Chemical Communications · doi:10.1039/c003088k · Cited by 373
Metadata
- Authors
- Soci, C., Hwang, I. ‐., Moses, D., Zhu, Z., Waller, D., Gaudiana, R., Brabec, C. J., & Heeger, A. J.
- Venue
- Advanced Functional Materials
- Publisher
- Wiley
- Published
- 2007-01-26
- Volume
- 17
- Issue
- 4
- Pages
- 632-636
- ISSN
- 1616-301X (ISSN-L)
- 1616-3028
- OpenAlex
- W2054863478
- Cited by
- 307
- References
- 0
- FWCI
- 27.09
- Type
- journal article
- Language
- en
- Open access
- closed
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- Soci, C., Hwang, I. ‐., Moses, D., Zhu, Z., Waller, D., Gaudiana, R., Brabec, C. J., & Heeger, A. J. (2007). Photoconductivity of a Low‐Bandgap Conjugated Polymer. Advanced Functional Materials. https://doi.org/10.1002/adfm.200600199
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