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Barium: An Efficient Cathode Layer for Bulk-heterojunction Solar Cells
Open accessAbstract
We report Barium (Ba) cathode layer for bulk-heterojunction solar cells which enhanced the fill factor (FF) of p-DTS(FBTTh2)2/PC71BM BHJ solar cell up to 75.1%, one of the highest value reported for an organic solar cell. The external quantum efficiency exceeds 80%. Analysis of recombination mechanisms using the current-voltage (J-V) characteristics at various light intensities in the BHJ solar cell layer reveals that Ba prevents trap assisted Shockley-Read-Hall (SRH) recombination at the interface and with different thicknesses of the Ba, the recombination shifts towards bimolecular from monomolecular. Moreover, Ba increases shunt resistance and decreases the series resistance significantly. This results in an increase in the charge collection probability leading to high FF. This work identifies a new cathode interlayer which outclasses the all the reported interlayers in increasing FF leading to high power conversion efficiency and have significant implications in improving the performance of BHJ solar cells.
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Citations
Cited by
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Lin, Y., & Zhan, X. (2014) · Materials Horizons · doi:10.1039/c4mh00042k · Cited by 745
A molecular nematic liquid crystalline material for high-performance organic photovoltaics
Sun, K., Xiao, Z., Lu, S., Zajaczkowski, W., Pisula, W., Hanssen, E., White, J. M., Williamson, R. M., Subbiah, J., Ouyang, J., et al. (2015) · Nature Communications · doi:10.1038/ncomms7013 · Cited by 630
Solvent Additives: Key Morphology‐Directing Agents for Solution‐Processed Organic Solar Cells
McDowell, C., Abdelsamie, M., Toney, M. F., & Bazan, G. C. (2018) · Advanced Materials · doi:10.1002/adma.201707114 · Cited by 513
Self-citationLi, X., Pan, F., Sun, C., Zhang, M., Wang, Z., Du, J., Wang, J., Xiao, M., Xue, L., Zhang, Z.-G., et al. (2019) · Nature Communications · doi:10.1038/s41467-019-08508-3 · Cited by 308
Jung, J. W., Chueh, C., & Jen, A. K. ‐. (2015) · Advanced Energy Materials · doi:10.1002/aenm.201500486 · Cited by 256
Metadata
- Authors
- Gupta, V., Kyaw, A. K. K., Wang, D. H., Chand, S., Bazan, G. C., & Heeger, A. J.
- Venue
- Scientific Reports
- Published
- 2013-06-11
- Volume
- 3
- Issue
- 1
- Pages
- 1965-1965
- ISSN
- 2045-2322 (ISSN-L)
- OpenAlex
- W2000867047
- Cited by
- 383
- References
- 0
- FWCI
- 40.54
- Type
- journal article
- Language
- en
- Open access
- gold
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- Gupta, V., Kyaw, A. K. K., Wang, D. H., Chand, S., Bazan, G. C., & Heeger, A. J. (2013). Barium: An Efficient Cathode Layer for Bulk-heterojunction Solar Cells. Scientific Reports. https://doi.org/10.1038/srep01965
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