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Efficient photon harvesting at high optical intensities in ultrathin organic double-heterostructure photovoltaic diodes
Abstract
We demonstrate a method for efficient photon harvesting in organic thin films, thereby increasing the efficiency of organic photovoltaic cells. By incorporating an exciton-blocking layer (EBL) inserted between the photoactive organic layers and the metal cathode, we achieved an external power conversion efficiency of 2.4%±0.3% in vacuum-deposited ultrathin organic bilayer photovoltaic (PV) cells employed in a simple light trapping geometry. Ultrathin (∼100 Å) cells incorporating the transparent, conductive EBL have an internal quantum efficiency as high as 33%±4% over a spectral region matched to the solar spectrum. The very thin organic layers have a low series resistance, allowing for efficient power conversion in organic PV cells under intense (>15 suns) AM1.5 illumination. This device structure demonstrates that control of exciton diffusion in solid-state organic devices leads to a significant increase in the photon-to-carrier conversion efficiency.
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Citations
Cited by
Small molecular weight organic thin-film photodetectors and solar cells
Peumans, P., Yakimov, A., & Forrest, S. R. (2003) · Journal of Applied Physics · doi:10.1063/1.1534621 · Cited by 2,731
Self-citationCharge Photogeneration in Organic Solar Cells
Clarke, T. M., & Durrant, J. R. (2010) · Chemical Reviews · doi:10.1021/cr900271s · Cited by 2,372
Charge Carrier Transporting Molecular Materials and Their Applications in Devices
Shirota, Y., & Kageyama, H. (2007) · Chemical Reviews · doi:10.1021/cr050143+ · Cited by 1,756
Organic photonics for communications
Clark, J., & Lanzani, G. (2010) · Nature Photonics · doi:10.1038/nphoton.2010.160 · Cited by 823
Near-infrared phosphorescence: materials and applications
Xiang, H., Cheng, J., Ma, X., Zhou, X., & Chruma, J. J. (2013) · Chemical Society Reviews · doi:10.1039/c3cs60029g · Cited by 720
Metadata
- Authors
- Peumans, P., Bulović, V., & Forrest, S. R.
- Venue
- Applied Physics Letters
- Publisher
- AIP Publishing
- Published
- 2000-05-08
- Volume
- 76
- Issue
- 19
- Pages
- 2650-2652
- ISSN
- 0003-6951 (ISSN-L)
- 1077-3118
- OpenAlex
- W2032998258
- Cited by
- 647
- References
- 0
- FWCI
- 18.19
- Type
- journal article
- Language
- en
- Open access
- closed
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- Peumans, P., Bulović, V., & Forrest, S. R. (2000). Efficient photon harvesting at high optical intensities in ultrathin organic double-heterostructure photovoltaic diodes. Applied Physics Letters. https://doi.org/10.1063/1.126433
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