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Charge generation and transport in efficient organic bulk heterojunction solar cells with a perylene acceptor
Abstract
The origin of high current density in efficient non-fullerene based bulk heterojunction (BHJ) organic solar cells employing a non-planar perylene dimer (TP) as an electron acceptor and a thiophene based donor polymer PBDTTT-CT is investigated using electrical and optical techniques. Photoluminescence measurements reveal almost complete quenching of both the donor and acceptor excitons, indicating efficient electron and hole transfer processes. The nanomorphology of the films shows fine mixing of the donor polymer and TP at 50 : 50% weight ratio with a photon to current conversion efficiency (IPCE) of 45% in the visible regime. At the donor–acceptor interface, both polymer and TP excitons undergo fast dissociation with similar time scales of a few picoseconds. The magnitude of the polaron yield of PBDTTT-CT:TP blends is observed to be comparable to that of PBDTTT-CT:PC70BM blends and exhibits similar μs-decay dynamics. A power conversion efficiency of 3.2% is achieved for devices with 50 : 50% by weight compositional ratio of polymer and TP.
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Cited by
Non-fullerene acceptors for organic solar cells
Yan, C., Barlow, S., Wang, Z., Yan, H., Jen, A. K.-Y., Marder, S. R., & Zhan, X. (2018) · Nature Reviews Materials · doi:10.1038/natrevmats.2018.3 · Cited by 2,710
Wadsworth, A., Moser, M., Marks, A., Little, M. S., Gasparini, N., Brabec, C. J., Baran, D., & McCulloch, I. (2019) · Chemical Society Reviews · doi:10.1039/c7cs00892a · Cited by 986
Fused Nonacyclic Electron Acceptors for Efficient Polymer Solar Cells
Dai, S., Zhao, F., Zhang, Q., Lau, T.-K., Li, T., Liu, K., Ling, Q., Wang, C., Lu, X., You, W., et al. (2017) · Journal of the American Chemical Society · doi:10.1021/jacs.6b12755 · Cited by 864
Non-fullerene acceptors for organic photovoltaics: an emerging horizon
Lin, Y., & Zhan, X. (2014) · Materials Horizons · doi:10.1039/c4mh00042k · Cited by 745
Single‐Junction Binary‐Blend Nonfullerene Polymer Solar Cells with 12.1% Efficiency
Zhao, F., Dai, S., Wu, Y., Zhang, Q., Wang, J., Jiang, L., Ling, Q., Wei, Z., Ma, W., You, W., et al. (2017) · Advanced Materials · doi:10.1002/adma.201700144 · Cited by 699
Metadata
- Authors
- Shivanna, R., Shoaee, S., Dimitrov, S., Kandappa, S. K., Rajaram, S., Durrant, J. R., & Narayan, K. S.
- Venue
- Energy Environ. Sci.
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2014
- Volume
- 7
- Issue
- 1
- Pages
- 435-441
- ISSN
- 1754-5692 (ISSN-L)
- 1754-5706
- OpenAlex
- W2118565885
- Cited by
- 224
- References
- 0
- FWCI
- 23.57
- Type
- journal article
- Language
- en
- Open access
- closed
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- Shivanna, R., Shoaee, S., Dimitrov, S., Kandappa, S. K., Rajaram, S., Durrant, J. R., & Narayan, K. S. (2014). Charge generation and transport in efficient organic bulk heterojunction solar cells with a perylene acceptor. Energy Environ. Sci. https://doi.org/10.1039/c3ee42484g
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