The DOI matches its Crossref record; 2 of the 2 references it cites were found in a registry or an index.
Beyond Fullerenes: Design of Nonfullerene Acceptors for Efficient Organic Photovoltaics
Abstract
New electron-acceptor materials are long sought to overcome the small photovoltage, high-cost, poor photochemical stability, and other limitations of fullerene-based organic photovoltaics. However, all known nonfullerene acceptors have so far shown inferior photovoltaic properties compared to fullerene benchmark [6,6]-phenyl-C60-butyric acid methyl ester (PC60BM), and there are as yet no established design principles for realizing improved materials. Herein we report a design strategy that has produced a novel multichromophoric, large size, nonplanar three-dimensional (3D) organic molecule, DBFI-T, whose π-conjugated framework occupies space comparable to an aggregate of 9 [C60]-fullerene molecules. Comparative studies of DBFI-T with its planar monomeric analogue (BFI-P2) and PC60BM in bulk heterojunction (BHJ) solar cells, by using a common thiazolothiazole-dithienosilole copolymer donor (PSEHTT), showed that DBFI-T has superior charge photogeneration and photovoltaic properties; PSEHTT:DBFI-T solar cells combined a high short-circuit current (10.14 mA/cm(2)) with a high open-circuit voltage (0.86 V) to give a power conversion efficiency of 5.0%. The external quantum efficiency spectrum of PSEHTT:DBFI-T devices had peaks of 60-65% in the 380-620 nm range, demonstrating that both hole transfer from photoexcited DBFI-T to PSEHTT and electron transfer from photoexcited PSEHTT to DBFI-T contribute substantially to charge photogeneration. The superior charge photogeneration and electron-accepting properties of DBFI-T were further confirmed by independent Xenon-flash time-resolved microwave conductivity measurements, which correctly predict the relative magnitudes of the conversion efficiencies of the BHJ solar cells: PSEHTT:DBFI-T > PSEHTT:PC60BM > PSEHTT:BFI-P2. The results demonstrate that the large size, multichromophoric, nonplanar 3D molecular design is a promising approach to more efficient organic photovoltaic materials.
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Citations
Cites
Conjugated Polymer-Based Organic Solar Cells
Günes, S., Neugebauer, H., & Sariciftci, N. S. (2007) · Chemical Reviews · doi:10.1021/cr050149z · Cited by 6,279
Entropy of Charge Separation in Organic Photovoltaic Cells: The Benefit of Higher Dimensionality
Gregg, B. A. (2011) · The Journal of Physical Chemistry Letters · doi:10.1021/jz2012403 · Cited by 245
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
Bin, H., Zhang, Z.-G., Gao, L., Chen, S., Zhong, L., Xue, L., Yang, C., & Li, Y. (2016) · Journal of the American Chemical Society · doi:10.1021/jacs.6b01744 · Cited by 783
Molecular helices as electron acceptors in high-performance bulk heterojunction solar cells
Zhong, Y., Trinh, M. T., Chen, R., Purdum, G. E., Khlyabich, P. P., Sezen, M., Oh, S., Zhu, H., Fowler, B., Zhang, B., et al. (2015) · Nature Communications · doi:10.1038/ncomms9242 · Cited by 573
7.7% Efficient All‐Polymer Solar Cells
Hwang, Y., Courtright, B. A. E., Ferreira, A. S., Tolbert, S. H., & Jenekhe, S. A. (2015) · Advanced Materials · doi:10.1002/adma.201501604 · Cited by 432
Self-citationRecent progress in non-fullerene small molecule acceptors in organic solar cells (OSCs)
Chen, W., & Zhang, Q. (2017) · Journal of Materials Chemistry C · doi:10.1039/c6tc05066b · Cited by 407
Metadata
- Authors
- Li, H., Earmme, T., Ren, G., Saeki, A., Yoshikawa, S., Murari, N. M., Subramaniyan, S., Crane, M. J., Seki, S., & Jenekhe, S. A.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2014-09-29
- Volume
- 136
- Issue
- 41
- Pages
- 14589-14597
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2323560958
- Cited by
- 226
- References
- 2
- FWCI
- 23.35
- Type
- journal article
- Language
- en
- Open access
- closed
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