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Vacuum-Deposited Small-Molecule Organic Solar Cells with High Power Conversion Efficiencies by Judicious Molecular Design and Device Optimization
Abstract
Three new tailor-made molecules (DPDCTB, DPDCPB, and DTDCPB) were strategically designed and convergently synthesized as donor materials for small-molecule organic solar cells. These compounds possess a donor-acceptor-acceptor molecular architecture, in which various electron-donating moieties are connected to an electron-withdrawing dicyanovinylene moiety through another electron-accepting 2,1,3-benzothiadiazole block. The molecular structures and crystal packings of DTDCPB and the previously reported DTDCTB were characterized by single-crystal X-ray crystallography. Photophysical and electrochemical properties as well as energy levels of this series of donor molecules were thoroughly investigated, affording clear structure-property relationships. By delicate manipulation of the trade-off between the photovoltage and the photocurrent via molecular structure engineering together with device optimizations, which included fine-tuning the layer thicknesses and the donor:acceptor blended ratio in the bulk heterojunction layer, vacuum-deposited hybrid planar-mixed heterojunction devices utilizing DTDCPB as the donor and C(70) as the acceptor showed the best performance with a power conversion efficiency (PCE) of 6.6 ± 0.2% (the highest PCE of 6.8%), along with an open-circuit voltage (V(oc)) of 0.93 ± 0.02 V, a short-circuit current density (J(sc)) of 13.48 ± 0.27 mA/cm(2), and a fill factor (FF) of 0.53 ± 0.02, under 1 sun (100 mW/cm(2)) AM 1.5G simulated solar illumination.
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Cites
Small molecule semiconductors for high-efficiency organic photovoltaics
Lin, Y., Li, Y., & Zhan, X. (2012) · Chemical Society Reviews · doi:10.1039/c2cs15313k · Cited by 1,751
Matsuo, Y., Sato, Y., Niinomi, T., Soga, I., Tanaka, H., & Nakamura, E. (2009) · Journal of the American Chemical Society · doi:10.1021/ja9048702 · Cited by 488
Cited by
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Darling, S. B., & You, F. (2013) · RSC Advances · doi:10.1039/c3ra42989j · Cited by 508
Self-citationEfficient Tandem and Triple-Junction Polymer Solar Cells
Li, W., Furlan, A., Hendriks, K. H., Wienk, M. M., & Janssen, R. A. J. (2013) · Journal of the American Chemical Society · doi:10.1021/ja401434x · Cited by 507
Neto, B. A. D., Lapis, A. A. M., da Silva Júnior, E. N., & Dupont, J. (2013) · European Journal of Organic Chemistry · doi:10.1002/ejoc.201201161 · Cited by 328
π-Linkage effect of push-pull-structure organic small molecules for photovoltaic application
Wu, R., Yin, L., & Li, Y. (2016) · Science China Materials · doi:10.1007/s40843-016-5050-7 · Cited by 20
Metadata
- Authors
- Chen, Y.-H., Lin, L.-Y., Lu, C.-W., Lin, F., Huang, Z.-Y., Lin, H.-W., Wang, P.-H., Liu, Y.-H., Wong, K.-T., Wen, J., Miller, D. J., & Darling, S. B.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2012-08-08
- Volume
- 134
- Issue
- 33
- Pages
- 13616-13623
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2321882837
- Cited by
- 274
- References
- 2
- FWCI
- 27.27
- Type
- journal article
- Language
- en
- Open access
- closed
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- The paper
- Chen, Y.-H., Lin, L.-Y., Lu, C.-W., Lin, F., Huang, Z.-Y., Lin, H.-W., Wang, P.-H., Liu, Y.-H., Wong, K.-T., Wen, J., Miller, D. J., & Darling, S. B. (2012). Vacuum-Deposited Small-Molecule Organic Solar Cells with High Power Conversion Efficiencies by Judicious Molecular Design and Device Optimization. Journal of the American Chemical Society. https://doi.org/10.1021/ja301872s
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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