Molecular insights into photostability of fluorinated organic photovoltaic blends: role of fullerene electron affinity and donor–acceptor miscibility
Abstract
In this report, the photostability of certain organic photovoltaic (OPV) active layers was demonstrated to improve by as much as a factor of five under white light illumination in air with the use of 1,7-bis-trifluoromethylfullerene (C60(CF3)2) as the acceptor in place of PC60BM. However, the results were highly dependent on the structure and functionality within the donor material. Twelve combinations of active layer blends were studied, comprised of six different high-performance donor polymers (two fluorinated and four non-fluorinated donors) and two fullerene acceptors (PC60BM and C60(CF3)2). The relative rates of irreversible photobleaching of the active layer blends were found to correlate well with the electron affinity of the fullerene when the polymer and fullerene were well blended, but a full rationalization of the photobleaching data requires consideration of both the electron affinity of the fullerene as well as the relative miscibility of the polymer–fullerene components in the blend. Miscibility of those components was probed using a combination of time-resolved photoluminescence (TRPL) measurements and scanning tunneling microscopy (STM) imaging. The presence of fluorinated aromatic units in the donor materials tend to promote more intimate mixing with C60(CF3)2 as compared to PC60BM. The full results of these photobleaching studies and measurements ofmore »
- Authors:
-
[1];
[4];
[4];
[2];
[1];
[1];
[4]
- Colorado State Univ., Fort Collins, CO (United States)
- Indian Association for the Cultivation of Science, Kolkata (India)
- Indian Inst. of Science, Bangalore (India)
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Publication Date:
- Research Org.:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1726020
- Alternate Identifier(s):
- OSTI ID: 1668111
- Report Number(s):
- NREL/JA-5900-77221
Journal ID: ISSN 2398-4902; MainId:26167;UUID:280861c9-4f53-4ade-b2e4-06c31b2f2d94;MainAdminID:14045
- Grant/Contract Number:
- AC36-08GO28308
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Sustainable Energy & Fuels
- Additional Journal Information:
- Journal Volume: 4; Journal Issue: 11; Journal ID: ISSN 2398-4902
- Publisher:
- Royal Society of Chemistry
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; fluorinated; acceptor miscibility; photostability; photovoltaic blends
Citation Formats
Brook, Colin P., Paul, Goutam, Viswanathan, Vinila Nellissery, Satyanarayana, Sandeep, Panidhara, Kumar M., Larson, Bryon W., Ferguson, Andrew J., Pal, Amlan J., Ramamurthy, Praveen C., Strauss, Steven H., Boltalina, Olga V., and Braunecker, Wade A. Molecular insights into photostability of fluorinated organic photovoltaic blends: role of fullerene electron affinity and donor–acceptor miscibility. United States: N. p., 2020.
Web. doi:10.1039/d0se00971g.
Brook, Colin P., Paul, Goutam, Viswanathan, Vinila Nellissery, Satyanarayana, Sandeep, Panidhara, Kumar M., Larson, Bryon W., Ferguson, Andrew J., Pal, Amlan J., Ramamurthy, Praveen C., Strauss, Steven H., Boltalina, Olga V., & Braunecker, Wade A. Molecular insights into photostability of fluorinated organic photovoltaic blends: role of fullerene electron affinity and donor–acceptor miscibility. United States. https://doi.org/10.1039/d0se00971g
Brook, Colin P., Paul, Goutam, Viswanathan, Vinila Nellissery, Satyanarayana, Sandeep, Panidhara, Kumar M., Larson, Bryon W., Ferguson, Andrew J., Pal, Amlan J., Ramamurthy, Praveen C., Strauss, Steven H., Boltalina, Olga V., and Braunecker, Wade A. Fri .
"Molecular insights into photostability of fluorinated organic photovoltaic blends: role of fullerene electron affinity and donor–acceptor miscibility". United States. https://doi.org/10.1039/d0se00971g. https://www.osti.gov/servlets/purl/1726020.
@article{osti_1726020,
title = {Molecular insights into photostability of fluorinated organic photovoltaic blends: role of fullerene electron affinity and donor–acceptor miscibility},
author = {Brook, Colin P. and Paul, Goutam and Viswanathan, Vinila Nellissery and Satyanarayana, Sandeep and Panidhara, Kumar M. and Larson, Bryon W. and Ferguson, Andrew J. and Pal, Amlan J. and Ramamurthy, Praveen C. and Strauss, Steven H. and Boltalina, Olga V. and Braunecker, Wade A.},
abstractNote = {In this report, the photostability of certain organic photovoltaic (OPV) active layers was demonstrated to improve by as much as a factor of five under white light illumination in air with the use of 1,7-bis-trifluoromethylfullerene (C60(CF3)2) as the acceptor in place of PC60BM. However, the results were highly dependent on the structure and functionality within the donor material. Twelve combinations of active layer blends were studied, comprised of six different high-performance donor polymers (two fluorinated and four non-fluorinated donors) and two fullerene acceptors (PC60BM and C60(CF3)2). The relative rates of irreversible photobleaching of the active layer blends were found to correlate well with the electron affinity of the fullerene when the polymer and fullerene were well blended, but a full rationalization of the photobleaching data requires consideration of both the electron affinity of the fullerene as well as the relative miscibility of the polymer–fullerene components in the blend. Miscibility of those components was probed using a combination of time-resolved photoluminescence (TRPL) measurements and scanning tunneling microscopy (STM) imaging. The presence of fluorinated aromatic units in the donor materials tend to promote more intimate mixing with C60(CF3)2 as compared to PC60BM. The full results of these photobleaching studies and measurements of donor–acceptor miscibility, considered alongside additional photoconductance measurements and preliminary device work, provide new molecular optimization insights for improving the long-term stability of OPV active layers.},
doi = {10.1039/d0se00971g},
journal = {Sustainable Energy & Fuels},
number = 11,
volume = 4,
place = {United States},
year = {Fri Sep 25 00:00:00 EDT 2020},
month = {Fri Sep 25 00:00:00 EDT 2020}
}
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