Quantifying and Understanding Voltage Losses Due to Nonradiative Recombination in Bulk Heterojunction Organic Solar Cells with Low Energetic Offsets
Abstract
Abstract Open‐circuit voltage ( V OC ) losses in organic photovoltaics (OPVs) inhibit devices from reaching V OC values comparable to the bandgap of the donor–acceptor blend. Specifically, nonradiative recombination losses (∆ V nr ) are much greater in OPVs than in silicon or perovskite solar cells, yet the origins of this are not fully understood. To understand what makes a system have high or low loss, an investigation of the nonradiative recombination losses in a total of nine blend systems is carried out. An apparent relationship is observed between the relative domain purity of six blends and the degree of nonradiative recombination loss, where films exhibiting relatively less pure domains show lower ∆ V nr than films with higher domain purity. Additionally, it is shown that when paired with a fullerene acceptor, polymer donors which have bulky backbone units to inhibit close π–π stacking exhibit lower nonradiative recombination losses than in blends where the polymer can pack more closely. This work reports a strategy that ensures ∆ V nr can be measured accurately and reports key observations on the relationship between ∆ V nr and properties of the donor/acceptor interface.
- Authors:
-
[3];
[1]
- Department of Chemistry and Biochemistry University of California, Santa Barbara Santa Barbara CA 93106 USA
- Division of Advanced Materials Korea Research Institute of Chemical Technology (KRICT) Daejeon 34114 Republic of Korea
- Department of Physics and Organic and Carbon Electronics Lab (ORaCEL) North Carolina State University Raleigh NC 27695 USA
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1525536
- Grant/Contract Number:
- DE‐AC02‐05CH11231
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Advanced Energy Materials
- Additional Journal Information:
- Journal Name: Advanced Energy Materials Journal Volume: 9 Journal Issue: 27; Journal ID: ISSN 1614-6832
- Publisher:
- Wiley Blackwell (John Wiley & Sons)
- Country of Publication:
- Germany
- Language:
- English
Citation Formats
Rosenthal, Katie D., Hughes, Michael P., Luginbuhl, Benjamin R., Ran, Niva A., Karki, Akchheta, Ko, Seo‐Jin, Hu, Huawei, Wang, Ming, Ade, Harald, and Nguyen, Thuc‐Quyen. Quantifying and Understanding Voltage Losses Due to Nonradiative Recombination in Bulk Heterojunction Organic Solar Cells with Low Energetic Offsets. Germany: N. p., 2019.
Web. doi:10.1002/aenm.201901077.
Rosenthal, Katie D., Hughes, Michael P., Luginbuhl, Benjamin R., Ran, Niva A., Karki, Akchheta, Ko, Seo‐Jin, Hu, Huawei, Wang, Ming, Ade, Harald, & Nguyen, Thuc‐Quyen. Quantifying and Understanding Voltage Losses Due to Nonradiative Recombination in Bulk Heterojunction Organic Solar Cells with Low Energetic Offsets. Germany. https://doi.org/10.1002/aenm.201901077
Rosenthal, Katie D., Hughes, Michael P., Luginbuhl, Benjamin R., Ran, Niva A., Karki, Akchheta, Ko, Seo‐Jin, Hu, Huawei, Wang, Ming, Ade, Harald, and Nguyen, Thuc‐Quyen. Tue .
"Quantifying and Understanding Voltage Losses Due to Nonradiative Recombination in Bulk Heterojunction Organic Solar Cells with Low Energetic Offsets". Germany. https://doi.org/10.1002/aenm.201901077.
@article{osti_1525536,
title = {Quantifying and Understanding Voltage Losses Due to Nonradiative Recombination in Bulk Heterojunction Organic Solar Cells with Low Energetic Offsets},
author = {Rosenthal, Katie D. and Hughes, Michael P. and Luginbuhl, Benjamin R. and Ran, Niva A. and Karki, Akchheta and Ko, Seo‐Jin and Hu, Huawei and Wang, Ming and Ade, Harald and Nguyen, Thuc‐Quyen},
abstractNote = {Abstract Open‐circuit voltage ( V OC ) losses in organic photovoltaics (OPVs) inhibit devices from reaching V OC values comparable to the bandgap of the donor–acceptor blend. Specifically, nonradiative recombination losses (∆ V nr ) are much greater in OPVs than in silicon or perovskite solar cells, yet the origins of this are not fully understood. To understand what makes a system have high or low loss, an investigation of the nonradiative recombination losses in a total of nine blend systems is carried out. An apparent relationship is observed between the relative domain purity of six blends and the degree of nonradiative recombination loss, where films exhibiting relatively less pure domains show lower ∆ V nr than films with higher domain purity. Additionally, it is shown that when paired with a fullerene acceptor, polymer donors which have bulky backbone units to inhibit close π–π stacking exhibit lower nonradiative recombination losses than in blends where the polymer can pack more closely. This work reports a strategy that ensures ∆ V nr can be measured accurately and reports key observations on the relationship between ∆ V nr and properties of the donor/acceptor interface.},
doi = {10.1002/aenm.201901077},
journal = {Advanced Energy Materials},
number = 27,
volume = 9,
place = {Germany},
year = {Tue Jun 04 00:00:00 EDT 2019},
month = {Tue Jun 04 00:00:00 EDT 2019}
}
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