TY - JOUR
T1 - Unraveling Device Physics of Dilute-Donor Narrow-Bandgap Organic Solar Cells with Highly Transparent Active Layers
AU - Schopp, Nora
AU - Akhtanova, Gulnur
AU - Panoy, Patchareepond
AU - Arbuz, Alexandr
AU - Chae, Sangmin
AU - Yi, Ahra
AU - Kim, Hyo Jung
AU - Promarak, Vinich
AU - Nguyen, Thuc Quyen
AU - Brus, Viktor V.
N1 - Funding Information:
This work is supported by the US Office of Naval Research (Award No. N00014‐21‐1‐2181) and the Competitive Research Grants of Nazarbayev University (Award No. 11022021FD2915 and 11022021CRP1505). N.S. acknowledges funding by the Link Foundation in form of the Link Energy Fellowship. P.P. thanks the support from the Vidyasirimedhi Institute of Science and Technology (VISTEC). The authors would like to thank Sven Peters and Robert Meyer at SENTECH Instruments GmbH for their assistance with the fitting of the spectroscopic ellipsometry data. The authors thank Alexander Mikhailovsky, Hoang‐Luong, Benjamin R. Luginbuhl, and Zhifang Du for fruitful discussions and help with the experimental device setup.
Funding Information:
This work is supported by the US Office of Naval Research (Award No. N00014-21-1-2181) and the Competitive Research Grants of Nazarbayev University (Award No. 11022021FD2915 and 11022021CRP1505). N.S. acknowledges funding by the Link Foundation in form of the Link Energy Fellowship. P.P. thanks the support from the Vidyasirimedhi Institute of Science and Technology (VISTEC). The authors would like to thank Sven Peters and Robert Meyer at SENTECH Instruments GmbH for their assistance with the fitting of the spectroscopic ellipsometry data. The authors thank Alexander Mikhailovsky, Hoang-Luong, Benjamin R. Luginbuhl, and Zhifang Du for fruitful discussions and help with the experimental device setup.
Publisher Copyright:
© 2022 Wiley-VCH GmbH.
PY - 2022/8/4
Y1 - 2022/8/4
N2 - The charge generation–recombination dynamics in three narrow-bandgap near-IR absorbing nonfullerene (NFA) based organic photovoltaic (OPV) systems with varied donor concentrations of 40%, 30%, and 20% are investigated. The dilution of the polymer donor with visible-range absorption leads to highly transparent active layers with blend average visible transmittance (AVT) values of 64%, 70%, and 77%, respectively. Opaque devices in the optimized highly reproducible device configuration comprising these transparent active layers lead to photoconversion efficiencies (PCEs) of 7.0%, 6.5%, and 4.1%. The investigation of these structures yields quantitative insights into changes in the charge generation, non-geminate charge recombination, and extraction dynamics upon dilution of the donor. Lastly, this study gives an outlook for employing the highly transparent active layers in semitransparent organic photovoltaics (ST-OPVs).
AB - The charge generation–recombination dynamics in three narrow-bandgap near-IR absorbing nonfullerene (NFA) based organic photovoltaic (OPV) systems with varied donor concentrations of 40%, 30%, and 20% are investigated. The dilution of the polymer donor with visible-range absorption leads to highly transparent active layers with blend average visible transmittance (AVT) values of 64%, 70%, and 77%, respectively. Opaque devices in the optimized highly reproducible device configuration comprising these transparent active layers lead to photoconversion efficiencies (PCEs) of 7.0%, 6.5%, and 4.1%. The investigation of these structures yields quantitative insights into changes in the charge generation, non-geminate charge recombination, and extraction dynamics upon dilution of the donor. Lastly, this study gives an outlook for employing the highly transparent active layers in semitransparent organic photovoltaics (ST-OPVs).
KW - average visible transmittance
KW - organic photovoltaics
KW - recombination studies
KW - semitransparent solar cells
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U2 - 10.1002/adma.202203796
DO - 10.1002/adma.202203796
M3 - Article
C2 - 35703912
AN - SCOPUS:85133262738
SN - 0935-9648
VL - 34
JO - Advanced Materials
JF - Advanced Materials
IS - 31
M1 - 2203796
ER -
