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Title: Color-neutral, semitransparent organic photovoltaics for power window applications

Abstract

Semitransparent organic photovoltaic cells (ST-OPVs) are emerging as a solution for solar energy harvesting on building facades, rooftops, and windows. However, the trade-off between power-conversion efficiency (PCE) and the average photopic transmission (APT) in color-neutral devices limits their utility as attractive, power-generating windows. A color-neutral ST-OPV is demonstrated by using a transparent indium tin oxide (ITO) anode along with a narrow energy gap nonfullerene acceptor near-infrared (NIR) absorbing cell and outcoupling (OC) coatings on the exit surface. The device exhibits PCE = 8.1 ± 0.3% and APT = 43.3 ± 1.2% that combine to achieve a light-utilization efficiency of LUE = 3.5 ± 0.1%. Commission Internationale d’eclairage chromaticity coordinates of (0.38, 0.39), a color-rendering index of 86, and a correlated color temperature of 4,143 K are obtained for simulated AM1.5 illumination transmitted through the cell. Using an ultrathin metal anode in place of ITO, we demonstrate a slightly green-tinted ST-OPV with PCE = 10.8 ± 0.5% and APT = 45.7 ± 2.1% yielding LUE = 5.0 ± 0.3% These results indicate that ST-OPVs can combine both efficiency and color neutrality in a single device.

Authors:
ORCiD logo [1];  [2];  [3];  [1];  [4];  [3]; ORCiD logo [2]; ORCiD logo [1]
  1. University of Michigan, Ann Arbor, MI (United States)
  2. Soochow University, Jiangsu (China)
  3. North Carolina State University, Raleigh, NC (United States)
  4. SLAC National Accelerator Laboratory, Menlo Park, CA (United States)
Publication Date:
Research Org.:
Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NNSFC); Jiangsu Provincial Natural Science Foundation
OSTI Identifier:
1673042
Alternate Identifier(s):
OSTI ID: 1647873
Grant/Contract Number:  
EE0008561; AC02-05CH11231; 51773142; 51973146; BK20190099
Resource Type:
Accepted Manuscript
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Volume: 117; Journal Issue: 35; Journal ID: ISSN 0027-8424
Publisher:
National Academy of Sciences
Country of Publication:
United States
Language:
English
Subject:
Organic solar cells; semitransparent device; efficiency; non-fullerene acceptor; building integrated photovoltaics

Citation Formats

Li, Yongxi, Guo, Xia, Peng, Zhengxing, Qu, Boning, Yan, Hongping, Ade, Harald, Zhang, Maojie, and Forrest, Stephen R. Color-neutral, semitransparent organic photovoltaics for power window applications. United States: N. p., 2020. Web. doi:10.1073/pnas.2007799117.
Li, Yongxi, Guo, Xia, Peng, Zhengxing, Qu, Boning, Yan, Hongping, Ade, Harald, Zhang, Maojie, & Forrest, Stephen R. Color-neutral, semitransparent organic photovoltaics for power window applications. United States. doi:10.1073/pnas.2007799117.
Li, Yongxi, Guo, Xia, Peng, Zhengxing, Qu, Boning, Yan, Hongping, Ade, Harald, Zhang, Maojie, and Forrest, Stephen R. Mon . "Color-neutral, semitransparent organic photovoltaics for power window applications". United States. doi:10.1073/pnas.2007799117.
@article{osti_1673042,
title = {Color-neutral, semitransparent organic photovoltaics for power window applications},
author = {Li, Yongxi and Guo, Xia and Peng, Zhengxing and Qu, Boning and Yan, Hongping and Ade, Harald and Zhang, Maojie and Forrest, Stephen R.},
abstractNote = {Semitransparent organic photovoltaic cells (ST-OPVs) are emerging as a solution for solar energy harvesting on building facades, rooftops, and windows. However, the trade-off between power-conversion efficiency (PCE) and the average photopic transmission (APT) in color-neutral devices limits their utility as attractive, power-generating windows. A color-neutral ST-OPV is demonstrated by using a transparent indium tin oxide (ITO) anode along with a narrow energy gap nonfullerene acceptor near-infrared (NIR) absorbing cell and outcoupling (OC) coatings on the exit surface. The device exhibits PCE = 8.1 ± 0.3% and APT = 43.3 ± 1.2% that combine to achieve a light-utilization efficiency of LUE = 3.5 ± 0.1%. Commission Internationale d’eclairage chromaticity coordinates of (0.38, 0.39), a color-rendering index of 86, and a correlated color temperature of 4,143 K are obtained for simulated AM1.5 illumination transmitted through the cell. Using an ultrathin metal anode in place of ITO, we demonstrate a slightly green-tinted ST-OPV with PCE = 10.8 ± 0.5% and APT = 45.7 ± 2.1% yielding LUE = 5.0 ± 0.3% These results indicate that ST-OPVs can combine both efficiency and color neutrality in a single device.},
doi = {10.1073/pnas.2007799117},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 35,
volume = 117,
place = {United States},
year = {2020},
month = {8}
}

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