Department of Materials Science and Engineering and The Shenzhen Key Laboratory for Printed Organic Electronics Southern University of Science and Technology (SUSTech) No. 1088, Xueyuan Road Shenzhen Guangdong 518055 China
Department of Chemistry Korea University 145 Anam‐ro, Seongbuk‐gu Seoul 136–713 Republic of Korea
Australian Synchrotron ANSTO 800 Blackburn Road Clayton Victoria 3168 Australia
Department of Materials Science and Engineering Monash University Wellington Road Clayton Victoria 3800 Australia
Compared to organic solar cells based on narrow‐bandgap nonfullerene small‐molecule acceptors, the performance of all‐polymer solar cells (all‐PSCs) lags much behind due to the lack of high‐performance n‐type polymers, which should have low‐aligned frontier molecular orbital levels and narrow bandgap with broad and intense absorption extended to the near‐infrared region. Herein, two novel polymer acceptors, DCNBT‐TPC and DCNBT‐TPIC, are synthesized with ultranarrow bandgaps (ultra‐NBG) of 1.38 and 1.28 eV, respectively. When applied in transistors, both polymers show efficient charge transport with a highest electron mobility of 1.72 cm 2 V −1 s −1 obtained for DCNBT‐TPC. Blended with a polymer donor, PBDTTT‐E‐T, the resultant all‐PSCs based on DCNBT‐TPC and DCNBT‐TPIC achieve remarkable power conversion efficiencies (PCEs) of 9.26% and 10.22% with short‐circuit currents up to 19.44 and 22.52 mA cm −2 , respectively. This is the first example that a PCE of over 10% can be achieved using ultra‐NBG polymer acceptors with a photoresponse reaching 950 nm in all‐PSCs. These results demonstrate that ultra‐NBG polymer acceptors, in line with nonfullerene small‐molecule acceptors, are also available as a highly promising class of electron acceptors for maximizing device performance in all‐PSCs.
Feng, Kui, et al. "High‐Performance All‐Polymer Solar Cells Enabled by n‐Type Polymers with an Ultranarrow Bandgap Down to 1.28 eV." Advanced Materials, vol. 32, no. 30, Jun. 2020. https://doi.org/10.1002/adma.202001476
Feng, Kui, Huang, Jiachen, Zhang, Xianhe, Wu, Ziang, Shi, Shengbin, Thomsen, Lars, Tian, Yanqing, Woo, Han Young, McNeill, Christopher R., & Guo, Xugang (2020). High‐Performance All‐Polymer Solar Cells Enabled by n‐Type Polymers with an Ultranarrow Bandgap Down to 1.28 eV. Advanced Materials, 32(30). https://doi.org/10.1002/adma.202001476
Feng, Kui, Huang, Jiachen, Zhang, Xianhe, et al., "High‐Performance All‐Polymer Solar Cells Enabled by n‐Type Polymers with an Ultranarrow Bandgap Down to 1.28 eV," Advanced Materials 32, no. 30 (2020), https://doi.org/10.1002/adma.202001476
@article{osti_1632769,
author = {Feng, Kui and Huang, Jiachen and Zhang, Xianhe and Wu, Ziang and Shi, Shengbin and Thomsen, Lars and Tian, Yanqing and Woo, Han Young and McNeill, Christopher R. and Guo, Xugang},
title = {High‐Performance All‐Polymer Solar Cells Enabled by n‐Type Polymers with an Ultranarrow Bandgap Down to 1.28 eV},
annote = {Abstract Compared to organic solar cells based on narrow‐bandgap nonfullerene small‐molecule acceptors, the performance of all‐polymer solar cells (all‐PSCs) lags much behind due to the lack of high‐performance n‐type polymers, which should have low‐aligned frontier molecular orbital levels and narrow bandgap with broad and intense absorption extended to the near‐infrared region. Herein, two novel polymer acceptors, DCNBT‐TPC and DCNBT‐TPIC, are synthesized with ultranarrow bandgaps (ultra‐NBG) of 1.38 and 1.28 eV, respectively. When applied in transistors, both polymers show efficient charge transport with a highest electron mobility of 1.72 cm 2 V −1 s −1 obtained for DCNBT‐TPC. Blended with a polymer donor, PBDTTT‐E‐T, the resultant all‐PSCs based on DCNBT‐TPC and DCNBT‐TPIC achieve remarkable power conversion efficiencies (PCEs) of 9.26% and 10.22% with short‐circuit currents up to 19.44 and 22.52 mA cm −2 , respectively. This is the first example that a PCE of over 10% can be achieved using ultra‐NBG polymer acceptors with a photoresponse reaching 950 nm in all‐PSCs. These results demonstrate that ultra‐NBG polymer acceptors, in line with nonfullerene small‐molecule acceptors, are also available as a highly promising class of electron acceptors for maximizing device performance in all‐PSCs. },
doi = {10.1002/adma.202001476},
url = {https://www.osti.gov/biblio/1632769},
journal = {Advanced Materials},
issn = {ISSN 0935-9648},
number = {30},
volume = {32},
place = {Germany},
publisher = {Wiley Blackwell (John Wiley & Sons)},
year = {2020},
month = {06}}