TY - JOUR
T1 - All-Polymer Solar Cells with over 12% Efficiency and a Small Voltage Loss Enabled by a Polymer Acceptor Based on an Extended Fused Ring Core
AU - Yao, Huatong
AU - Ma, Lik Kuen
AU - Yu, Han
AU - Yu, Jianwei
AU - Chow, Philip C.Y.
AU - Xue, Wenyue
AU - Zou, Xinhui
AU - Chen, Yuzhong
AU - Liang, Jiaen
AU - Arunagiri, Lingeswaran
AU - Gao, Feng
AU - Sun, Huiliang
AU - Zhang, Guangye
AU - Ma, Wei
AU - Yan, He
N1 - H.Y., L.M., and H.Y.. contributed equally to this work. The work described in this paper was partially supported by the National Basic Research Program of China (973 Program project numbers 2013CB834701 and 2014CB643501), the Hong Kong Research Grants Council (project numbers T23–407/13 N, N_HKUST623/13, 16305915, 16322416, and 606012), HK JEBN Limited, HKUST president's office (Project FP201), Shenzhen Technology and Innovation Commission (project number JCYJ20170413173814007, JCYJ20170818113905024), the National Key Research and Development Program of China (No. 2019YFA0705900) and the National Science Foundation of China (#21374090). The authors especially thank Hong Kong Innovation and Technology Commission for the support through projects ITC-CNERC14SC01. H.S. thanks the National Natural Science Foundation of China (NSFC, No. 21801124). P.C.Y.C. acknowledges funding from the Shenzhen Technology and Innovation Commission (project JCYJ20170818113905024) and HK-RGC (projects: 16306117, 16304218, and 16306319).
Publisher Copyright:
© 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2020/9/15
Y1 - 2020/9/15
N2 - Although the field of all-polymer solar cells (all-PSCs) has seen rapid progress in device efficiencies during the past few years, there are limited choices of polymer acceptors that exhibit strong absorption in the near-IR region and achieve high open-circuit voltage (VOC) at the same time. In this paper, an all-PSC device is demonstrated with a 12.06% efficiency based on a new polymer acceptor (named PT-IDTTIC) that exhibits strong absorption (maximum absorption coefficient: 2.41 × 105 cm−1) and a narrow optical bandgap (1.49 eV). Compared to previously reported polymer acceptors such as those based on the indacenodithiophene (IDT) core, the indacenodithienothiophene (IDTT) core has further extended fused ring, providing the polymer with extended absorption into the near-IR region and also increases the electron mobility of the polymer. By blending PT-IDTTIC with the donor polymer, PM6, a high-efficiency all-PSC is achieved with a small voltage loss of 0.52 V, without sacrificing JSC and FF, which demonstrates the great potential of high-performance all-PSCs.
AB - Although the field of all-polymer solar cells (all-PSCs) has seen rapid progress in device efficiencies during the past few years, there are limited choices of polymer acceptors that exhibit strong absorption in the near-IR region and achieve high open-circuit voltage (VOC) at the same time. In this paper, an all-PSC device is demonstrated with a 12.06% efficiency based on a new polymer acceptor (named PT-IDTTIC) that exhibits strong absorption (maximum absorption coefficient: 2.41 × 105 cm−1) and a narrow optical bandgap (1.49 eV). Compared to previously reported polymer acceptors such as those based on the indacenodithiophene (IDT) core, the indacenodithienothiophene (IDTT) core has further extended fused ring, providing the polymer with extended absorption into the near-IR region and also increases the electron mobility of the polymer. By blending PT-IDTTIC with the donor polymer, PM6, a high-efficiency all-PSC is achieved with a small voltage loss of 0.52 V, without sacrificing JSC and FF, which demonstrates the great potential of high-performance all-PSCs.
KW - all-polymer solar cells
KW - polymer acceptors
KW - voltage loss
UR - https://www.scopus.com/pages/publications/85088809368
U2 - 10.1002/aenm.202001408
DO - 10.1002/aenm.202001408
M3 - Journal article
AN - SCOPUS:85088809368
SN - 1614-6832
VL - 10
JO - Advanced Energy Materials
JF - Advanced Energy Materials
IS - 35
M1 - 2001408
ER -
SDG 7 Affordable and Clean Energy