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9.0% power conversion efficiency from ternary all-polymer solar cells

Energy & environmental science, 2017, Vol.10 (10), p.2212 [Peer Reviewed Journal]

ISSN: 1754-5692 ;ISSN: 1754-5706 ;EISSN: 1754-5706 ;DOI: 10.1039/c7ee01858d

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  • Title:
    9.0% power conversion efficiency from ternary all-polymer solar cells
  • Author: Li, Zhaojun ; Xu, Xiaofeng ; Zhang, W. ; Meng, Xiangyi ; Genene, Z. ; Ma, W. ; Mammo, W. ; Yartsev, A. ; Andersson, Mats ; Janssen, R. A. J. ; Wang, Ergang
  • Is Part Of: Energy & environmental science, 2017, Vol.10 (10), p.2212
  • Description: Integration of a third component into a single-junction polymer solar cell (PSC) is regarded as an attractive strategy to enhance the performance of PSCs. Although binary all-polymer solar cells (all-PSCs) have recently emerged with compelling power conversion efficiencies (PCEs), the PCEs of ternary all-PSCs still lag behind those of the state-of-the-art binary all-PSCs, and the advantages of ternary systems are not fully exploited. In this work, we realize high-performance ternary all-PSCs with record-breaking PCEs of 9% and high fill factors (FF) of over 0.7 for both conventional and inverted devices. The improved photovoltaic performance benefits from the synergistic effects of extended absorption, more efficient charge generation, optimal polymer orientations and suppressed recombination losses compared to the binary all-PSCs, as evidenced by a set of experimental techniques. The results provide new insights for developing high-performance ternary all-PSCs by choosing appropriate donor and acceptor polymers to overcome limitations in absorption, by affording good miscibility, and by benefiting from charge and energy transfer mechanisms for efficient charge generation.
  • Language: English
  • Identifier: ISSN: 1754-5692
    ISSN: 1754-5706
    EISSN: 1754-5706
    DOI: 10.1039/c7ee01858d
  • Source: SWEPUB Freely available online
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