Realizing 19.05% Efficiency Polymer Solar Cells by Progressively Improving Charge Extraction and Suppressing Charge Recombination

© 2022 Wiley-VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 34(2022), 13 vom: 15. Apr., Seite e2109516
1. Verfasser: Chong, Kaien (VerfasserIn)
Weitere Verfasser: Xu, Xiaopeng, Meng, Huifeng, Xue, Jingwei, Yu, Liyang, Ma, Wei, Peng, Qiang
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2022
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article charge extraction and recombination nonfullerene acceptors polymer solar cells ternary blends volatilizable solid additives
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520 |a Improving charge extraction and suppressing charge recombination are critically important to minimize the loss of absorbed photons and improve the device performance of polymer solar cells (PSCs). In this work, highly efficient PSCs are demonstrated by progressively improving the charge extraction and suppressing the charge recombination through the combination of side-chain engineering of new nonfullerene acceptors (NFAs), adopting ternary blends, and introducing volatilizable solid additives. The 2D side chains on BTP-Th induce a certain steric hindrance for molecular packing and phase separation, which is mitigated by fluorination of side chains on BTP-FTh. Moreover, by introducing two highly crystalline molecules as the second acceptor and volatilizable solid additive, respectively, into the BTP-FTh-based host blend, the molecular crystallinity is significantly improved and the blend morphology is finely optimized. As expected, enhanced charge extraction and suppressed charge recombination are progressively realized, contributing to the largely improved fill factor (FF) of the resultant devices. Accompanied by the enhanced open-circuit voltage (Voc ) and short-circuit current density (Jsc ), a record high power conversion efficiency (PCE) of 19.05% is realized finally 
650 4 |a Journal Article 
650 4 |a charge extraction and recombination 
650 4 |a nonfullerene acceptors 
650 4 |a polymer solar cells 
650 4 |a ternary blends 
650 4 |a volatilizable solid additives 
700 1 |a Xu, Xiaopeng  |e verfasserin  |4 aut 
700 1 |a Meng, Huifeng  |e verfasserin  |4 aut 
700 1 |a Xue, Jingwei  |e verfasserin  |4 aut 
700 1 |a Yu, Liyang  |e verfasserin  |4 aut 
700 1 |a Ma, Wei  |e verfasserin  |4 aut 
700 1 |a Peng, Qiang  |e verfasserin  |4 aut 
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773 1 8 |g volume:34  |g year:2022  |g number:13  |g day:15  |g month:04  |g pages:e2109516 
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