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Importance of High‐Electron Mobility in Polymer Acceptors for Efficient All‐Polymer Solar Cells: Combined Engineering of Backbone Building Unit and Regioregularity by Soodeok Seo; Cheng Sun; Jin‐Woo Lee; Seungjin Lee; Dongchan Lee; Cheng Wang; Tan Ngoc‐Lan Phan; Geon‐U Kim; Shinuk Cho; Yun‐Hi Kim; Bumjoon J. Kim is a Engineering article available to read on EtoBox.
What is Importance of High‐Electron Mobility in Polymer Acceptors for Efficient All‐Polymer Solar Cells: Combined Engineering of Backbone Building Unit and Regioregularity about?
## Abstract The charge transport ability of polymer acceptors (P~A~s) is crucial for achieving high power conversion efficiencies (PCEs) of all‐polymer solar cells (all‐PSCs). However, the electron mobilities (μ~e~s) of most P~A~s are inferior to those of their small molecule acceptor (SMA) counterparts. Herein, the authors design a new series of the polymerized SMA‐based P~A~s (Y5‐A‐B), where the donating moiety (A = selenophene (Se)/biselenophene (BiSe)) and the backbone regioregularity (B = In/Mix/Out) are 2D controlled, for enhancing both the μ~e~ and PCEs. Interestingly, the effects of regioisomers on the μ~e~ and all‐PSC performance are the opposite depending on the donating unit. For the Y5‐Se‐based P~A~s, the PCEs increase in order of Out (7.52%) < Mix (9.33%) Mix (9.58%) > In (8.52%). These opposite trends in each series originate from the different planarity and intermolecular assembly of P~A~s depending on the regioregularity. Thus, the Y5‐Se‐In blend exhibits the highest μ~e~ and achieves the highest PCE (13.38%) among the all‐PSCs in this study. Therefore, the authors report the importance of simultaneous engineering of the backbone building unit and regioregularity
Who reads Importance of High‐Electron Mobility in Polymer Acceptors for Efficient All‐Polymer Solar Cells: Combined Engineering of Backbone Building Unit and Regioregularity?
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- Author
- Soodeok Seo; Cheng Sun; Jin‐Woo Lee; Seungjin Lee; Dongchan Lee; Cheng Wang; Tan Ngoc‐Lan Phan; Geon‐U Kim; Shinuk Cho; Yun‐Hi Kim; Bumjoon J. Kim
- Publisher
- Wiley
- Published
- 2021
- Language
- EN
- Field
- Engineering (Physical Sciences)