Benzo[1, 2‐b:4, 5‐b′]dithiophene‐alt‐terthiophene Copolymers Containing Styryl‐Triphenylamine Side Chains: Synthesis and Photovoltaic Performance Optimization with Fullerene Acceptors. Issue 10 (16th April 2013)

• Record Type: Journal Article
• Authors: Wang, Xitian; Zhang, Zhi‐Guo; Tang, Wenli; Shen, Suling; Liu, Guo; Chi, Dan; Li, Yongfang; Wang, Jizheng
• Is Part Of: Macromolecular chemistry and physics. Volume 214:Issue 10(2013:May)
• Page Start: 1081
• Page End: 1088
• Publication Date: 2013-04-16
• Subjects: Polymers -- Periodicals; Polymerization -- Periodicals; Synthetic products -- Periodicals; Macromolecules -- Periodicals; 547.7
• DOI: 10.1002/macp.201300041
• Languages: English
• ISSNs: 1022-1352

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>A new two‐dimensional‐conjugated polymer (PBDTT3‐TPA) containing benzodithiophene (BDT) and a side chain isolation comonomer is designed and synthesized. Interestingly, <bold>PBDTT3‐TPA</bold> is compatible with higher lowest unoccupied molecular level (LUMO) acceptors of indene‐C₆₀ bisadduct (ICBA), and polymer solar cells based on <bold>PBDTT3‐TPA/</bold>ICBA show an open‐circuit voltage (<italic>V</italic>_OC) of ca. 0.80 V and a power conversion efficiency of 2.48% under AM1.5G illumination of at 100 mW cm⁻². Furthermore, the energy loss in the corresponding fullerene acceptor devices is discussed, and the increase in the observed <italic>V</italic>_OC is explained quantitatively by the up‐shifted LUMO energy of ICBA (0.17 eV) and the reduced saturation current (<italic>J</italic>_SO) in the blends.<boxed-text content-type="graphic" position="anchor" orientation="portrait"><graphic position="anchor" mimetype="image" xlink:href="ark:/27927/pgg1zvgrr5b" orientation="portrait" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /></boxed-text></p> </abstract>