Synthesis and Photovoltaic Properties of New Multifused Anthradithiophene‐Based Narrow‐Bandgap D–A Copolymers. Issue 13 (19th May 2014)

• Record Type: Journal Article
• Authors: Liu, Qi‐Da; Peng, Rui‐Xiang; Chen, Shao‐Jie; Ai, Ling; Wang, She‐Yu; Liu, Zhi‐Yang; Ge, Zi‐Yi
• Is Part Of: Macromolecular chemistry and physics. Volume 215:Issue 13(2014:Jul.)
• Page Start: 1287
• Page End: 1296
• Publication Date: 2014-05-19
• Subjects: Polymers -- Periodicals; Polymerization -- Periodicals; Synthetic products -- Periodicals; Macromolecules -- Periodicals; 547.7
• DOI: 10.1002/macp.201400119
• Languages: English
• ISSNs: 1022-1352

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Three structurally novel donor–acceptor copolymers are synthesized and fully characterized using an anthradithiophene (ADT) derivative as the donor block. All of them exhibit broad absorption ranges and moderate hole and electron mobilities. The multifused ADT donor block makes them exhibit lower highest occupied molecular orbital (HOMO) energy levels than many reported benzodithiophene‐based polymers. Copolymer blends with [6, 6]‐phenyl C71 butyric acid methyl ester (PC<sub>71</sub>BM) as active layers are used to fabricate polymer solar cells (PSCs) and a variety of post‐treatment methods are employed to optimize the device performance. The conventional and inverted configuration devices are prepared to evaluate the photovoltaic properties. A maximum power conversion efficiency of 1.66% is achieved for the inverted‐configuration device. The improved efficiency is caused by the close energy alignment between the work function of MoO<sub>3</sub> and the HOMO energy levels of the copolymers, facilitating better charge transport and increased short‐circuit current density (<italic>J</italic><sub>sc</sub>) with the inverted devices. <boxed-text content-type="graphic" position="anchor" orientation="portrait"><graphic position="anchor" mimetype="image" xlink:href="ark:/27927/pghnnq2214" orientation="portrait" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /></boxed-text></p> </abstract>