Benzodithiophene‐Based Broad Absorbing Random Copolymers Incorporating Weak and Strong Electron Accepting Imide and Lactam Functionalized Pyrrolo[3, 4‐c]pyrrole Derivatives for Polymer Solar Cells. Issue 9 (16th March 2015)

• Record Type: Journal Article
• Authors: Tamilavan, Vellaiappillai; Roh, Kyung Hwan; Agneeswari, Rajalingam; Lee, Dal Yong; Cho, Shinuk; Jin, Youngeup; Park, Sung Heum; Hyun, Myung Ho
• Is Part Of: Macromolecular chemistry and physics. Volume 216:Issue 9(2015:May)
• Page Start: 996
• Page End: 1007
• Publication Date: 2015-03-16
• Subjects: Polymers -- Periodicals; Polymerization -- Periodicals; Synthetic products -- Periodicals; Macromolecules -- Periodicals; 547.7
• DOI: 10.1002/macp.201400614
• Languages: English
• ISSNs: 1022-1352

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Two benzodithiophene (BDT)‐based broad absorbing low band gap random copolymers, <bold>P1</bold> and <bold>P2</bold>, incorporating electron accepting imide functionalized pyrrolo[3, 4‐c]pyrrole‐1, 3‐dione (TDPPDT) and lactam functionalized pyrrolo[3, 4‐c]pyrrole‐1, 4‐dione (DKPP) derivatives are prepared. The copolymerization of differently alkylated two TDPPDT derivatives with both of BDT and DKPP offers random copolymers <bold>P1</bold> and <bold>P2</bold>. The absorption bands of polymers <bold>P1</bold> and <bold>P2</bold> cover the region from 300 to 900 nm and the estimated band gaps of <bold>P1</bold> and <bold>P2</bold> are 1.43 and 1.39 eV, respectively. The highest occupied molecular orbital energy levels of <bold>P1</bold> and <bold>P2</bold> are identical, at –5.25 eV. The organic field effect transistors made from <bold>P1</bold> and <bold>P2</bold> provide a hole mobility <italic>μ</italic> of 3.0 × 10⁻⁴ and 3.6 × 10⁻⁵ cm² V⁻¹ s⁻¹, respectively. Polymer solar cells (PSCs) prepared from <bold>P1</bold> and <bold>P2</bold> afford a maximum power conversion efficiency of 1.64% and 2.14%, respectively. <graphic position="anchor" mimetype="image" xlink:href="ark:/27927/pgjkt4bxm2" orientation="portrait" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /></p> </abstract>