Doping a D-A structural polymer based on benzodithiophene and triazoloquinoxaline for efficiency improvement of ternary solar cells

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• 作者：Qianqian Sun (1)
  Fujun Zhang (1)
  Jiefeng Hai (2)
  Jiangsheng Yu (2)
  Hui Huang (3)
  Feng Teng (1)
  Weihua Tang (2)
  
  1. Key Laboratory of Luminescence and Optical Information ; Ministry of Education ; Beijing Jiaotong University ; Beijing ; 100044 ; China
  2. Key Laboratory of Soft Chemistry and Functional Materials ; Ministry of Education ; Nanjing University of Science and Technology ; Nanjing ; 210094 ; China
  3. School of Electrical Engineering ; Beijing Jiaotong University ; Beijing ; 100044 ; China
  
• 关键词：polymer solar cells ; power conversion efficiency ; ternary bulk heterojunction ; atomic force microscopy
• 刊名：Electronic Materials Letters
• 出版年：2015
• 出版时间：March 2015
• 年：2015
• 卷：11
• 期：2
• 页码：236-240
• 全文大小：1,459 KB
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• 刊物类别：Chemistry and Materials Science
• 刊物主题：Condensed Matter Physics
  Electronics, Microelectronics and Instrumentation
  Optical and Electronic Materials
  Thermodynamics
  Characterization and Evaluation of Materials
  
• 出版者：The Korean Institute of Metals and Materials, co-published with Springer Netherlands
• ISSN：2093-6788

文摘

A novel donor-acceptor (D-A) structural polymer PBDT-BTzQx-C12 consisting of benzodithiophene and triazoloquinoxaline units as donor and acceptor building blocks was synthesized. The PBDT-BTzQx-C12 was evaluated as complementary electron donor in polymer solar cells (PSCs) with poly(3-hexylthiophene) (P3HT) as electron donor and [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) as electron acceptor. The power conversion efficiencies (PCEs) of PSCs were improved from 3.18% to 3.54% by doping 2 wt. % PBDT-BTzQx-C12, corresponding to an approximately 11% PCE improvement. The performance improvement of ternary PSCs should be attributed to the increase of photon harvesting and the optimized phase separation of active layers by doping D-A structural PBDT-BTzQx-C12.