Journal of Electronic Materials

, Volume 47, Issue 7, pp 4016–4021 | Cite as

High-Efficiency Polymer Solar Cells by Using Co-solvents 1-Chloronaphthalene and 1,8-Octanedithiol as Processing Additives

  • Bowen GaoEmail author
  • Jing MengEmail author


The copolymer poly-BDT-2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione (PC20BDTDPP) with the bulkier alkoxy on BDT and alkyl on DPP is widely used in organic photovoltaic cells as a potential donor material. Power conversion efficiency (PCE) of polymer solar cells fabricated withPC20BDTDPP as the electron donor blended with [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) as the electron acceptor was improved from 4.90% to 9.10% by adding 1–5% of the co-solvents (1-chloronaphthalene and 1,8-octanedithiol) as processing additives. The enhanced PCE was attributed to optimized surface morphology and packed polymer chains leading to better phase separation morphology by the solvent additive. Furthermore, owing to its very narrow band gap, the synthesized polymer demonstrates a great potential for tandem or parallel-like solar cells.


Low band gap polymer benzodithiophene diketopyrrolopyrrole solvent additive 


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This work was funded by Shandong Natural Science Foundation of China (No. ZR2017MF007) and Shandong Science and Technology Plan Project of Higher Education Institutions (No. J16LA02). Bowen Gao was also supported by Shandong Teaching Reform Research Project of Undergraduate Colleges (No. Z2016M058).


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Copyright information

© The Minerals, Metals & Materials Society 2018

Authors and Affiliations

  1. 1.School of Machinery and Architectural EngineeringTaishan UniversityTai’anPeople’s Republic of China
  2. 2.Institute of Photovoltaic Materials and Building IntegrationTaishan UniversityTai’anPeople’s Republic of China
  3. 3.Technology Department of The LibraryTaishan UniversityTai’anPeople’s Republic of China

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