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Title: Efficient Thick-Film Polymer Solar Cells with Enhanced Fill Factors via Increased Fullerene Loading

Abstract

Developing effective methods to make efficient bulk-heterojunction polymer solar cells at roll-to-roll relevant active layer thickness is of significant importance. We investigate the effect of fullerene content in polymer:fullerene blends on the fill factor (FF) and on the performance of thick-film solar cells for four different donor polymers PTB7-Th, PDPP-TPT, BDT-FBT-2T, and poly[5,5'-bis(2-butyloctyl)-(2,2'-bithiophene)-4,4'-dicarboxylate-alt-5,5'-2,2'-bithiophene] (PDCBT). At a few hundreds of nanometers thickness, increased FFs are observed in all cases and improved overall device performances are obtained except for PDCBT upon increasing fullerene content in blend films. This fullerene content effect was studied in more detail by electrical and morphological characterization. The results suggest enhanced electron mobility and suppressed bimolecular recombination upon increasing fullerene content in thick polymer:fullerene blend films, which are the result of larger fullerene aggregates and improved interconnectivity of the fullerene phases that provide continuous percolating pathways for electron transport in thick films. These findings are important because an effective and straightforward method that enables fabricating efficient thick-film polymer solar cells is desirable for large-scale manufacturing via roll-to-roll processing and for multijunction devices.

Authors:
ORCiD logo [1];  [2];  [3];  [4]; ORCiD logo [2];  [2];  [5]; ORCiD logo [2];  [3]; ORCiD logo [5]
  1. South China Univ. of Technology, Guangzhou (China). Inst. of Polymer Optoelectronic Materials and Devices. State Key Lab. of Luminescent Materials and Devices; Eindhoven Univ. of Technology (Netherlands). Molecular Materials and Nanosystems. Inst. for Complex Molecular Systems
  2. North Carolina State Univ., Raleigh, NC (United States). Dept. of Physics. Organic and Carbon Electronics Labs (ORaCEL)
  3. Eindhoven Univ. of Technology (Netherlands). Molecular Materials and Nanosystems. Inst. for Complex Molecular Systems
  4. South China Univ. of Technology, Guangzhou (China). Inst. of Polymer Optoelectronic Materials and Devices. State Key Lab. of Luminescent Materials and Devices
  5. Eindhoven Univ. of Technology (Netherlands). Molecular Materials and Nanosystems. Inst. for Complex Molecular Systems; Dutch Inst. for Fundamental Energy Research, Eindhoven (Netherlands)
Publication Date:
Research Org.:
North Carolina State Univ., Raleigh, NC (United States); Eindhoven Univ. of Technology (Netherlands); South China Univ. of Technology (SCUT), Guangzhou (China)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Office of Naval Research (ONR) (United States); European Research Council (ERC); Ministry of Education, Culture and Science (Netherlands); Recruitment Program of Global Youth Experts of China; Ministry of Science and Technology (China)
OSTI Identifier:
1508784
Grant/Contract Number:  
AC02-05CH11231; N000141512322; N000141712204; 604148; 339031; 024.001.035; 2017YFA0206600
Resource Type:
Accepted Manuscript
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
Journal Volume: 11; Journal Issue: 11; Journal ID: ISSN 1944-8244
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; fill factor; fullerene loading; polymer solar cells; thick films

Citation Formats

Duan, Chunhui, Peng, Zhengxing, Colberts, Fallon J. M., Pang, Shuting, Ye, Long, Awartani, Omar M., Hendriks, Koen H., Ade, Harald, Wienk, Martijn M., and Janssen, René A. J. Efficient Thick-Film Polymer Solar Cells with Enhanced Fill Factors via Increased Fullerene Loading. United States: N. p., 2019. Web. doi:10.1021/acsami.9b00337.
Duan, Chunhui, Peng, Zhengxing, Colberts, Fallon J. M., Pang, Shuting, Ye, Long, Awartani, Omar M., Hendriks, Koen H., Ade, Harald, Wienk, Martijn M., & Janssen, René A. J. Efficient Thick-Film Polymer Solar Cells with Enhanced Fill Factors via Increased Fullerene Loading. United States. doi:10.1021/acsami.9b00337.
Duan, Chunhui, Peng, Zhengxing, Colberts, Fallon J. M., Pang, Shuting, Ye, Long, Awartani, Omar M., Hendriks, Koen H., Ade, Harald, Wienk, Martijn M., and Janssen, René A. J. Mon . "Efficient Thick-Film Polymer Solar Cells with Enhanced Fill Factors via Increased Fullerene Loading". United States. doi:10.1021/acsami.9b00337. https://www.osti.gov/servlets/purl/1508784.
@article{osti_1508784,
title = {Efficient Thick-Film Polymer Solar Cells with Enhanced Fill Factors via Increased Fullerene Loading},
author = {Duan, Chunhui and Peng, Zhengxing and Colberts, Fallon J. M. and Pang, Shuting and Ye, Long and Awartani, Omar M. and Hendriks, Koen H. and Ade, Harald and Wienk, Martijn M. and Janssen, René A. J.},
abstractNote = {Developing effective methods to make efficient bulk-heterojunction polymer solar cells at roll-to-roll relevant active layer thickness is of significant importance. We investigate the effect of fullerene content in polymer:fullerene blends on the fill factor (FF) and on the performance of thick-film solar cells for four different donor polymers PTB7-Th, PDPP-TPT, BDT-FBT-2T, and poly[5,5'-bis(2-butyloctyl)-(2,2'-bithiophene)-4,4'-dicarboxylate-alt-5,5'-2,2'-bithiophene] (PDCBT). At a few hundreds of nanometers thickness, increased FFs are observed in all cases and improved overall device performances are obtained except for PDCBT upon increasing fullerene content in blend films. This fullerene content effect was studied in more detail by electrical and morphological characterization. The results suggest enhanced electron mobility and suppressed bimolecular recombination upon increasing fullerene content in thick polymer:fullerene blend films, which are the result of larger fullerene aggregates and improved interconnectivity of the fullerene phases that provide continuous percolating pathways for electron transport in thick films. These findings are important because an effective and straightforward method that enables fabricating efficient thick-film polymer solar cells is desirable for large-scale manufacturing via roll-to-roll processing and for multijunction devices.},
doi = {10.1021/acsami.9b00337},
journal = {ACS Applied Materials and Interfaces},
number = 11,
volume = 11,
place = {United States},
year = {2019},
month = {2}
}

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