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Title: Quaternary organic solar cells enhanced by cocrystalline squaraines with power conversion efficiencies >10%

Abstract

The incorporation of multiple donors into the bulk-heterojunction layer of organic polymer solar cells (PSCs) has been demonstrated as a practical and elegant strategy to improve photovoltaics performance. However, it is challenging to successfully design and blend multiple donors, while minimizing unfavorable interactions (e.g., morphological traps, recombination centers, etc.). Here, a new Förster resonance energy transfer-based design is shown utilizing the synergistic nature of three light active donors (two small molecules and a high-performance donor–acceptor polymer) with a fullerene acceptor to create highly efficient quaternary PSCs with power conversion efficiencies (PCEs) of up to 10.7%. Within this quaternary architecture, it is revealed that the addition of small molecules in low concentrations broadens the absorption bandwidth, induces cocrystalline molecular conformations, and promotes rapid (picosecond) energy transfer processes. Finally, these results provide guidance for the design of multiple-donor systems using simple processing techniques to realize single-junction PSC designs with unprecedented PCEs.

Authors:
 [1];  [1];  [2];  [2];  [2];  [2];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Yale Univ., New Haven, CT (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1347379
Report Number(s):
BNL-113666-2017-JA
Journal ID: ISSN 1614-6832; R&D Project: 16063; KC0403020
Grant/Contract Number:  
SC00112704
Resource Type:
Accepted Manuscript
Journal Name:
Advanced Energy Materials
Additional Journal Information:
Journal Volume: 6; Journal Issue: 21; Journal ID: ISSN 1614-6832
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; polymer solar cells; squaraine dye; resonance energy transfer; morphology enhancement; organic crystallization

Citation Formats

Goh, Tenghooi, Huang, Jing -Shun, Yager, Kevin G., Sfeir, Matthew Y., Nam, Chang -Yong, Tong, Xiao, Guard, Louise M., Melvin, Patrick R., Antonio, Francisco, Bartolome, Benjamin G., Lee, Minjoo L., Hazari, Nilay, and Taylor, André D. Quaternary organic solar cells enhanced by cocrystalline squaraines with power conversion efficiencies >10%. United States: N. p., 2016. Web. doi:10.1002/aenm.201600660.
Goh, Tenghooi, Huang, Jing -Shun, Yager, Kevin G., Sfeir, Matthew Y., Nam, Chang -Yong, Tong, Xiao, Guard, Louise M., Melvin, Patrick R., Antonio, Francisco, Bartolome, Benjamin G., Lee, Minjoo L., Hazari, Nilay, & Taylor, André D. Quaternary organic solar cells enhanced by cocrystalline squaraines with power conversion efficiencies >10%. United States. doi:10.1002/aenm.201600660.
Goh, Tenghooi, Huang, Jing -Shun, Yager, Kevin G., Sfeir, Matthew Y., Nam, Chang -Yong, Tong, Xiao, Guard, Louise M., Melvin, Patrick R., Antonio, Francisco, Bartolome, Benjamin G., Lee, Minjoo L., Hazari, Nilay, and Taylor, André D. Thu . "Quaternary organic solar cells enhanced by cocrystalline squaraines with power conversion efficiencies >10%". United States. doi:10.1002/aenm.201600660. https://www.osti.gov/servlets/purl/1347379.
@article{osti_1347379,
title = {Quaternary organic solar cells enhanced by cocrystalline squaraines with power conversion efficiencies >10%},
author = {Goh, Tenghooi and Huang, Jing -Shun and Yager, Kevin G. and Sfeir, Matthew Y. and Nam, Chang -Yong and Tong, Xiao and Guard, Louise M. and Melvin, Patrick R. and Antonio, Francisco and Bartolome, Benjamin G. and Lee, Minjoo L. and Hazari, Nilay and Taylor, André D.},
abstractNote = {The incorporation of multiple donors into the bulk-heterojunction layer of organic polymer solar cells (PSCs) has been demonstrated as a practical and elegant strategy to improve photovoltaics performance. However, it is challenging to successfully design and blend multiple donors, while minimizing unfavorable interactions (e.g., morphological traps, recombination centers, etc.). Here, a new Förster resonance energy transfer-based design is shown utilizing the synergistic nature of three light active donors (two small molecules and a high-performance donor–acceptor polymer) with a fullerene acceptor to create highly efficient quaternary PSCs with power conversion efficiencies (PCEs) of up to 10.7%. Within this quaternary architecture, it is revealed that the addition of small molecules in low concentrations broadens the absorption bandwidth, induces cocrystalline molecular conformations, and promotes rapid (picosecond) energy transfer processes. Finally, these results provide guidance for the design of multiple-donor systems using simple processing techniques to realize single-junction PSC designs with unprecedented PCEs.},
doi = {10.1002/aenm.201600660},
journal = {Advanced Energy Materials},
number = 21,
volume = 6,
place = {United States},
year = {2016},
month = {8}
}

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