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

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.

doi:10.1002/aenm.201600660

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

Journal Article · Thu Aug 11 00:00:00 EDT 2016 · Advanced Energy Materials

DOI:https://doi.org/10.1002/aenm.201600660· OSTI ID:1347379

Goh, Tenghooi ^[1]; Huang, Jing -Shun ^[1]; Yager, Kevin G. ^[2]; Sfeir, Matthew Y. ^[2]; Nam, Chang -Yong ^[2]; Tong, Xiao ^[2]; Guard, Louise M. ^[1]; Melvin, Patrick R. ^[1]; Antonio, Francisco ^[1]; Bartolome, Benjamin G. ^[1]; Lee, Minjoo L. ^[1]; Hazari, Nilay ^[1]; Taylor, André D. ^[1]

Yale Univ., New Haven, CT (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)

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.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC00112704

OSTI ID:: 1347379

Report Number(s):: BNL-113666-2017-JA; R&D Project: 16063; KC0403020

Journal Information:: Advanced Energy Materials, Vol. 6, Issue 21; ISSN 1614-6832

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 48 works

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polymer solar cells
squaraine dye
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morphology enhancement
organic crystallization

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

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