Panchromatic polymer-polymer ternary solar cells enhanced by Forster resonance energy transfer and solvent vapor annealing

Goh, Tenghooi; Sfeir, Matthew Y.; Huang, Jing -Shun; Bartolome, Benjamin; Vaisman, Michelle; Lee, Minjoo L.; Taylor, Andre D.

doi:10.1039/c5ta04905a

Title: Panchromatic polymer-polymer ternary solar cells enhanced by Forster resonance energy transfer and solvent vapor annealing

Journal Article · Tue Aug 04 00:00:00 EDT 2015 · Journal of Materials Chemistry. A

DOI:https://doi.org/10.1039/c5ta04905a· OSTI ID:1226069

Goh, Tenghooi ^[1]; Sfeir, Matthew Y. ^[2]; Huang, Jing -Shun ^[3]; Bartolome, Benjamin ^[1]; Vaisman, Michelle ^[1]; Lee, Minjoo L. ^[1]; Taylor, Andre D. ^[1]

Yale Univ., New Haven, CT (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)
Yale Univ., New Haven, CT (United States); California Institute of Technology, Pasadena, CA (United States)

Thanks to the bulk-heterojunction (BHJ) feature of polymer solar cells (PSC), additional light active components can be added with ease to form ternary solar cells. This strategy has achieved great success largely due to expanded spectral response range and improved power conversion efficiency (PCE) without incurring excessive processing costs. Here, we report ternary blend polymer–polymer solar cells comprised of PTB7, P3HT, and PC71BM with PCE as high as 8.2%. Analyses of femtosecond time resolved photoluminescence and transient absorption spectroscopy data confirm that P3HT is effective in transferring energy non-radiatively by inducing excitons and prolonging their overall lifetime in PTB7. As a result, solvent vapor annealing (SVA) treatment was employed to rectify the overly-coarse morphology, thus enhancing the fill factor, reducing interfacial recombination, and boosting the PCE to 8.7%.

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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:: 1226069

Report Number(s):: BNL-108547-2015-JA; JMCAET; R&D Project: 16063; KC0403020

Journal Information:: Journal of Materials Chemistry. A, Vol. 3, Issue 36; ISSN 2050-7488

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 54 works

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Title: Panchromatic polymer-polymer ternary solar cells enhanced by Forster resonance energy transfer and solvent vapor annealing

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