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Utilizing Energy Transfer in Binary and Ternary Bulk Heterojunction Organic Solar Cells

Feron, K. (author)
Commonwealth Scientific and Industrial Research Organisation (CSIRO),University of Newcastle
Cave, J. M. (author)
University of Bath
Thameel, M. N. (author)
University of Newcastle,University of Anbar
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O'Sullivan, C. (author)
University of Newcastle
Kroon, Renee, 1982 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Andersson, Mats, 1966 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Zhou, X. J. (author)
University of Newcastle
Fell, C. J. (author)
Commonwealth Scientific and Industrial Research Organisation (CSIRO)
Belcher, W. J. (author)
University of Newcastle
Walker, A. B. (author)
University of Bath
Dastoor, P. (author)
University of Newcastle
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 (creator_code:org_t)
2016-08-04
2016
English.
In: ACS Applied Materials & Interfaces. - : American Chemical Society (ACS). - 1944-8252 .- 1944-8244. ; 8:32, s. 20928-20937
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Energy transfer has been identified as an important process in ternary organic solar cells. Here, we develop kinetic Monte Carlo (KMC) models to assess the impact of energy transfer in ternary and binary bulk heterojunction systems. We used fluorescence and absorption spectroscopy to determine the energy disorder and Forster radii for poly(3-hexylthiophene-2,5-diyl), [6,6]-phenyl-C61-butyric acid methyl ester, 4-bis[4-(N,N-diisobutylamino)-2,6-dihydroxyphenyl]squaraine (DIBSq), and poly(2,5-thiophene-alt-4,9-bis(2-hexyldecyl)-4,9-dihydrodithieno[3,2-c:3 ',2'-h][1,5]naphthyridine-5,10-dione). Heterogeneous energy transfer is found to be crucial in the exciton dissociation process of both binary and ternary organic semiconductor systems. Circumstances favoring energy transfer across interfaces allow relaxation of the electronic energy level requirements, meaning that a cascade structure is not required for efficient ternary organic solar cells. We explain how energy transfer can be exploited to eliminate additional energy losses in ternary bulk heterojunction solar cells, thus increasing their open-circuit voltage without loss in short-circuit current. In particular, we show that it is important that the DIBSq is located at the electron donor acceptor interface; otherwise charge carriers will be trapped in the DIBSq domain or excitons in the DIBSq domains will not be able to dissociate efficiently at an interface. KMC modeling shows that only small amounts of DIBSq (

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Materialteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Materials Engineering (hsv//eng)
NATURVETENSKAP  -- Fysik -- Subatomär fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Subatomic Physics (hsv//eng)

Keyword

binary photovoltaic
ternary organic solar cells
Monte Carlo
exciton dissociation
energy level optimization
energy transfer

Publication and Content Type

art (subject category)
ref (subject category)

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