Enhance performance of organic solar cells based on an isoindigo-based copolymer by balancing absorption and miscibility of electron acceptor.

Zaifei Ma; Ergang Wang; Koen Vandewal; Mats R. Andersson; Fengling Zhang

doi:10.1063/1.3645622

Enhance performance of organic solar cells based on an isoindigo-based copolymer by balancing absorption and miscibility of electron acceptor.

Zaifei Ma, Ergang Wang, Koen Vandewal, Mats R. Andersson, Fengling Zhang

Research output: Contribution to journal › Article › peer-review

47 Citations (Scopus)

Abstract

Superior absorption of PC₇₁BM in visible region to that of PC₆₁BM makes PC₇₁BM a predominant acceptor for most high efficient polymer solar cells (PSCs). However, we will demonstrate that power conversion efficiencies (PCEs) of PSCs based on poly[N,N′-bis(2- hexyldecyl)isoindigo-6,6′-diyl-alt-thiophene-2,5-diyl] (PTI-1) with PC₆₁BM as acceptor are 50 higher than their PC₇₁BM counterparts under illumination of AM1.5G. AFM images reveal different topographies of the blends between PTI-1:PC₆₁BM and PTI-1:PC ₇₁BM, which suggests that acceptor's miscibility plays a more important role than absorption. The photocurrent of 9.1 mA/cm² is among the highest value in PSCs with a driving force for exciton dissociation less than 0.2 eV.

Original language	English
Article number	143302
Pages (from-to)	Art: 143302
Number of pages	4
Journal	Applied Physics Letters
Volume	99
Issue number	14
DOIs	https://doi.org/10.1063/1.3645622
Publication status	Published - 3 Oct 2011

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title = "Enhance performance of organic solar cells based on an isoindigo-based copolymer by balancing absorption and miscibility of electron acceptor.",

abstract = "Superior absorption of PC71BM in visible region to that of PC61BM makes PC71BM a predominant acceptor for most high efficient polymer solar cells (PSCs). However, we will demonstrate that power conversion efficiencies (PCEs) of PSCs based on poly[N,N′-bis(2- hexyldecyl)isoindigo-6,6′-diyl-alt-thiophene-2,5-diyl] (PTI-1) with PC61BM as acceptor are 50 higher than their PC71BM counterparts under illumination of AM1.5G. AFM images reveal different topographies of the blends between PTI-1:PC61BM and PTI-1:PC 71BM, which suggests that acceptor's miscibility plays a more important role than absorption. The photocurrent of 9.1 mA/cm2 is among the highest value in PSCs with a driving force for exciton dissociation less than 0.2 eV.",

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AU - Ma, Zaifei

AU - Wang, Ergang

AU - Vandewal, Koen

AU - Andersson, Mats R.

AU - Zhang, Fengling

PY - 2011/10/3

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N2 - Superior absorption of PC71BM in visible region to that of PC61BM makes PC71BM a predominant acceptor for most high efficient polymer solar cells (PSCs). However, we will demonstrate that power conversion efficiencies (PCEs) of PSCs based on poly[N,N′-bis(2- hexyldecyl)isoindigo-6,6′-diyl-alt-thiophene-2,5-diyl] (PTI-1) with PC61BM as acceptor are 50 higher than their PC71BM counterparts under illumination of AM1.5G. AFM images reveal different topographies of the blends between PTI-1:PC61BM and PTI-1:PC 71BM, which suggests that acceptor's miscibility plays a more important role than absorption. The photocurrent of 9.1 mA/cm2 is among the highest value in PSCs with a driving force for exciton dissociation less than 0.2 eV.

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Enhance performance of organic solar cells based on an isoindigo-based copolymer by balancing absorption and miscibility of electron acceptor.

Abstract

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