Effect of charge recombination on the fill factor of small molecule bulk heterojunction solar cells

Yuan Zhang; Xuan Dung Dang; Chunki Kim; Thuc Quyen Nguyen

doi:10.1002/aenm.201100040

Effect of charge recombination on the fill factor of small molecule bulk heterojunction solar cells

Yuan Zhang^*
, Xuan Dung Dang
, Chunki Kim
, Thuc Quyen Nguyen

^*Corresponding author for this work

University of California at Santa Barbara

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

151 Scopus citations

Abstract

Solution-processed organic BHJ solar cells based on 3,6-bis[5-(benzofuran- 2-yl)thiophen-2-yl]-2,5-bis(2-ethylhexyl)pyrrolo[3,4-c]pyrrole-1,4-dione (DPP(TBFu) ₂) or poly(3-hexylthiophene) blended with [6,6]-phenyl-C ₆₀₍₇₀₎-butyric acid methyl ester (PC ₆₀₍₇₀₎ BM) behave differently under various irradiation intensities. Small molecule-based DPP(TBFu) ₂:PC ₆₀ BM solar cells show up to 5.2% power conversion efficiency and a high fill factor at low light intensity. At 100 mW cm ^-2 illumination, the efficiency and fill factor decrease, resulting in stronger power losses. Impedance spectroscopy at various light intensities reveals that high charge recombination is the cause of the low fill factor in DPP(TBFu) ₂:PC ₆₀ BM.

Original language	English
Pages (from-to)	610-617
Number of pages	8
Journal	Advanced Energy Materials
Volume	1
Issue number	4
DOIs	https://doi.org/10.1002/aenm.201100040
State	Published - Jul 2011
Externally published	Yes

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10.1002/aenm.201100040

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@article{0d760cde364e4b0883cd9a285ed92c80,

title = "Effect of charge recombination on the fill factor of small molecule bulk heterojunction solar cells",

abstract = "Solution-processed organic BHJ solar cells based on 3,6-bis[5-(benzofuran- 2-yl)thiophen-2-yl]-2,5-bis(2-ethylhexyl)pyrrolo[3,4-c]pyrrole-1,4-dione (DPP(TBFu) 2) or poly(3-hexylthiophene) blended with [6,6]-phenyl-C 60(70)-butyric acid methyl ester (PC 60(70) BM) behave differently under various irradiation intensities. Small molecule-based DPP(TBFu) 2:PC 60 BM solar cells show up to 5.2\% power conversion efficiency and a high fill factor at low light intensity. At 100 mW cm -2 illumination, the efficiency and fill factor decrease, resulting in stronger power losses. Impedance spectroscopy at various light intensities reveals that high charge recombination is the cause of the low fill factor in DPP(TBFu) 2:PC 60 BM.",

author = "Yuan Zhang and Dang, \{Xuan Dung\} and Chunki Kim and Nguyen, \{Thuc Quyen\}",

year = "2011",

month = jul,

doi = "10.1002/aenm.201100040",

language = "英语",

volume = "1",

pages = "610--617",

journal = "Advanced Energy Materials",

issn = "1614-6832",

publisher = "John Wiley and Sons Inc",

number = "4",

}

TY - JOUR

T1 - Effect of charge recombination on the fill factor of small molecule bulk heterojunction solar cells

AU - Zhang, Yuan

AU - Dang, Xuan Dung

AU - Kim, Chunki

AU - Nguyen, Thuc Quyen

PY - 2011/7

Y1 - 2011/7

N2 - Solution-processed organic BHJ solar cells based on 3,6-bis[5-(benzofuran- 2-yl)thiophen-2-yl]-2,5-bis(2-ethylhexyl)pyrrolo[3,4-c]pyrrole-1,4-dione (DPP(TBFu) 2) or poly(3-hexylthiophene) blended with [6,6]-phenyl-C 60(70)-butyric acid methyl ester (PC 60(70) BM) behave differently under various irradiation intensities. Small molecule-based DPP(TBFu) 2:PC 60 BM solar cells show up to 5.2% power conversion efficiency and a high fill factor at low light intensity. At 100 mW cm -2 illumination, the efficiency and fill factor decrease, resulting in stronger power losses. Impedance spectroscopy at various light intensities reveals that high charge recombination is the cause of the low fill factor in DPP(TBFu) 2:PC 60 BM.

AB - Solution-processed organic BHJ solar cells based on 3,6-bis[5-(benzofuran- 2-yl)thiophen-2-yl]-2,5-bis(2-ethylhexyl)pyrrolo[3,4-c]pyrrole-1,4-dione (DPP(TBFu) 2) or poly(3-hexylthiophene) blended with [6,6]-phenyl-C 60(70)-butyric acid methyl ester (PC 60(70) BM) behave differently under various irradiation intensities. Small molecule-based DPP(TBFu) 2:PC 60 BM solar cells show up to 5.2% power conversion efficiency and a high fill factor at low light intensity. At 100 mW cm -2 illumination, the efficiency and fill factor decrease, resulting in stronger power losses. Impedance spectroscopy at various light intensities reveals that high charge recombination is the cause of the low fill factor in DPP(TBFu) 2:PC 60 BM.

UR - https://www.scopus.com/pages/publications/81255177949

U2 - 10.1002/aenm.201100040

DO - 10.1002/aenm.201100040

M3 - 文章

AN - SCOPUS:81255177949

SN - 1614-6832

VL - 1

SP - 610

EP - 617

JO - Advanced Energy Materials

JF - Advanced Energy Materials

IS - 4

ER -

Effect of charge recombination on the fill factor of small molecule bulk heterojunction solar cells

Abstract

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