Thermal annealing-induced vertical phase separation of copper phthalocyanine: Fullerene bulk heterojunction in organic photovoltaic cells

H. X. Wei; J. Li; Z. Q. Xu; Y. Cai; J. X. Tang; Y. Q. Li

doi:10.1063/1.3483761

Thermal annealing-induced vertical phase separation of copper phthalocyanine: Fullerene bulk heterojunction in organic photovoltaic cells

H. X. Wei
, J. Li
, Z. Q. Xu
, Y. Cai
, J. X. Tang
, Y. Q. Li

Soochow University

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

39 Scopus citations

Abstract

The effect of thermal annealing treatment on the morphology change in bulk heterojunction (BHJ) in organic photovoltaic cells was studied by photoemission spectroscopy. The results reveal that vertical phase separation upon annealing occurs in typical BHJ layer formed between planar molecule CuPc and spherical C₆₀ with inhomogeneous concentration distribution in profile, varying from CuPc-rich near the air surface to C₆₀ -rich adjacent to the substrate interface. The morphology variation is associated with the difference in surface energy of CuPc and C₆₀, leading to the accumulation of CuPc to the interface with air to lower the overall energy of the free surface.

Original language	English
Article number	083302
Journal	Applied Physics Letters
Volume	97
Issue number	8
DOIs	https://doi.org/10.1063/1.3483761
State	Published - 23 Aug 2010
Externally published	Yes

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title = "Thermal annealing-induced vertical phase separation of copper phthalocyanine: Fullerene bulk heterojunction in organic photovoltaic cells",

abstract = "The effect of thermal annealing treatment on the morphology change in bulk heterojunction (BHJ) in organic photovoltaic cells was studied by photoemission spectroscopy. The results reveal that vertical phase separation upon annealing occurs in typical BHJ layer formed between planar molecule CuPc and spherical C60 with inhomogeneous concentration distribution in profile, varying from CuPc-rich near the air surface to C60 -rich adjacent to the substrate interface. The morphology variation is associated with the difference in surface energy of CuPc and C60, leading to the accumulation of CuPc to the interface with air to lower the overall energy of the free surface.",

author = "Wei, \{H. X.\} and J. Li and Xu, \{Z. Q.\} and Y. Cai and Tang, \{J. X.\} and Li, \{Y. Q.\}",

year = "2010",

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doi = "10.1063/1.3483761",

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T2 - Fullerene bulk heterojunction in organic photovoltaic cells

AU - Wei, H. X.

AU - Li, J.

AU - Xu, Z. Q.

AU - Cai, Y.

AU - Tang, J. X.

AU - Li, Y. Q.

PY - 2010/8/23

Y1 - 2010/8/23

N2 - The effect of thermal annealing treatment on the morphology change in bulk heterojunction (BHJ) in organic photovoltaic cells was studied by photoemission spectroscopy. The results reveal that vertical phase separation upon annealing occurs in typical BHJ layer formed between planar molecule CuPc and spherical C60 with inhomogeneous concentration distribution in profile, varying from CuPc-rich near the air surface to C60 -rich adjacent to the substrate interface. The morphology variation is associated with the difference in surface energy of CuPc and C60, leading to the accumulation of CuPc to the interface with air to lower the overall energy of the free surface.

AB - The effect of thermal annealing treatment on the morphology change in bulk heterojunction (BHJ) in organic photovoltaic cells was studied by photoemission spectroscopy. The results reveal that vertical phase separation upon annealing occurs in typical BHJ layer formed between planar molecule CuPc and spherical C60 with inhomogeneous concentration distribution in profile, varying from CuPc-rich near the air surface to C60 -rich adjacent to the substrate interface. The morphology variation is associated with the difference in surface energy of CuPc and C60, leading to the accumulation of CuPc to the interface with air to lower the overall energy of the free surface.

UR - https://www.scopus.com/pages/publications/77956198872

U2 - 10.1063/1.3483761

DO - 10.1063/1.3483761

M3 - 文章

AN - SCOPUS:77956198872

SN - 0003-6951

VL - 97

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 8

M1 - 083302

ER -

Thermal annealing-induced vertical phase separation of copper phthalocyanine: Fullerene bulk heterojunction in organic photovoltaic cells

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