Vertical stratification and its impact on device performance in a polycarbazole based copolymer solar cells

Tao Wang; Nicholas W. Scarratt; Hunan Yi; Iain F. Coleman; Yiwei Zhang; Richard T. Grant; Jizhong Yao; Maximilian W. A. Skoda; Alan D. F. Dunbar; Richard A. L. Jones; Ahmed Iraqi; David G. Lidzey

doi:10.1039/c4tc02884h

Vertical stratification and its impact on device performance in a polycarbazole based copolymer solar cells

Tao Wang, Nicholas W. Scarratt, Hunan Yi, Iain F. Coleman, Yiwei Zhang, Richard T. Grant, Jizhong Yao, Maximilian W. A. Skoda, Alan D. F. Dunbar, Richard A. L. Jones, Ahmed Iraqi, David G. Lidzey

Materials Engineering

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

Abstract

Using neutron-reflectivity, we study vertical stratification and device performance in bulk hetero-junction organic photovoltaic (OPV) cells consisting of a blend of PC71BM with a carbazole-based donor–acceptor copolymer PCDTBT1. We find that when the blend is cast on a PEDOT:PSS/ITO anode, a PC71BM-depleted (polymer-rich) layer is formed at the PEDOT:PSS interface, whilst a PC71BM-depleted layer is instead located at the air-interface when the same blend is cast on a solution processed MoOx thin film. OPV device characterization measurements indicate that unfavourable vertical segregation can have a profound effect on OPV device characteristics via increased charge recombination.

Original language	English
Pages (from-to)	4007-4015
Number of pages	9
Journal	Journal of Materials Chemistry C
Volume	3
Issue number	16
DOIs	https://doi.org/10.1039/c4tc02884h
Publication status	Published - 2015

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title = "Vertical stratification and its impact on device performance in a polycarbazole based copolymer solar cells",

abstract = "Using neutron-reflectivity, we study vertical stratification and device performance in bulk hetero-junction organic photovoltaic (OPV) cells consisting of a blend of PC71BM with a carbazole-based donor–acceptor copolymer PCDTBT1. We find that when the blend is cast on a PEDOT:PSS/ITO anode, a PC71BM-depleted (polymer-rich) layer is formed at the PEDOT:PSS interface, whilst a PC71BM-depleted layer is instead located at the air-interface when the same blend is cast on a solution processed MoOx thin film. OPV device characterization measurements indicate that unfavourable vertical segregation can have a profound effect on OPV device characteristics via increased charge recombination.",

author = "Tao Wang and Scarratt, \{Nicholas W.\} and Hunan Yi and Coleman, \{Iain F.\} and Yiwei Zhang and Grant, \{Richard T.\} and Jizhong Yao and Skoda, \{Maximilian W. A.\} and Dunbar, \{Alan D. F.\} and Jones, \{Richard A. L.\} and Ahmed Iraqi and Lidzey, \{David G.\}",

year = "2015",

doi = "10.1039/c4tc02884h",

language = "English",

volume = "3",

pages = "4007--4015",

journal = "Journal of Materials Chemistry C",

issn = "2050-7526",

publisher = "Royal Society of Chemistry",

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TY - JOUR

T1 - Vertical stratification and its impact on device performance in a polycarbazole based copolymer solar cells

AU - Wang, Tao

AU - Scarratt, Nicholas W.

AU - Yi, Hunan

AU - Coleman, Iain F.

AU - Zhang, Yiwei

AU - Grant, Richard T.

AU - Yao, Jizhong

AU - Skoda, Maximilian W. A.

AU - Dunbar, Alan D. F.

AU - Jones, Richard A. L.

AU - Iraqi, Ahmed

AU - Lidzey, David G.

PY - 2015

Y1 - 2015

N2 - Using neutron-reflectivity, we study vertical stratification and device performance in bulk hetero-junction organic photovoltaic (OPV) cells consisting of a blend of PC71BM with a carbazole-based donor–acceptor copolymer PCDTBT1. We find that when the blend is cast on a PEDOT:PSS/ITO anode, a PC71BM-depleted (polymer-rich) layer is formed at the PEDOT:PSS interface, whilst a PC71BM-depleted layer is instead located at the air-interface when the same blend is cast on a solution processed MoOx thin film. OPV device characterization measurements indicate that unfavourable vertical segregation can have a profound effect on OPV device characteristics via increased charge recombination.

AB - Using neutron-reflectivity, we study vertical stratification and device performance in bulk hetero-junction organic photovoltaic (OPV) cells consisting of a blend of PC71BM with a carbazole-based donor–acceptor copolymer PCDTBT1. We find that when the blend is cast on a PEDOT:PSS/ITO anode, a PC71BM-depleted (polymer-rich) layer is formed at the PEDOT:PSS interface, whilst a PC71BM-depleted layer is instead located at the air-interface when the same blend is cast on a solution processed MoOx thin film. OPV device characterization measurements indicate that unfavourable vertical segregation can have a profound effect on OPV device characteristics via increased charge recombination.

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U2 - 10.1039/c4tc02884h

DO - 10.1039/c4tc02884h

M3 - Article

SN - 2050-7526

VL - 3

SP - 4007

EP - 4015

JO - Journal of Materials Chemistry C

JF - Journal of Materials Chemistry C

IS - 16

ER -

Vertical stratification and its impact on device performance in a polycarbazole based copolymer solar cells

Abstract

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