Transient extraction of holes and electrons separately unveils the transport dynamics in organic photovoltaics

Jiajun Peng; Xiaoqing Chen; Yani Chen; Oskar Sandberg; Ronald Österbacka; Ziqi Liang

doi:10.1002/aelm.201500333

Transient extraction of holes and electrons separately unveils the transport dynamics in organic photovoltaics

Jiajun Peng, Xiaoqing Chen, Yani Chen, Oskar Sandberg, Ronald Österbacka, Ziqi Liang

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

17 Citations (Scopus)

Abstract

We have utilized the metal–insulator–semiconductor charge extraction by linearly increasing voltage (MIS-CELIV) technique to clarify the hole- and electron-transport properties in benchmark poly(3-hexylthiophene) (P3HT) and its blend with phenyl-C61-butyric acid methyl ester (PCBM) by using a thick lithium fluoride (LiF) as the charge-blocking layer. Both dark and light MIS-CELIV are employed to comparatively investigate the differences in the recombination process and charge mobilities in neat P3HT and P3HT:PCBM blends. Our studies quantitatively show that balanced hole and electron transport can be achieved in the P3HT:PCBM blend under light illumination, leading to a high efficiency in the photovoltaic cell. Furthermore, light MIS-CELIV can be employed as a novel method to directly evaluate the capability of photoelectric conversion of organic photovoltaic materials.

Original language	Undefined/Unknown
Pages (from-to)	–
Journal	Advanced Electronic Materials
Volume	2
Issue number	3
DOIs	https://doi.org/10.1002/aelm.201500333
Publication status	Published - 2016
MoE publication type	A1 Journal article-refereed

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10.1002/aelm.201500333

http://onlinelibrary.wiley.com/wol1/doi/10.1002/aelm.201500333/full

Cite this

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title = "Transient extraction of holes and electrons separately unveils the transport dynamics in organic photovoltaics",

abstract = "We have utilized the metal–insulator–semiconductor charge extraction by linearly increasing voltage (MIS-CELIV) technique to clarify the hole- and electron-transport properties in benchmark poly(3-hexylthiophene) (P3HT) and its blend with phenyl-C61-butyric acid methyl ester (PCBM) by using a thick lithium fluoride (LiF) as the charge-blocking layer. Both dark and light MIS-CELIV are employed to comparatively investigate the differences in the recombination process and charge mobilities in neat P3HT and P3HT:PCBM blends. Our studies quantitatively show that balanced hole and electron transport can be achieved in the P3HT:PCBM blend under light illumination, leading to a high efficiency in the photovoltaic cell. Furthermore, light MIS-CELIV can be employed as a novel method to directly evaluate the capability of photoelectric conversion of organic photovoltaic materials.",

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AU - Peng, Jiajun

AU - Chen, Xiaoqing

AU - Chen, Yani

AU - Sandberg, Oskar

AU - Österbacka, Ronald

AU - Liang, Ziqi

N1 - fys. published online: 7 Jan 2016

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N2 - We have utilized the metal–insulator–semiconductor charge extraction by linearly increasing voltage (MIS-CELIV) technique to clarify the hole- and electron-transport properties in benchmark poly(3-hexylthiophene) (P3HT) and its blend with phenyl-C61-butyric acid methyl ester (PCBM) by using a thick lithium fluoride (LiF) as the charge-blocking layer. Both dark and light MIS-CELIV are employed to comparatively investigate the differences in the recombination process and charge mobilities in neat P3HT and P3HT:PCBM blends. Our studies quantitatively show that balanced hole and electron transport can be achieved in the P3HT:PCBM blend under light illumination, leading to a high efficiency in the photovoltaic cell. Furthermore, light MIS-CELIV can be employed as a novel method to directly evaluate the capability of photoelectric conversion of organic photovoltaic materials.

AB - We have utilized the metal–insulator–semiconductor charge extraction by linearly increasing voltage (MIS-CELIV) technique to clarify the hole- and electron-transport properties in benchmark poly(3-hexylthiophene) (P3HT) and its blend with phenyl-C61-butyric acid methyl ester (PCBM) by using a thick lithium fluoride (LiF) as the charge-blocking layer. Both dark and light MIS-CELIV are employed to comparatively investigate the differences in the recombination process and charge mobilities in neat P3HT and P3HT:PCBM blends. Our studies quantitatively show that balanced hole and electron transport can be achieved in the P3HT:PCBM blend under light illumination, leading to a high efficiency in the photovoltaic cell. Furthermore, light MIS-CELIV can be employed as a novel method to directly evaluate the capability of photoelectric conversion of organic photovoltaic materials.

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