Formation of nanopatterned polymer blends in photovoltaic devices

Ximin He; Feng Gao; Guoli Tu; David Hasko; Sven Hüttner; Ullrich Steiner; Neil C. Greenham; Richard H. Friend; Wilhelm T.S. Huck

doi:10.1021/nl904098m

Formation of nanopatterned polymer blends in photovoltaic devices

Ximin He, Feng Gao, Guoli Tu, David Hasko, Sven Hüttner, Ullrich Steiner, Neil C. Greenham, Richard H. Friend, Wilhelm T.S. Huck

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

203 Scopus citations

Abstract

In this paper, we demonstrate a double nanoimprinting process that allows the formation of nanostructured polymer heterojunctions of composition and morphology that can be selected independently. We fabricated photovoltaic (PV) devices with extremely high densities (10¹⁴/mm²) of interpenetrating nanoscale columnar features in the active polymer blend layer. The smallest feature sizes are as small as 25 nm on a 50 nm pitch, which results in a spacing of heterojunctions at or below the exciton diffusion length. Photovoltaic devices based on double-imprinted poly((9,9-dioctylfluorene)-2,7- diyl-alt-[4,7-bis(3-hexylthien-5-yl)-2,1,3-benzothiadiazole]-2′, 2″-diyl) (F8TBT)/ poly(3-hexylthiophene) (P3HT) films are among the best polymer?polymer blend devices reported to date with a power conversion efficiency (PCE, η_e) of 1.9%.

Original language	English (US)
Pages (from-to)	1302-1307
Number of pages	6
Journal	Nano Letters
Volume	10
Issue number	4
DOIs	https://doi.org/10.1021/nl904098m
State	Published - Apr 14 2010
Externally published	Yes

Keywords

Nanoimprint lithography
Nanoscale morphology
Polymer blends
Polymer photovoltaics

ASJC Scopus subject areas

Bioengineering
General Chemistry
General Materials Science
Condensed Matter Physics
Mechanical Engineering

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10.1021/nl904098m

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abstract = "In this paper, we demonstrate a double nanoimprinting process that allows the formation of nanostructured polymer heterojunctions of composition and morphology that can be selected independently. We fabricated photovoltaic (PV) devices with extremely high densities (1014/mm2) of interpenetrating nanoscale columnar features in the active polymer blend layer. The smallest feature sizes are as small as 25 nm on a 50 nm pitch, which results in a spacing of heterojunctions at or below the exciton diffusion length. Photovoltaic devices based on double-imprinted poly((9,9-dioctylfluorene)-2,7- diyl-alt-[4,7-bis(3-hexylthien-5-yl)-2,1,3-benzothiadiazole]-2′, 2″-diyl) (F8TBT)/ poly(3-hexylthiophene) (P3HT) films are among the best polymer?polymer blend devices reported to date with a power conversion efficiency (PCE, ηe) of 1.9%.",

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author = "Ximin He and Feng Gao and Guoli Tu and David Hasko and Sven H{\"u}ttner and Ullrich Steiner and Greenham, {Neil C.} and Friend, {Richard H.} and Huck, {Wilhelm T.S.}",

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AU - He, Ximin

AU - Gao, Feng

AU - Tu, Guoli

AU - Hasko, David

AU - Hüttner, Sven

AU - Steiner, Ullrich

AU - Greenham, Neil C.

AU - Friend, Richard H.

AU - Huck, Wilhelm T.S.

PY - 2010/4/14

Y1 - 2010/4/14

N2 - In this paper, we demonstrate a double nanoimprinting process that allows the formation of nanostructured polymer heterojunctions of composition and morphology that can be selected independently. We fabricated photovoltaic (PV) devices with extremely high densities (1014/mm2) of interpenetrating nanoscale columnar features in the active polymer blend layer. The smallest feature sizes are as small as 25 nm on a 50 nm pitch, which results in a spacing of heterojunctions at or below the exciton diffusion length. Photovoltaic devices based on double-imprinted poly((9,9-dioctylfluorene)-2,7- diyl-alt-[4,7-bis(3-hexylthien-5-yl)-2,1,3-benzothiadiazole]-2′, 2″-diyl) (F8TBT)/ poly(3-hexylthiophene) (P3HT) films are among the best polymer?polymer blend devices reported to date with a power conversion efficiency (PCE, ηe) of 1.9%.

AB - In this paper, we demonstrate a double nanoimprinting process that allows the formation of nanostructured polymer heterojunctions of composition and morphology that can be selected independently. We fabricated photovoltaic (PV) devices with extremely high densities (1014/mm2) of interpenetrating nanoscale columnar features in the active polymer blend layer. The smallest feature sizes are as small as 25 nm on a 50 nm pitch, which results in a spacing of heterojunctions at or below the exciton diffusion length. Photovoltaic devices based on double-imprinted poly((9,9-dioctylfluorene)-2,7- diyl-alt-[4,7-bis(3-hexylthien-5-yl)-2,1,3-benzothiadiazole]-2′, 2″-diyl) (F8TBT)/ poly(3-hexylthiophene) (P3HT) films are among the best polymer?polymer blend devices reported to date with a power conversion efficiency (PCE, ηe) of 1.9%.

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KW - Nanoscale morphology

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KW - Polymer photovoltaics

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Formation of nanopatterned polymer blends in photovoltaic devices

Abstract

Keywords

ASJC Scopus subject areas

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