Charge transport in intercalated and non-intercalated polymer:fullerene blends

Mathias Nyman; Oskar Sandberg; Ronald Österbacka

doi:10.1016/j.synthmet.2015.01.010

Charge transport in intercalated and non-intercalated polymer:fullerene blends

Mathias Nyman, Oskar Sandberg, Ronald Österbacka

Physics

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

9 Citations (Scopus)

Abstract

We present charge transport properties of intercalated and non-intercalated PBTTT:fullerene based bulk heterojunctions measured with the photo-CELIV technique. The mobilities are seen to vary greatly with fullerene loading in intercalated systems whereas the mobility in non-intercalated blends is fairly constant. The transport activation energies and widths of the Gaussian density of states (DOS) indicates lower energetic disorder in intercalated blends. The highest room temperature mobility of 2 × 10⁻³ cm²/Vs was obtained for a blend of 1:4 weight ratio PBTTT:PCBM, which is an order of magnitude higher than the other blends studied. We attribute the high mobility to lower energetic disorder and stronger electronic coupling between the transport sites due to shorter inter-site distances in the intercalated blend.

Original language	Undefined/Unknown
Pages (from-to)	6–10
Journal	Synthetic Metals
Volume	201
DOIs	https://doi.org/10.1016/j.synthmet.2015.01.010
Publication status	Published - 2015
MoE publication type	A1 Journal article-refereed

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10.1016/j.synthmet.2015.01.010

http://www.sciencedirect.com/science/article/pii/S0379677915000120

Cite this

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title = "Charge transport in intercalated and non-intercalated polymer:fullerene blends",

abstract = "We present charge transport properties of intercalated and non-intercalated PBTTT:fullerene based bulk heterojunctions measured with the photo-CELIV technique. The mobilities are seen to vary greatly with fullerene loading in intercalated systems whereas the mobility in non-intercalated blends is fairly constant. The transport activation energies and widths of the Gaussian density of states (DOS) indicates lower energetic disorder in intercalated blends. The highest room temperature mobility of 2 × 10−3 cm2/Vs was obtained for a blend of 1:4 weight ratio PBTTT:PCBM, which is an order of magnitude higher than the other blends studied. We attribute the high mobility to lower energetic disorder and stronger electronic coupling between the transport sites due to shorter inter-site distances in the intercalated blend.",

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T1 - Charge transport in intercalated and non-intercalated polymer:fullerene blends

AU - Nyman, Mathias

AU - Sandberg, Oskar

AU - Österbacka, Ronald

N1 - fys.

PY - 2015

Y1 - 2015

N2 - We present charge transport properties of intercalated and non-intercalated PBTTT:fullerene based bulk heterojunctions measured with the photo-CELIV technique. The mobilities are seen to vary greatly with fullerene loading in intercalated systems whereas the mobility in non-intercalated blends is fairly constant. The transport activation energies and widths of the Gaussian density of states (DOS) indicates lower energetic disorder in intercalated blends. The highest room temperature mobility of 2 × 10−3 cm2/Vs was obtained for a blend of 1:4 weight ratio PBTTT:PCBM, which is an order of magnitude higher than the other blends studied. We attribute the high mobility to lower energetic disorder and stronger electronic coupling between the transport sites due to shorter inter-site distances in the intercalated blend.

AB - We present charge transport properties of intercalated and non-intercalated PBTTT:fullerene based bulk heterojunctions measured with the photo-CELIV technique. The mobilities are seen to vary greatly with fullerene loading in intercalated systems whereas the mobility in non-intercalated blends is fairly constant. The transport activation energies and widths of the Gaussian density of states (DOS) indicates lower energetic disorder in intercalated blends. The highest room temperature mobility of 2 × 10−3 cm2/Vs was obtained for a blend of 1:4 weight ratio PBTTT:PCBM, which is an order of magnitude higher than the other blends studied. We attribute the high mobility to lower energetic disorder and stronger electronic coupling between the transport sites due to shorter inter-site distances in the intercalated blend.

U2 - 10.1016/j.synthmet.2015.01.010

DO - 10.1016/j.synthmet.2015.01.010

M3 - Artikel

SN - 0379-6779

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SP - 6

EP - 10

JO - Synthetic Metals

JF - Synthetic Metals

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