Mobility and density relaxation of photogenerated charge carriers in organic materials

R. Österbacka; A. Pivrikas; G. Juška; K. Genevičius; K. Arlauskas; H. Stubb

doi:10.1016/j.cap.2004.01.013

Mobility and density relaxation of photogenerated charge carriers in organic materials

R. Österbacka^*, A. Pivrikas, G. Juška, K. Genevičius, K. Arlauskas, H. Stubb

^*Corresponding author for this work

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

80 Citations (Scopus)

Abstract

We have measured mobility and density relaxation of photogenerated charge carriers in regiorandom poly(3-hexylthiophene) using novel extraction current transient techniques. We show how to obtain time-dependent mobility μ and charge carrier density p using independent measurements. The results show μ∝t ^-0.42 independent on charge carrier density. The carrier density follows a bimolecular decay with the bimolecular recombination coefficient β=7.2×10^-13 cm³/s. The measured time-of-flight current follows closely the estimated time decay as j(t)∝p(t)μ(t), with deviation arising from extraction of the generated charge carriers.

Original language	English
Pages (from-to)	534-538
Number of pages	5
Journal	Current Applied Physics
Volume	4
Issue number	5
DOIs	https://doi.org/10.1016/j.cap.2004.01.013
Publication status	Published - Aug 2004
MoE publication type	A1 Journal article-refereed

Keywords

Extraction current transients
Gaussian disorder
Time-of-flight
Transport

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10.1016/j.cap.2004.01.013

Cite this

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title = "Mobility and density relaxation of photogenerated charge carriers in organic materials",

abstract = "We have measured mobility and density relaxation of photogenerated charge carriers in regiorandom poly(3-hexylthiophene) using novel extraction current transient techniques. We show how to obtain time-dependent mobility μ and charge carrier density p using independent measurements. The results show μ∝t -0.42 independent on charge carrier density. The carrier density follows a bimolecular decay with the bimolecular recombination coefficient β=7.2×10-13 cm3/s. The measured time-of-flight current follows closely the estimated time decay as j(t)∝p(t)μ(t), with deviation arising from extraction of the generated charge carriers.",

keywords = "Extraction current transients, Gaussian disorder, Time-of-flight, Transport",

author = "R. {\"O}sterbacka and A. Pivrikas and G. Ju{\v s}ka and K. Genevi{\v c}ius and K. Arlauskas and H. Stubb",

note = "Funding Information: We thank Planar International for the ITO substrates. Financial support for this project came from the Academy of Finland through grant no. 50575, Technology Development Centre in Finland, TEKES project MUOELE03 and Lithuanian VMSF grant no. T-10. Copyright: Copyright 2004 Elsevier B.V., All rights reserved.",

year = "2004",

month = aug,

doi = "10.1016/j.cap.2004.01.013",

language = "English",

volume = "4",

pages = "534--538",

journal = "Current Applied Physics",

issn = "1567-1739",

publisher = "Elsevier",

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TY - JOUR

T1 - Mobility and density relaxation of photogenerated charge carriers in organic materials

AU - Österbacka, R.

AU - Pivrikas, A.

AU - Juška, G.

AU - Genevičius, K.

AU - Arlauskas, K.

AU - Stubb, H.

N1 - Funding Information: We thank Planar International for the ITO substrates. Financial support for this project came from the Academy of Finland through grant no. 50575, Technology Development Centre in Finland, TEKES project MUOELE03 and Lithuanian VMSF grant no. T-10. Copyright: Copyright 2004 Elsevier B.V., All rights reserved.

PY - 2004/8

Y1 - 2004/8

N2 - We have measured mobility and density relaxation of photogenerated charge carriers in regiorandom poly(3-hexylthiophene) using novel extraction current transient techniques. We show how to obtain time-dependent mobility μ and charge carrier density p using independent measurements. The results show μ∝t -0.42 independent on charge carrier density. The carrier density follows a bimolecular decay with the bimolecular recombination coefficient β=7.2×10-13 cm3/s. The measured time-of-flight current follows closely the estimated time decay as j(t)∝p(t)μ(t), with deviation arising from extraction of the generated charge carriers.

AB - We have measured mobility and density relaxation of photogenerated charge carriers in regiorandom poly(3-hexylthiophene) using novel extraction current transient techniques. We show how to obtain time-dependent mobility μ and charge carrier density p using independent measurements. The results show μ∝t -0.42 independent on charge carrier density. The carrier density follows a bimolecular decay with the bimolecular recombination coefficient β=7.2×10-13 cm3/s. The measured time-of-flight current follows closely the estimated time decay as j(t)∝p(t)μ(t), with deviation arising from extraction of the generated charge carriers.

KW - Extraction current transients

KW - Gaussian disorder

KW - Time-of-flight

KW - Transport

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U2 - 10.1016/j.cap.2004.01.013

DO - 10.1016/j.cap.2004.01.013

M3 - Article

AN - SCOPUS:3242795900

SN - 1567-1739

VL - 4

SP - 534

EP - 538

JO - Current Applied Physics

JF - Current Applied Physics

IS - 5

ER -

Mobility and density relaxation of photogenerated charge carriers in organic materials

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Keywords

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