Measuring electron and hole mobilities in organic systems: Charge selective CELIV

Gao, Yajun, Pivrikas, Almantas, Xu, Bin, Liu, Yang, Xu, Weiqing, Van Loosdrecht, Paul H. M and Tian, Wenjing (2015) Measuring electron and hole mobilities in organic systems: Charge selective CELIV. Synthetic Metals, 203 187-191. doi:10.1016/j.synthmet.2015.02.036


Author Gao, Yajun
Pivrikas, Almantas
Xu, Bin
Liu, Yang
Xu, Weiqing
Van Loosdrecht, Paul H. M
Tian, Wenjing
Title Measuring electron and hole mobilities in organic systems: Charge selective CELIV
Journal name Synthetic Metals   Check publisher's open access policy
ISSN 0379-6779
Publication date 2015-05
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.synthmet.2015.02.036
Open Access Status
Volume 203
Start page 187
End page 191
Total pages 5
Place of publication Lausanne, Switzerland
Publisher Elsevier S.A
Collection year 2016
Language eng
Formatted abstract
We report on the realization of charge selective CELIV (charge extraction by linearly increasing voltage) via the selective extraction of each charge carrier species in a SiO2 inserted MIS (metal-insulator-semiconductor) structure. The experiments are performed in a typical active layer of P3HT (poly (3-hexylthiophene)):PCBM (phenyl C61-butyric acid methyl ester) with a composition ratio of 1:1. The presence of double CELIV peaks indicates the involvement of deep trap states in the charge transport process. Furthermore the difference in excitation intensity dependence between photo-excited holes and electrons suggests a difference in population probabilities of electrons and holes for shallow and deep trap states. Charge selective CELIV experiments also show that the simultaneous extraction of holes and electrons is not a simple linear superposition of the cases where they are extracted separately, indicating that a fraction of photo-excited charges populating shallow trap states can escape from the device.
Keyword Charge selective CELIV
Specific mobility
Organic semiconductors
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2016 Collection
School of Chemistry and Molecular Biosciences
 
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