Charge transport and recombination in heterostructure organic light emitting transistors

Maasoumi, Fatemeh, Ullah, Mujeeb, Shaw, Paul E., Li, Jun, Burn, Paul L., Meredith, Paul and Namdas, Ebinazar B. (2015) Charge transport and recombination in heterostructure organic light emitting transistors. Organic Electronics, 25 37-43. doi:10.1016/j.orgel.2015.05.051

Author Maasoumi, Fatemeh
Ullah, Mujeeb
Shaw, Paul E.
Li, Jun
Burn, Paul L.
Meredith, Paul
Namdas, Ebinazar B.
Title Charge transport and recombination in heterostructure organic light emitting transistors
Journal name Organic Electronics   Check publisher's open access policy
ISSN 1566-1199
Publication date 2015-10
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.orgel.2015.05.051
Open Access Status
Volume 25
Start page 37
End page 43
Total pages 7
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2016
Language eng
Abstract Light-emitting field effect transistors (LEFETs) are a class of organic optoelectronic device capable of simultaneously delivering the electrical switching characteristics of a transistor and the light emission of a diode. We report on the temperature dependence of the charge transport and emissive properties in a model organic heterostructure LEFET system from 300 K to 135 K. We study parameters such as carrier mobility, brightness, and external quantum efficiency (EQE), and observe clear thermally activated behaviour for transport and injection. Overall, the EQE increases with decreasing temperature and conversely the brightness decreases. These contrary effects can be explained by a higher recombination efficiency occurring at lower temperatures, and this insight delivers new knowledge concerning the optimisation of both the transport and emissive properties in LEFETs.
Keyword Charge transport
Organic semiconductors
Light emitting transistors
Activation energy
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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