Hole transport dithiophene-benzene copolymer for electroluminescence devices

We have investigated the effect of heat treatment on optical and electronic properties for thin films of solution-soluble dithiophene-benzene copolymer (DTB). Thermal annealing affected the electroluminescence (EL) performance of the DTB thin films, as well as charge carrier transport properties of...

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Bibliographic Details
Published inJapanese Journal of Applied Physics Vol. 59; no. SC; p. SCCA01
Main Authors Tachibana, Hiroaki, Toda, Naoya, Takada, Noriyuki, Chikamatsu, Masayuki, Azumi, Reiko
Format Journal Article
LanguageEnglish
Published Tokyo IOP Publishing 01.02.2020
Japanese Journal of Applied Physics
Subjects
Atomic force microscopy
Benzene
Carrier transport
Charge transport
Copolymers
Current carriers
Electroluminescence
Heat treating
Heat treatment
Hole mobility
Hydrocarbons
Optical properties
Semiconductor devices
Thin film transistors
Thin films
Transport properties
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Summary:We have investigated the effect of heat treatment on optical and electronic properties for thin films of solution-soluble dithiophene-benzene copolymer (DTB). Thermal annealing affected the electroluminescence (EL) performance of the DTB thin films, as well as charge carrier transport properties of DTB-based thin film transistors (TFTs). The DTB-TFT exhibited the optimum hole mobility by heating the film at 100 °C. Atomic force microscopy showed morphological change with larger domains by heating; slightly increased crystallinity of the film was observed by X-ray diffraction after heat treatment at 100 °C. Consequently, the EL performance was significantly improved for DTB device by heat treatment at 100 °C.
Bibliography:JJAP-S1101130.R2
ISSN:0021-4922
1347-4065
DOI:10.7567/1347-4065/ab4aa0