Abstract
This study demonstrates the charge transport properties of Tris[4-(diethylamino) phenyl]amine (TDAPA) in the frequency and temperature range of 0.1 Hz–1 MHz and 253–333 K, respectively using impedance spectroscopy. X-ray diffraction patterns of TDAPA powder and thin film indicate the polycrystalline nature of the studied material. The depressed semicircle in Nyquist’s plot indicates a non-Debye-type relaxation mechanism. The Almond-West power law and the Jump relaxation model were applied to investigate the charge transport and hopping mechanism. The exponent value was calculated and found well within range and the dc conductivity was determined using the same. Activation energy corresponding to dc conductivity and hopping was calculated and found to be 0.37 eV and 0.31 eV, respectively. The temperature-dependent behaviour of the exponent (s) is investigated in detail. The charge carrier mobility of TDAPA was also calculated by fabricating an organic field effect transistor in bottom gate top contact geometry on Si/SiO2 substrate. OFET characteristics of the material indicate the p-type behaviour with charge carrier mobility of 5.14 × 10−4cm2/Vs, 2.36 Vs, the threshold voltage of 33.61 V, and 2.19 × 103 On/Off.
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Acknowledgements
One of the authors, Amit Kumar, acknowledges the financial support provided by the Science and Engineering Research Board (SIRE), Department of Science and Technology, New Delhi and University Grant Commission, New Delhi in form of the projects SIR/2022/000703 and 30-545/2021(BSR), respectively.
Funding
This work was supported by Department of Science and Technology, New Delhi (Grant No. SIR/2022/000703) and University Grant Commission, New Delhi (IN) (Grant No. 30-545/2021(BSR)).
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SSD: conceptualization, methodology, formal analysis, investigation, writing original draft, data curation, AN: supervision and guidance, AS: formal analysis, reviewing and editing, RP: reviewing and editing, supervision, resources, validation, AK: funding acquisition, reviewing and editing, supervision, resources, validation.
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Dhayal, S.S., Nain, A., Punia, R. et al. Charge transport studies of tris[4-(diethylamino)phenyl]amine and OFET application. J Mater Sci: Mater Electron 34, 1556 (2023). https://doi.org/10.1007/s10854-023-10926-5
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DOI: https://doi.org/10.1007/s10854-023-10926-5