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MoS2/PEDOT:PSS nanocomposite films for deep UV sensing: role of the radiation-induced trap** and localization of charges

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Abstract

We report the negative photoresponse or decreasing of current in nanocomposite film (NCF) based on poly(3,4-ethylenedioxythiophene) doped with poly(4-styrenesulfonate) (PEDOT:PSS) and molybdenum disulphide (MoS2) under deep UV (DUV) illumination. A reduction in the negative photoresponse may be shown after a critical concentration of MoS2 when studying the response by altering the MoS2 concentration in NCF. This uncommon behaviour concerns the localization and trap** of charges brought on by radiation. For the creation of MoS2 nanosheets, the hydrothermal technique is utilized. The structural characteristics of NCF are studied by X-ray diffraction. The bandgap difference brought on by the MoS2 addition is visible using UV spectroscopy. To understand the vibrational characteristics of produced samples, FT-IR investigations were also conducted. These will enable the use of NCF material in electrical, optical, and optoelectric devices. The results of this work broaden the range of viable DUV photodetectors materials and may lead to new directions in the investigation of the photoresponse of NCF.

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Acknowledgements

The author Arjun. K thanks the Ministry of Human Resource Development (MHRD), India, for granting the JRF to carry out this work. The author would be grateful to the National Institute Of technology Tiruchirappalli for the instrumentation facilities.

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  1. Nanophotonics Laboratory, Department of Physics, National Institute of Technology, Tiruchirappalli, 620 015, India

    K. Arjun & Balasubramanian Karthikeyan

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Arjun, K., Karthikeyan, B. MoS2/PEDOT:PSS nanocomposite films for deep UV sensing: role of the radiation-induced trap** and localization of charges. Appl. Phys. A 129, 543 (2023). https://doi.org/10.1007/s00339-023-06766-z

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