Zinc Oxide Poly Crystals Heterojunction and Infrared- Blind UV-Photodetector

Authors Saif Khalel Jasim1,2, Ahmed M. Shano2 , Suzan K. Adnan1

1Ministry of Education, Diyala Education Directorate, Diyala, Iraq

2Department of Radiological Tech., Bilad Alrafidain University College, 32001 Diyala, Iraq

Е-mail dr.ahmed.alaskari89@gmail.com
Issue Volume 16, Year 2024, Number 1
Dates Received 13 December 2023; revised manuscript received 17 February 2024; published online 28 February 2024
Citation Saif Khalel Jasim, Ahmed M. Shano, Suzan K. Adnan, J. Nano- Electron. Phys. 16 No 1, 01012 (2024)
DOI https://doi.org/10.21272/jnep.16(1).01012
PACS Number(s) 61.05.C –, 77.84.Bw
Keywords p-PSi/ZnO, PCM, X-ray diffraction (19) , ECE, UV-Photo detector.

In this work, we used electrochemical etching of p-type silicon wafers for 10 min at a current density of 10 mA cm – 2 to obtain p-type porous silicon. Zinc oxide nanoparticles were produced using a chemical precipitation method (CPM) and applied to (glass, PSi) substrates using (DCM). XRD and UV-Vis have also been used to study the properties of films (structural and optical). According to the XRD data, the ZnO NPs are wurtzite-structured polycrystalline, with a favored orientation along the (101) plane. The size of the ZnO NP crystals was measured by the Scherrer formula and the crystal size was found to be 22.04 nm. Images and distribution plots obtained using atomic force microscopy (AFM) indicated that the p-PSi had a particle size of approximately 47.22 nm and a porosity of (48 %). An ultraviolet (MS) detector based on porous (Si)/ZnO NPs (metal semiconductor) was fabricated at a temperature of (85 °C). The fabricated device showed a maximum detector photoresponse of 2.08 A/W at a wavelength of 450 nm at a bias voltage (+3.35 V). The factory-made UV ZnO detector has a normalized detection (D*) of approximately (2.9 1013) cm. 1/2 Hz/W at ( = 450 nm). This approach provides an economical substrate and a facile synthetic method for optimizing the growth of pPSi/ZnO NPs, This has led to the successful fabrication of nanoscale photodetectors with potential applications for nanoscale photodetectors is displayed.

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