Effect of Acid Treatment in Dye Loading Capacity of Spin Coated ZnO Film

Authors

  • Harka Bahadur Baduwal Amrit Campus, Tribhuvan University, Kathmandu, Nepal
  • Pitamber Shrestha Amrit Campus, Tribhuvan University, Kathmandu, Nepal
  • Dinesh Kumar Chaudhary Amrit Campus, Tribhuvan University, Kathmandu, Nepal
  • Deependra Das Mulmi Nepal Academy of Science and Technology, Khumaltar, Nepal
  • Leela Pradhan Joshi Amrit Campus, Tribhuvan University, Kathmandu, Nepal

DOI:

https://doi.org/10.3126/arj.v1i1.32460

Keywords:

ZnO, Polycrystalline structure, Acid treatment, Optical band gap

Abstract

In recent times, the research on ZnO is growing tremendously, because of its potential use in many applications such as optical devices, dye sensitized solar cell (DSSC), gas sensors and biomedical. ZnO thin films of various thicknesses were prepared by the spin coating method using the zinc acetate precursor with diethanolamine and ethanol. The structural and optical characterizations of as-prepared ZnO films carried out using XRD and UV-Vis spectrophotometer, respectively. The XRD results showed polycrystalline wurtzite structure of ZnO. The average crystallite size of ZnO as calculated using Debye Scherrer’s formula was 26 nm. The optical band gap of ZnO was found to decrease with film thickness. The dye extracted from the leaves of Tectona Grandis (Sagun) which possesses a high and wide absorbance was used in this experiment. The study on the effect of acid treatment on ZnO films in dye loading showed enhanced absorbance in acid treated ZnO as compared to untreated ZnO.

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Author Biographies

Harka Bahadur Baduwal, Amrit Campus, Tribhuvan University, Kathmandu, Nepal

Physics Department

Pitamber Shrestha, Amrit Campus, Tribhuvan University, Kathmandu, Nepal

Physics Department

Dinesh Kumar Chaudhary, Amrit Campus, Tribhuvan University, Kathmandu, Nepal

Physics Department and 3Central Department of Physics, Tribhuvan University, Kirtipur, Nepal

Deependra Das Mulmi, Nepal Academy of Science and Technology, Khumaltar, Nepal

Nanomaterials Research Laboratory

Leela Pradhan Joshi, Amrit Campus, Tribhuvan University, Kathmandu, Nepal

Physics Department

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Published

2020-09-17

How to Cite

Baduwal, H. B., Shrestha, P., Chaudhary, D. K., Mulmi, D. D., & Joshi, L. P. (2020). Effect of Acid Treatment in Dye Loading Capacity of Spin Coated ZnO Film. Amrit Research Journal, 1(1), 95–100. https://doi.org/10.3126/arj.v1i1.32460

Issue

Vol. 1 No. 1 (2020)

Section

Articles