ABSTRACT: ZnO thin films doped with dyes from Eupatorium Odorata, Ageratum Conyzoides and Pucro pueraria was successfully deposited on a glass substrate using solution growth techniques. The grown films were characterized using spectrophotometer to determine the optical and solid state properties. Spectrophotometric analysis of the grown films shows very high absorbance in the UV region, moderate in the VIS region and low in the NIR region for all the films. The optical properties studied include absorbance, transmittance, reflectance, absorption coefficient and band gap. This properties were affected greatly by thermal annealing. The optical analysis of ZnO thin films indicate that absorbance is ≤ 2.3, transmittance is ≤ 78%, absorption coefficient varied from 0.25 x 106m-1 to 6 X 106m-1, band gap decreases from 4.01eV for Dye C to 3.90eV for Dye B to 3.86eV for Dye A and 3.84eV for As-deposited. High transmittance of ZnO thin films in the infrared region exhibited by the films suggest that the.......
Key word - Dye, Doping and Spectrophotometer
[1]. Agbo, P. E., Nwofe, P.A. and Odo, L.O. (2017). Analysis on energy gap of zinc sulphide (ZnS) thin films grown by solution growth technique, Chalcogenide Letters, 14 (8), 357-363.
[2]. Ajuba, A. E., Ezeugwu, S.C., Asogwa, P. U. and Ezema, F.I. (2010). Chalcogenide Letters, 10(7), 573-579.
[3]. Augustine, C., Nnabuchi, M. N., Anyaegbunam, F.N.C and Nwachukwu, A. N. (2017). Study of the effects of thermal annealing on some selected properties of Heterojunction PbS-NiO core-shell thin film, Digest Journal of Nanomaterials and Biostructures, 12(2), 523-531 (2017)
[4]. Augustine, C. and Nnabuchi, M.N. (2017). Band gap determination of chemically deposited leadsulphide based heterojunction thin films, Journal of Non-Oxide Glasses, 9(3), 85-98.
[5]. Baruah, S. and Dutta, J. (2009). "Hydrothermal Growth of ZnO Nanostructures," Science and Technology of Advanced Materials, 10 (1), Article ID: 013001.
