Transformation of cadmium hydroxide to cadmium oxide thin films synthesized by SILAR deposition process: Role of varying deposition cycles

Peer review under responsibility of University of Bahrain.

Figures & data

Figure 4 Plot of absorbance against wavelength of CdO thin films deposited on microscope glass slide at three different deposition cycles.

Figure 5 Plot of transmittance against wavelength of CdO thin films deposited on microscope glass slide at three different deposition cycles.

Figure 1 EDX spectrum of the deposited film.

Figure 2 XRD patterns of CdO thin films prepared via SILAR method microscope glass slide at various deposition cycles.

Table 1 Comparison of d values (Å) and hkl plane for the CdO films.

Standard d values Å	Observed d values (Å) for the various cycles					Estimated crystallite size (Å) for the various cycles					hkl plane
	40	60	80	100	120	40	60	80	100	120
2.71	2.72	2.77	2.74	2.73	2.72	5.07	11.80	13.59	7.38	8.10	111
2.34	2.36	2.38	2.36	2.36	2.35	5.94	4.50	11.88	8.91	5.93	200
1.65	–	1.68	1.67	1.66	1.67	–	4.50	3.36	3.36	4.48	220
1.41	–	1.43	1.42	1.42	1.42	–	3.31	4.03	6.04	3.02	311
1.35	–	–	1.36	1.36	1.36	–	–	1.93	1.93	1.93	222

Figure 3 SEM micrographs of CdO thin films deposited on microscope glass after (a) 40 cycles (b) 60 cycles (c) 80 cycles (d) 100 cycles and (e) 120 cycles.

Figure 6 Variation in absorbtion coefficient with photon energy, (hν) for CdO thin films deposited via SILAR method at three different deposition cycles.

Figure 7 Plot of (αhν)² vs. photon energy (hν) for CdO thin films showing the direct band gap at 3.81 eV (60 cycles), 2.0 eV (100 cycles) and 1.85 eV (120 cycles).