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F. I. EZEMA1, S. C. EZUGWU1,* , P. U. ASOGWA1, A. B. C. EKWEALOR1, R. U. OSUJI1
CdS films and CdS/TlS heterojunction were synthesized on the glass substrate by chemical bath deposition (CBD) within the pores of polyvinyl alcohol (PVA) at room temperature. The bath is made up of solutions of cadmium chloride (CdCl2), ammonia (NH3), thiourea (CS(NH2)2), and PVA for fabrication of CdS nanowires. TlS thin films were deposited on glass substrate using a bath that contains thallium nitrate, sodium citrate, sodium hydroxide, thiourea and PVA. For fabrication of CdS/TlS nanoflower CdS thin films were deposited on the TlS thin films. A chemical synthesis process for the fabrication of CdS nanowires and CdS/TlS nanoflower is presented herein. In this present work, these films were annealed in air at 373K and characterized for the structural, morphological, and optical properties. These properties were studied by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), and optical spectrophotometer. The optical properties revealed the presence of direct band gaps with energies 2.20eV for CdS and 1.80eV for CdS/TlS thin films. The films show poor transmittance in the visible and near infrared region of the solar spectrum.
CBD, CdS, CdS/TlS heterojunction, Nanowires, Nanoflowers, Optical studies.
F. I. EZEMA, S. C. EZUGWU, P. U. ASOGWA, A. B. C. EKWEALOR, R. U. OSUJI, Synthesis and characterization of CdS nanowires and CdS/TlS nanoflower grown in a polymer matrix by chemical bath deposition (CBD) method, Optoelectronics and Advanced Materials - Rapid Communications, 4, 5, May 2010, pp.747-750 (2010).
Submitted at: April 1, 2010
Accepted at: May 20, 2010
Optoelectronics and Advanced Materials - Rapid Communications
(2023): 0.5 - 2023 Journal Citation Reports (Clarivate Analytics, 2024)
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