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- Title
Effect of thermal annealing and cooling rate on CBD grown CdS thin films.
- Authors
Shaikh, Raees A. Gani; More, Sagar A.; Bisen, Gauri G.; Jadkar, Sandesh R.; Sali, Jaydeep V.; Ghosh, Sanjay S.
- Abstract
CdS films were deposited by CBD on a glass substrate by using CdI2 as a Cd+ source, thiourea as an S− source and NH4OH as the complexing agent. The effect of slow and rapid cooling on the films after thermal annealing was investigated in the present study. X-ray diffraction and Raman spectra of the films suggest that thermal annealing followed by slow cooling gives CdS with enhanced crystallinity and reduced strain and dislocation density as compared to the films where they were cooled rapidly after thermal annealing. The results were supported by scanning electron microscopy and UV–Vis absorption spectroscopy. Hall Effect measurement shows the lowest resistivity and highest mobility obtained in the case of a slowly cooled sample as compared to the rapidly cooled sample. Carrier concentration in the range of about 1011 (cm−3) was found, and all the samples of CdS were of n-type conductivity.
- Subjects
THIN films; HALL effect; CARRIER density; DISLOCATION density; RAMAN spectroscopy
- Publication
Journal of Materials Science: Materials in Electronics, 2019, Vol 30, Issue 23, p20354
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-019-02238-4