Print ISSN: 1681-6900

Online ISSN: 2412-0758

Author : A. Mohammed, Modaffer

Optical and Optoelectric Properties in PbCdS Ternary Thin Films Deposited by CBD

J. P. Ponpon; Ali M. Musa; Modaffer A. Mohammed

Engineering and Technology Journal, 2010, Volume 28, Issue 6, Pages 1050-1060

PbxCd1-xS films have been prepared in the composition range of 0.05£ x£0.25
by using a chemical bath deposition growth technique under optimum conditions
to deposit good photo response. X-ray diffraction study results show that the films
are of PbS-CdS composite with individual CdS and PbS planes. The films
exhibited two direct band gaps, 2.4 eV belongs to CdS, and the second varies
continuously from 2.4eV to 1.3eV. The surface morphology of the films is smooth
with crystallite of increasing grain size with increasing the mole fraction (x). The
decrease in the band gap with increase in lead concentration suggests that the
Composite of PbS (Eg=0.41eV) with CdS (Eg=2.4eV).