Structural and Optical Behaviour of Ni Doped CdS Nanoparticles Synthesized by Chemical Co-Precipitation Method

K. Siva Kumara, A. Divyaa, P. Sreedhara Reddya, S. Uthannaa, R. Martinsb and E. Elangovanb aDepartment of Physics, Sri Venkateswara University, Tirupati - 517 502, India bCENIMAT/I3N, Departemento de Ciencia dos Materiais, Faculdade de Cienciase Technolgia, FCT, Universidade Nova de Lisboa and CEMOP/UNINOVA, 2829-516 Caparica, Portugal

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Pure and Ni (2 at.%) doped cadmium sulfide (CdS) nanoparticles have been synthesized by chemical co-precipitation method at room temperature. Effect of Ni doping on CdS compound semiconductors has been analyzed using X-ray diffractometer, transmission electron microscope, energy dispersive spectroscopy, Raman and optical absorption studies. X-ray diffraction study confirmed the structure of the obtained nanoparticles to be single-phase zinc blende with the diffractions from (111), (220) and (311) planes. Energy dispersive spectroscopy study confirmed the presence of Ni in the CdS lattice. The average particle size obtained from the transmission electron microscopy studies are in agreement with the crystallite size calculated from X-ray diffraction data. The optical studies exhibited a clear red shift of absorption edge as a function of Ni doping.

DOI: 10.12693/APhysPolA.120.A-52 PACS numbers: 61.05.Cp, 61.72.-y, 78.55.Et, 78.67.Bf