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Comparative studies on p-type CuI grown on glass and copper substrate by SILAR method

2010; Elsevier BV; Volume: 256; Issue: 12 Linguagem: Inglês

10.1016/j.apsusc.2010.01.058

1873-5584

Sunetra L. Dhere, Sanjay S. Latthe, Charles Kappenstein, S. Mukherjee, A. Venkateswara Rao,

Quantum Dots Synthesis And Properties

Depending upon the method of synthesis and the nature of substrate surface, there is variation in the physico-chemical properties of the material. Cuprous iodide films are deposited at room temperature on the glass and copper substrates by a simple SILAR method and the obtained results are compared. The p-type material with optical band gap 2.88 eV is found to be possessing face-centered cubic crystal structure with lattice parameter 6.134 Å. We observed irregular particles for the CuI film on the glass substrate while patterned arrays of micro-rods with cabbage like tips on copper substrate, for the same preparative conditions. Also, the material deposited on copper is showing superhydrophobic nature (contact angle ∼156°) while that on glass it is hydrophilic (contact angle ∼88°). We have characterized the thin films by X-ray diffraction, scanning electron microscopy, surface roughness and contact angle measurement, thermoelectric power measurement and optical studies. This hydrophobic, p-type material with wide band gap will be helpful in the development of optoelectronic devices.