Sindhu, H S and Maidur, Shivaraj R and Patil, Parutagouda Shankaragouda and Rajendra, B V (2020) Influence of structure and surface morphology on optical limiting property of spray pyrolyzed ZCO thin films. Chemical Physics Letters, 759. ISSN 00092614

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Abstract

The spray pyrolyzed Zn1−xCoxO (x = 0.01–0.10 at%) (ZCO) films showed polycrystalline nature with a prominent peak of (002) plane. Fibrous structure changes to the rice-grain type morphology with an increase in doping. XPS analysis confirmed the existence of Co ions in the +2 state. The transmittance and energy bandgap (Eg) of deposits reduces with an increase in doping level due to Co2+. The Z-scan technique was used to measure the third-order optical nonlinearities using DPSS CW laser at 532 nm excitation wavelength. The calculated third-order nonlinear susceptibility χ(3) is in the order of ~10−7 esu. The measured optical limiting threshold is in the range of 5.8–9.6 kJ/cm2 . The deposits can be used in light sensitive devices for optical limiter application

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