Growth of ZnSnO3 nano-crystalloids on Sisubstrate by employing chemical bath deposition (CBD) technique for self-powered UV-light sensing applications

摘要

In the current work, UV-light sensing property of poly-crystalline Zinc-Tin-Oxide (ZnSnO3)nano-crystalloids grown by employing double-step chemical bath deposition technique has been investigated. The formation of cubic ZnSnO3 structure on p-Si [100] substrate has been confirmed by FESEM images. Crystallographic orientation and optical properties of such crystalloids are studied by X-ray diffraction, UV-VIS spectrophotometry and ellipsometric measurements. Absorption coefficient of the CBD-grown ZnSnO3 is obtained to be 2.1 × 10⁵/m, at the wavelength region corresponding to its band gap of 3.6 eV. The current-voltage (I-V) characteristic under both dark and illuminated condition reveals the ability of the self-biased heterojunction device to be used as UV-ray photo-detector.