Document Details Document Type : Article In Journal  Document Title : A study on photo-induced crystallization in Ga10Se78Tl12 thin films A study on photo-induced crystallization in Ga10Se78Tl12 thin films   Subject : physics  Document Language : English  Abstract : This paper reports the photo-induced crystallization in glassy Ga10Se78Tl12 thin films. The glassy nature of the bulk material was confirmed by non-isothermal differential scanning calorimetry measurements. The photo-induced crystallization in Ga10Se78Tl12 films was done by exposing to light (using 2000 W tungsten lamp) at various illumination times under the fixed ambient temperature at 358 K. Virgin and photo-induced Ga10Se78Tl1 thin films were characterized by X-rays diffraction, scanning electron microscopy, optical and electrical measurements. The photo-induced crystallization is associated to the change in structure of Ga10Se78Tl12 thin films which initiated the significant change in the optical constants. The detailed examination of the optical absorption results indicated that the optical transition was indirect. The optical band gap of Ga10Se78Tl12 thin films were decreased while the absorption and the extinction coefficients increased with the increase of illumination time. From dark conductivity results, the dark conductivities of thin films continuously heightened and the activation energy turned to be lower as increasing the illumination time. The lowering in optical band gap and activation energy might be due to the occurrence of photo crystallization with the increment of illumination time.  ISSN : 0957-4522  Journal Name : JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS  Volume : 26  Issue Number : 8  Publishing Year : 1435 AH 2015 AD  Article Type : Article  Added Date : Sunday, August 20, 2017  Researchers Researcher Name (Arabic) Researcher Name (English) Researcher Type Dr Grade Email R.P Tripathi Tripathi, r.P Investigator Doctorate   M.S Akhtar Akhtar, M.S Researcher Doctorate   M. A Alvi Alvi, M. A Researcher Doctorate   S Khan Khan, S Researcher   shamshad_phys@yahoo.com Files File Name Type Description  42693.pdf pdf   Back To Researches Page