Patent ID: 8586151
Filing Date: 2013-11-19
Classification: C23C

Abstract:
1. A process for the preparation of photo luminescent nanostructured silicon thin films comprising the steps of: (i) cleaning a substrate and placing it on an anode in a plasma enhanced chemical vapour deposition (PECVD) chamber, (ii) pumping said PECVD chamber to a base pressure of 10 (iii) heating the substrate at a temperature in the range of 180-250° C., (iv) depositing the nanostructured silicon thin film over the substrate by feeding hydrogen diluted silane gas (SiH (v) applying a radio frequency of 13.56 MHz to a cathode in said PECVD chamber, at a power density of 100-1000 mW/cm (vi) cooling said PECVD chamber to a temperature of 25-30° C., followed by breaking of vacuum by inserting nitrogen gas to obtain the desired nano structured silicon film.