ESR and Raman Studies on Hydrogenated Amorphous Si–Sn

Abstract
Results of electron spin resonance (ESR) and Raman scattering measurements are reported for hydrogenated amorphous Si–Sn (a-Si1-x Sn x :H) films prepared by r.f. sputtering of planar-magnetron type at a substrate temperature of 100°C. Sn dangling bonds are observed by ESR measurement in a–Si1-x Sn x :H films. This is the first observation of Sn dangling bonds by ESR. In Raman spectra, Si–Si, Si–Sn and Sn–Sn vibrational bands are observed at 480, 310 and 150 cm-1, respectively.