Author :
Publisher :
ISBN 13 :
Total Pages : 27 pages
Book Rating : 4.:/5 (871 download)
Book Synopsis Identifying Electronic Properties Relevant to Improving Stability in A-Si by :
Download or read book Identifying Electronic Properties Relevant to Improving Stability in A-Si written by and published by . This book was released on 1995 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes work performed by the University of Oregon focusing on the characterization and evaluation of amorphous semiconductor materials produced by novel deposition conditions and/or methods. The results are based on a variety of junction capacitance techniques: admittance spectroscopy, transient photocapacitance (and photocurrent), and drive-level capacitance profiling. These methods allow the determination of deep defect densities and their energy distributions, Urbach bandtail energies, and, in some cases, [mu][tau] products for hole transport. During this phase, the authors completed several tasks: (1) they carried out measurements on a-Si, Ge:H alloy samples produced at Harvard University by a cathodic glow discharge process, measurement indicated a smaller value of ([mu][tau]){sub h} for these samples than would have been expected given their lower defect densities; (2) they characterized several hot-wire a-Si:H samples produced with varying hydrogen levels, studies indicate that hot-wire-produced a-Si:H, with H levels between 2--5 at.% should lead to mid-gap devices with superior properties; (3) they reported some results on a-Si:H glow discharge material grown under hydrogen dilution conditions. Preliminary studies point to film strain as playing a primary role for the observed differences in behavior.
