Computer simulations of the surface photovoltage on Si and GaAs surfaces with U-shaped surface state continuum

✍ Scribed by Boguslawa Adamowicz; Hideki Hasegawa

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 304 KB
• Volume: 54
• Category: Article
• ISSN: 0042-207X
• DOI: 10.1016/s0042-207x(98)00455-2

✦ Synopsis

Rigorous computer analysis of the bipolar surface photovoltage (SPV), including contribution of surface states with U-shaped density distribution and Dember photo-effect, was performed for n-Si and n-GaAs surfaces. The initial surface band bending was varied from accumulation to inversion (in terms of the surface fixed charge Q $! ), and incident photon flux density from 10 to 10 cm\ s. The behavior of SPV under weak and strong photo-excitation is discussed for possible use in surface characterization.