Results 231 to 240 of about 12,657 (265)

Surface photovoltage studies of multilayered structures

Journal of Electroanalytical Chemistry, 2003
Abstract Surface photovoltage (SPV) measurements were used to study InAs/GaAs multilayered structures. Two types of sample grown by molecular beam epitaxy were investigated: a quantum dot sample containing a fifteen-layer stack of InAs quantum dots (QD), each separated by GaAs layers, and a multi-quantum well sample.
C.F. de Souza, H.E. Ruda, S. Fafard
openaire   +1 more source

Surface photovoltage spectroscopy of porous silicon

Physical Review B, 1997
Results of surface photovoltage spectroscopy on free-standing porous silicon films fabricated from boron-doped Si wafers of various resistivities are presented. We find that all the films have bandtails, which are about 0.3 eV wide, and their optical band gap is about 2 eV.
L. Burstein, Y. Shapira, J. Partee, J. Shinar, Y. Lubianiker, I. Balberg   +5 more
openaire   +1 more source

Surface photovoltage spectroscopy of thin films

Journal of Applied Physics, 1996
The surface photovoltage (SPV) spectrum due to subband-gap illumination of thin films is theoretically studied. It is shown that this SPV is inherently sensitive to buried interfaces just as it is sensitive to the external semiconductor surface. The different contributions to the SPV from all the optically active gap states present within a sample ...
M. Leibovitch, L. Kronik, E. Fefer, L. Burstein, V. Korobov, Yoram Shapira   +5 more
openaire   +1 more source

Preparation of surface photovoltage VOC detector

International Conference on Instrumentation, Communication, Information Technology, and Biomedical Engineering 2009, 2009
We succesfully prepared the surface photovoltage sensor system using several types of modified mesoporous silica as a sensitive materials. The sensitive materials were fabricated using self-ordered and structure-controlled modified mesoporous thin films, which is synthesized by a molecule surfactant method using spin coating.
Brian Yuliarto, null Nugraha, Hao Shen Zhou   +2 more
openaire   +1 more source

Evaluation of surface photovoltage on silicon surfaces

2020
ABSTRACT EVALUATION OF SURFACE PHÛT0VÛLTA6E ÜNAL Emin M. S. i v'ı E I ect r i ca 1 arid E I «set ron i cs En a i nee r i n-a Supervisor: Assist. Prof. Dr. Müzeyyen SAR I TAS January, 1988.. 88 pa-aes The minority carrier diffusion lenath has been widely used to characterize the duality of silicon solar cell material before it is processed into ...
openaire   +1 more source

Surface photovoltage measurements on cadmium sulfide

Journal of Physics and Chemistry of Solids, 1962
Abstract Surface photovoltage measurements on conducting crystals of cadmium sulfide show that, at equilibrium, there is a difference in potential between the surface and the bulk of 0.2 to 0.3 eV. This is due to adsorbed oxygen which forms charged acceptor states on the surface. The adsorption is a reversible process and the oxygen may be removed by
openaire   +1 more source

Highly sensitive immunosensor with a surface photovoltage technique

Applied Biochemistry and Biotechnology, 1993
An ac surface photo voltage technique was successfully applied to construct a highly sensitive immuno-sensor by reducing the ion screening effect. A low noise amplification was attained by using a phase sensitive amplification technique, which made it possible to use low-ion density electrolyte leading to suppress the ion screening effect. The response
openaire   +2 more sources

Surface photovoltage investigations of

Surface Science Letters, 1990
S. Kuźminski, K. Pater, A.T. Szaynok
openaire   +1 more source

Integrative oncology: Addressing the global challenges of cancer prevention and treatment

Ca-A Cancer Journal for Clinicians, 2022
Jun J Mao,, Msce, Lorenzo Cohen, Karen M Mustian   +2 more
exaly  

Surface Photovoltage Spectroscopy of Semiconductor Nanostructures

2010
Surface Photovoltage Spectroscopy (SPS) [1] is a valuable method for the non-contact and non-destructive investigation of several semiconductor bulk properties, such as optical band-gap, defect-related optical transitions, minority carrier diffusion length and lifetime, Van Hove singularities or phase inhomogeneities. Moreover, SPS allows for obtaining
CAVALCOLI, DANIELA, CAVALLINI, ANNA
openaire   +1 more source