Photoconductivity

Abstract

The sections in this article are Basic Photoconductivity Processes Photoconductivity Parameters Types of Photoconducting Systems Examples of Recombination Models Recombination Effects for two Types of Imperfections Recombination Processes Steady‐State Photoelectronic Analysis Transient Photoelectronic Analysis Quantum Wells and Superlattices Acknowledgment

Calculations for antiferrodistortive phase of SrTiO3perovskite: hybrid density functional study

“…This peculiarity arises because the lowest in energy, indirect phonon-assisted R → optical transition is weak in a cubic phase (above the phase transition) and therefore practically does not affect the photoconductivity spectra maximum. However, our theoretical analysis shows that in the AFD phase this transforms into the direct → transition whose probability is known to be much larger [31]. For this reason, this transition begins to play an important role in the shape of the photoconductivity spectra.…”

In situ electrical characterization of dielectric thin films directly exposed to plasma vacuum-ultraviolet radiation

“…The measured data can be fitted to a simple photoconductor model 12 to determine the conductivity of SiO 2 layers under exposure to plasma radiation. This model is defined by the following expression: where is the ionizing radiation flux with energies higher than the energy bandgap of SiO 2 ͑approximately 9 eV͒, E ox is the electric field across the oxide layer (E ox ϭV ox /t ox ), t ox is the oxide thickness, and C is a fitting parameter.…”

Role of Contact and Contact Modification on Photo-response in a Charge Transfer Complex Single Nanowire Device

“…Nanotubes, nanowires and nanobelts are important one-dimensional (1D) nanomaterials that are the foundation for nanoscience and nanotechnology [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Novel nanoscale optoelectronic devices are important applications of nanomaterials, particularly nanowires which can be scaled down to a single nanowire (NW) device [1][2][3][4][5][6][7][8][9][10][11][12].…”

“…Novel nanoscale optoelectronic devices are important applications of nanomaterials, particularly nanowires which can be scaled down to a single nanowire (NW) device [1][2][3][4][5][6][7][8][9][10][11][12]. Contact electrodes play an important role in improving performance of nanoscale devices [1][2].…”

“…In general a photoconductive gain G > 1 is seen in devices with good Ohmic contact at the metal-semiconductor interface. It is generally believed that in photo detectors with blocking contact at the metal-semiconductor junction, it is not possible to obtain a photoconductive gain G > 1 [6][7][8]. As a reTheme Unit of Excellence in Nano Device Technology and Department of Condensed Matter Physics and Materials Science, S.N.…”