Journal ArticleDOI
Discharge Characteristics of Photoconducting Insulators
Reads0
Chats0
TLDR
In this article, a modified method for the determination of mobility where one surface of the sample is grounded and the other is left floating is described, where the floating surface is charged to an initial voltage, V0 and its subsequent decay upon exposure to intense light is observed experimentally.Abstract:
The conventional technique for the measurement of mobility sandwiches the sample between two electrodes, at least one of which is transparent. The sample is illuminated through this surface and the resultant current is measured under constant voltage conditions. In the present work we describe a modified method for the determination of mobility where one surface of the sample is grounded and the other is left floating. The floating surface is charged to an initial voltage, V0 and its subsequent decay upon exposure to intense light is observed experimentally. The relation between the instantaneous surface voltage V(t) and the exposure time t is referred to as the ``photoinduced discharge characteristic'' (PIDC) of the photoconductor plate. Knowing the PIDC and the theoretical expressions derived in this paper one can obtain an accurate value for the mobility of the charge carriers. As verification of our analysis we have measured the PIDC of amorphous Se films deposited onto Al substrates. Both the surface...read more
Citations
More filters
Journal ArticleDOI
Corona charging of polymers
TL;DR: A review of the corona charging of polymers is presented in this paper, where the main contributions arising from research on Teflon FEP and ferroelectric polymers, in which a constant-current corona triode was used.
Journal ArticleDOI
Surface‐Charge Decay in Insulators with Nonconstant Mobility and with Deep Trapping
TL;DR: In this paper, the motion of space charge initially located at the free surface of an insulator is studied as a function of time, and the available experimental data for polyethylene do not fit these simple models, and discrepancies are discussed.
Journal ArticleDOI
Hole-transporting hydrazones
TL;DR: This tutorial review covers recent contributions in the area of hole-transporting hydrazones, which are widely used in optoelectronic devices and the relationships between the molecular structures and properties are emphasized.
Journal ArticleDOI
The energy distribution of trapped charges in polymers based on isothermal surface potential decay model
TL;DR: In this article, a model based on isothermal surface potential decay (ISPD) is proposed to study the distribution of trapped charges by considering the physical mechanism of the detrapping process.
References
More filters
Journal ArticleDOI
Space‐Charge‐Limited Currents in Organic Crystals
Peter Mark,Wolfgang Helfrich +1 more
TL;DR: In this article, the acceptor electrode can form ohmic contact for hole injection into these crystals and that space-charge-limited currents can be drawn through them, which strongly indicates that the acceptors electrode can strongly indicate that the hole mobility in p−terphenyl is about 3×10−2 cm2/v sec, is independent of the field at least up to about 4×104 v/cm, and the hole trap concentration is at least 1013 cm−3.
Journal ArticleDOI
Drift mobility techniques for the study of electrical transport properties in insulating solids
TL;DR: In this article, a platelet specimen is fitted with electrodes on opposite sides and charge carriers are generated near the top electrode by a fast excitation pulse, and a steady or pulsed applied field draws one type of carrier across the specimen and the transit time is determined either by charge integration or from the observed current transient.
Journal ArticleDOI
Drift Mobilities of Electrons and Holes and Space-Charge-Limited Currents in Amorphous Selenium Films
TL;DR: In this article, the authors measured drift mobility and space-charge-limited drift mobilities on 20-micronthick films of amorphous Se using the band model of a semiconducting solid with impurity or imperfection levels in the forbidden energy region between conduction and valence bands.
Journal ArticleDOI
Field-Controlled Photogeneration and Free-Carrier Transport in Amorphous Selenium Films
Mark D. Tabak,Peter J. Warter +1 more
TL;DR: In this article, the photogeneration and transport of free carriers in amorphous selenium films were studied under varying conditions of thickness, wavelength of the exciting radiation, and applied electric field.
Journal ArticleDOI
Photoinduced Discharge Characteristics of Amorphous Selenium Plates
H. Tung Li,Paul J. Regensburger +1 more
TL;DR: In this article, a theoretical model was developed to account for the observed photoinduced discharge characteristics of amorphous selenium plates, taking into account not only the bulk trapping of the mobile carriers, but also the recombination of the photogenerated holes and electrons.
Related Papers (5)
Surface‐potential decay in insulators with field‐dependent mobility and injection efficiency
T. J. Sonnonstine,M. M. Perlman +1 more