Direct observation of traps responsible for positive space charge in alternating-current thin-film electroluminescent devices

1999 ◽  
Vol 74 (8) ◽  
pp. 1120-1122 ◽  
Author(s):  
Alex N. Krasnov
Keyword(s):  
Thin Film ◽  
Space Charge ◽  
Direct Observation ◽  
Alternating Current ◽  
Electroluminescent Devices ◽  
Positive Space Charge ◽  
Positive Space

Evidence for space charge in atomic layer epitaxy ZnS:Mn alternating‐current thin‐film electroluminescent devices

1993 ◽  
Vol 73 (1) ◽  
pp. 296-299 ◽  
Author(s):  
A. A. Douglas ◽  
J. F. Wager ◽  
D. C. Morton ◽  
J. B. Koh ◽  
C. P. Hogh
Keyword(s):  
Thin Film ◽  
Space Charge ◽  
Atomic Layer ◽  
Alternating Current ◽  
Atomic Layer Epitaxy ◽  
Electroluminescent Devices

The Effect of Forming Gas Annealing on Pt/(Ba,Sr)TiO3/Pt Thin Film Capacitors for Future Dram Applications: Electrical Properties and Degradation Mechanisms

2000 ◽  
Vol 655 ◽  
Author(s):  
J. D. Baniecki ◽  
C. Parks ◽  
R.B. Laibowitz ◽  
T. M. Shaw ◽  
J. Lian
Keyword(s):  
Thin Film ◽  
Electrical Properties ◽  
Space Charge ◽  
Current Density ◽  
Applied Voltage ◽  
Capacitance Density ◽  
Positive Space Charge ◽  
Thin Film Capacitors ◽  
Positive Space ◽  
Gas Exposure

AbstractWe have used electrical characterization and secondary ion mass spectroscopy (SIMS) to investigate the influence of hydrogen or deuterium (H/D) on the degradation of the electrical properties of Pt/Ba0.7Sr0.3TiO3/Pt thin film capacitors after forming gas exposure. Deuterium SIMS depth profiling shows that high deuterium concentrations can be incorporated into Pt/BSTO/Pt capacitors after forming gas annealing. The increase in H/D concentration in the film is accompanied by an increase in the leakage and dielectric relaxation current density. Voltage offsets in the capacitance-applied voltage (C-VA) characteristics after forming gas exposure at lower temperatures (20 °C) and a suppression in the capacitance density near zero applied D.C. bias after forming gas exposure at higher temperatures, suggests that one effect of forming gas exposure to Pt/BSTO/Pt thin film capacitors is to introduce positive space charge into the BSTO film. Using an equivalent model for a ferroelectric thin film capacitor, which incorporates lower permittivity interfacial layers and a nonlinear electric field-electric displacement relationship for the film interior, the effects of a uniform distribution of positive space charge on the theoretical C-VA and current density applied voltage (J-VA) characteristics are investigated. It is shown the model can account for many of the observed changes that occur in the experimental C-VA and J-VA characteristics after forming gas exposure.

Static space charge in evaporated ZnS:Mn alternating-current thin-film electroluminescent devices

1998 ◽  
Vol 83 (2) ◽  
pp. 1141-1145 ◽  
Author(s):  
J. C. Hitt ◽  
P. D. Keir ◽  
J. F. Wager ◽  
S. S. Sun
Keyword(s):  
Thin Film ◽  
Space Charge ◽  
Alternating Current ◽  
Electroluminescent Devices ◽  
Static Space

Space charge generation in ZnS:Mn alternating‐current thin‐film electroluminescent devices

1995 ◽  
Vol 78 (9) ◽  
pp. 5775-5781 ◽  
Author(s):  
S. Shih ◽  
P. D. Keir ◽  
J. F. Wager ◽  
J. Viljanen
Keyword(s):  
Thin Film ◽  
Space Charge ◽  
Alternating Current ◽  
Charge Generation ◽  
Electroluminescent Devices

Space charge and excitation efficiency in ZnS thin film electroluminescent devices

1994 ◽  
Vol 138 (1-4) ◽  
pp. 1023-1027 ◽  
Author(s):  
A. Zeinert ◽  
P. Benalloul ◽  
J. Benoit ◽  
C. Barthou ◽  
H.-E. Gumlich
Keyword(s):  
Thin Film ◽  
Space Charge ◽  
Electroluminescent Devices ◽  
Excitation Efficiency

The structure of the impulse corona in a rod/plane gap I. The positive corona

1970 ◽  
Vol 315 (1520) ◽  
pp. 1-25 ◽  
Keyword(s):  
Spatial Distribution ◽  
Electric Field ◽  
Space Charge ◽  
Negative Ions ◽  
Corona Discharges ◽  
Theoretical Derivation ◽  
Plane Electrode ◽  
Positive Space Charge ◽  
Positive Ion ◽  
Positive Space

The dissipation of space charge following the growth of impulse corona discharges in positive rod/earthed plane gaps has been measured with an electrostatic fluxmeter. A method is described to determine the spatial distribution and magnitude of the space charge together with the associated electric field. Initial positive ion densities of up to 100 μC m -3 have been found. The total positive space charge deposited in a 40 cm gap at 160 kV is 500 nC. Electrons emitted from the plane electrode as a result of corona channels crossing the gap are shown to be trapped in the discharge space as negative ions. The recovery of the gap over several seconds is largely due to ionic drift to the electrodes. A theoretical derivation of the rate of deionization agrees with observed values.

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