What question did this study set out to answer?

To assess the validity and accuracy of determining trap depth and density from space-charge-limited current measurements in insulating materials.

May 1, 1962Journal of Applied Physics

Trap Density Determination by Space-Charge-Limited Currents

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Authors

RBRichard H. BubeNational Renewable Energy Laboratory

Discussion

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Implication

Comparative experimental analysis demonstrates accurate trap parameter evaluation in cadmium sulfide crystals, highlighting the necessity of accounting for field ionization and double injection.

Key Points

To assess the validity and accuracy of determining trap depth and density from space-charge-limited current measurements in insulating materials.
Analyzed the dependence of space-charge-limited currents on applied electric fields in a single crystal of cadmium sulfide.
Compared extracted trap parameters against independent benchmark measurements obtained from thermally stimulated currents and photocurrent decay on the same crystal.
Attributing the rapid current rise toward the trap-free curve solely to complete trap filling leads to gross errors in calculated trap depths and densities.
Rapid current escalation can instead arise from electric-field ionization of traps or the onset of double injection.
Comprehensive analysis accounting for field ionization and double injection yields trap depth and density values completely consistent with thermally stimulated current and photocurrent decay data.

Cite This Study

Richard H. Bube (1962) studied this question.

synapsesocial.com/papers/69dd67dd80eea7d3f699c96c https://doi.org/10.1063/1.1728818

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May 1, 1962Journal of Applied Physics

Trap Density Determination by Space-Charge-Limited Currents

View Full Paper

Ask AI

Bookmark

Authors

RBRichard H. BubeNational Renewable Energy Laboratory

Discussion

Member takes

Implication

Comparative experimental analysis demonstrates accurate trap parameter evaluation in cadmium sulfide crystals, highlighting the necessity of accounting for field ionization and double injection.

Key Points

To assess the validity and accuracy of determining trap depth and density from space-charge-limited current measurements in insulating materials.
Analyzed the dependence of space-charge-limited currents on applied electric fields in a single crystal of cadmium sulfide.
Compared extracted trap parameters against independent benchmark measurements obtained from thermally stimulated currents and photocurrent decay on the same crystal.
Attributing the rapid current rise toward the trap-free curve solely to complete trap filling leads to gross errors in calculated trap depths and densities.
Rapid current escalation can instead arise from electric-field ionization of traps or the onset of double injection.
Comprehensive analysis accounting for field ionization and double injection yields trap depth and density values completely consistent with thermally stimulated current and photocurrent decay data.

Cite This Study

Richard H. Bube (1962) studied this question.

synapsesocial.com/papers/69dd67dd80eea7d3f699c96c https://doi.org/10.1063/1.1728818

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