2020
DOI: 10.1103/physrevapplied.13.064054
|View full text |Cite
|
Sign up to set email alerts
|

Space-Charge-Limited Photocurrents and Transient Currents in (Cd,Zn)Te Radiation Detectors

Abstract: We combined steady-state photoconductivity and laser-induced transient current measurements under above-band-gap illumination to study the space charge formation in CdZnTe. Analytical as well as numerical models describing space charge limited photocurrents were developed and an excellent agreement with measured data was obtained especially with the Drift-diffusion model. Linear rise of photocurrent at low bias was observed and ascribed to the trapping of injected holes at the region close to the cathode side.… Show more

Help me understand this report
View preprint versions

Search citation statements

Order By: Relevance

Paper Sections

Select...
4
1

Citation Types

0
17
0

Year Published

2021
2021
2024
2024

Publication Types

Select...
6

Relationship

1
5

Authors

Journals

citations
Cited by 11 publications
(17 citation statements)
references
References 47 publications
0
17
0
Order By: Relevance
“…Moreover, the almost perfectly linear profiles of the electric field in Figure 2 sign the charging by carrier depletion. On the other hand, the carrier injection would produce curves deviating from linear profiles as predicted by the theory of the Space Charge Limited Currents [ 23 , 24 ]. Consequently, the blocking cathode may be considered as the primary attribute responsible for the positive space charge formation in the sample before annealing—step 0.…”
Section: Resultsmentioning
confidence: 99%
See 3 more Smart Citations
“…Moreover, the almost perfectly linear profiles of the electric field in Figure 2 sign the charging by carrier depletion. On the other hand, the carrier injection would produce curves deviating from linear profiles as predicted by the theory of the Space Charge Limited Currents [ 23 , 24 ]. Consequently, the blocking cathode may be considered as the primary attribute responsible for the positive space charge formation in the sample before annealing—step 0.…”
Section: Resultsmentioning
confidence: 99%
“…We tested the validity of the presented physical model by numerical simulation illustrating the oscillatory character of the charge and resistance shown in Figure 2 b,d and Figure 3 c, respectively. The calculations were done with the homemade code [ 23 , 25 ] solving the drift-diffusion and Poisson’s equations. We defined the defect structure of the bulk by trial parameters: Fermi energy eV, one electron trap with the density cm localized below at the energy eV, and one hole trap above with the density cm at the energy eV.…”
Section: Resultsmentioning
confidence: 99%
See 2 more Smart Citations
“…[10,11] To study the photocurrent-voltage characteristics of perovskites, it is necessary to gradually increase the bias voltage for a given light illumination with the aim of saturating the photocurrent. [12,13] This requires the material to exhibit excellent stability under high bias conditions.…”
Section: Introductionmentioning
confidence: 99%