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Microstructural, optical and electrical properties of Cl-doped CdTe single crystals

Hyojeong Choi

Hyojeong Choi

WCU Department of Energy Science, Sungkyunkwan UniversitySuwon, Korea (Republic of)
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Choi, Hyojeong
, 
Han Soo Kim

Han Soo Kim

Korea Atomic Energy Research InstituteJeongeup, Korea (Republic of)
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Kim, Han Soo
, 
Joon-Ho Oh

Joon-Ho Oh

Korea Atomic Energy Research InstituteJeongeup, Korea (Republic of)
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Oh, Joon-Ho
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Dong Jin Kim

Dong Jin Kim

Korea Atomic Energy Research InstituteJeongeup, Korea (Republic of)
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Kim, Dong Jin
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Young Soo Kim

Young Soo Kim

Korea Atomic Energy Research InstituteJeongeup, Korea (Republic of)
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Kim, Young Soo
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Jong-Seo Chai

Jong-Seo Chai

College of Information and Communication Engineering, Sungkyunkwan UniversitySuwon, Korea (Republic of)
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Chai, Jong-Seo
 y 
Jang Ho Ha

Jang Ho Ha

Korea Atomic Energy Research InstituteJeongeup, Korea (Republic of)
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Ha, Jang Ho
  
08 sept 2016
Microstructural, optical and electrical properties of Cl-doped CdTe single crystals's Cover Image
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Categoría del artículo: Research Article
Publicado en línea: 08 sept 2016
Páginas: 487 - 493
Recibido: 17 jun 2015
Aceptado: 17 may 2016
DOI: https://doi.org/10.1515/msp-2016-0066
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© 2016 Hyojeong Choi et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fig. 1

Four CdTe ingots used in this study: un-doped, doped with Cl at concentrations of 4.97 × 1019 cm−3, 9.94 × 1019 cm−3 and 1.99 × 1020 cm−3.
Four CdTe ingots used in this study: un-doped, doped with Cl at concentrations of 4.97 × 1019 cm−3, 9.94 × 1019 cm−3 and 1.99 × 1020 cm−3.

Fig. 2

XRD measurement results of 12 samples from four ingots with different Cl doping concentrations, chosen from top, middle and bottom sections, respectively.
XRD measurement results of 12 samples from four ingots with different Cl doping concentrations, chosen from top, middle and bottom sections, respectively.

Fig. 3

Typical IR microscope images of Te inclusions for three samples with Cl doping concentrations of 4.97 × 1019 cm−3, 9.94 × 1019 cm−3 and 1.99 × 1020 cm−3. The solid lines appearing on the surfaces might be due to the scratches induced by incompletely optimized polishing processes.
Typical IR microscope images of Te inclusions for three samples with Cl doping concentrations of 4.97 × 1019 cm−3, 9.94 × 1019 cm−3 and 1.99 × 1020 cm−3. The solid lines appearing on the surfaces might be due to the scratches induced by incompletely optimized polishing processes.

Fig. 4

Histogram of Te inclusions size distribution for three Cl-doped CdTe samples.
Histogram of Te inclusions size distribution for three Cl-doped CdTe samples.

Fig. 5

(a) Dielectric response curves of undoped and doped (1.99 × 1020 cm−3) CdTe sample, (b) α2vs. photon energy (hν, in eV) with extrapolation of the linear part of the curves to α = 0, (c) second derivative plots of ε1 shown in Fig. 5a.
(a) Dielectric response curves of undoped and doped (1.99 × 1020 cm−3) CdTe sample, (b) α2vs. photon energy (hν, in eV) with extrapolation of the linear part of the curves to α = 0, (c) second derivative plots of ε1 shown in Fig. 5a.

Fig. 6

(a) Average resistivities of CdTe samples as a function of Cl doping concentrations. Solid fitting line was provided as a guide for the eyes; (b) average resistivities of CdTe samples from different locations within the ingots (Fig. 1). Solid fitting line was provided as a guide for the eyes.
(a) Average resistivities of CdTe samples as a function of Cl doping concentrations. Solid fitting line was provided as a guide for the eyes; (b) average resistivities of CdTe samples from different locations within the ingots (Fig. 1). Solid fitting line was provided as a guide for the eyes.

Average resistivities of the CdTe samples with different Cl doping concentrations and different positions within the ingots_ Mean values for each row/column were also calculated and presented in the Table_

Top [Ω·cm]Middle [Ω·cm]Bottom [Ω·cm]Mean [Ω·cm]
Undoped5.20 × 1041.33 × 1041.60 × 1042.71 × 104
Cl doped, 4.97 × 1019cm−33.56 × 1065.70 × 1092.07 × 1092.59 × 109
Cl doped, 9.94 × 1019cm−31.06 × 1098.03 × 1093.35 × 1094.15 × 109
Cl doped, 1.99 × 1020cm−32.19 × 1091.44 × 10102.11 × 1096.22 × 109
Mean [Ω·cm]8.15 × 1087.02 × 1091.88 × 109
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Ciencia de los materiales, Ciencia de los materiales, otros, Nanomateriales, Materiales funcionales e inteligentes, Características y propiedades de los materiales
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