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Materials
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CdTe and Related Compounds: New Emerging Functionalities, Technologies and Applications
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CdTe and Related Compounds: New Emerging Functionalities, Technologies and Applications

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Optical and Photonic Materials".

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 6419

Special Issue Editor

Prof. Jan Franc

E-Mail Website
Guest Editor
Charles University, Prague Praha, Czech Republic
Interests: preparation of CdZnTe substrates and gamma ray detectors

Special Issue Information

Dear Colleagues,

CdTe and related compounds have so far achieved a number of various excellent commercial applications. Among them, cadmium telluride thin film solar cells are the leading industrial thin film solar cell technology, with recently achieved power conversion efficiency in excess of 22% at low costs per KWp. CdZnTe and CdTe bulk crystals are materials of choice for the detection of hard X-ray and gamma rays used in medical imaging, nonproliferation, radiation safety, materials diagnostics, and other fields. CdTe quantum dots are widely applied as biosensors.

Despite being an enormous commercial success, research on CdTe and related compounds properties is far from over, including materials, fabrication processes, and devices. Within this context, this Special Issue welcomes submissions on topics below:

  • Materials and fabrication processes—novel CdTe-based materials and hybrids, as 1D, 2D nanostructures, thin films, and bulk crystals, or organic/inorganic hybrid materials;
  • Physics of CdTe-based structures—focused on fundamental electrical, optical, and mechanical properties, 1D-3D defects, charge transport, contacts, and interfaces;
  • Devices and  device structures—device reliability, stability, modeling, and simulation;
  • Breakthroughs in fundamental physics—spin-polarized charge transport, CdTe/HgTe quantum wells as topological insulators, and other emerging topics.

Prof. Jan Franc
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • CdTe
  • photovoltaics
  • radiation detectors
  • biosensors
  • quantum structures
  • hybrid materials

Published Papers (3 papers)

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Research

7 pages, 1267 KiB  
Article
Investigation of Photoexcitation Energy Impact on Electron Mobility in Single Crystalline CdTe
by Viktor Djurberg, Saman Majdi, Nattakarn Suntornwipat and Jan Isberg
Materials 2021, 14(15), 4202; https://doi.org/10.3390/ma14154202 - 28 Jul 2021
Cited by 3 | Viewed by 1966
Abstract
The exceptional electronic properties of cadmium telluride (CdTe) allow the material to be used in a wide range of high energy radiation detection applications. Understanding the mechanisms of local carrier scattering is of fundamental importance to understand the charge transport in the material. [...] Read more.
The exceptional electronic properties of cadmium telluride (CdTe) allow the material to be used in a wide range of high energy radiation detection applications. Understanding the mechanisms of local carrier scattering is of fundamental importance to understand the charge transport in the material. Here, we investigate the effect of photoexcitation on electron transport properties in chlorine doped single crystalline cadmium telluride (SC-CdTe:Cl). For this purpose time of flight measurements were performed on SC-CdTe:Cl in order to study the electron drift mobility in the low injection regime. Measurements were made at the temperature intervals of 80 to 300 K, for an applied electric field between 270 and 1600 V/cm and for wavelengths of 532, 355 and 213 nm. We have found that the electron drift mobility was affected by the excitation energy for temperatures below 200 K. In addition, the measurements revealed that it is possible to determine impurity and shallow trap concentration by this method. The method proves to be extremely sensitive in measuring very low impurity levels and in identifying dominant scattering mechanisms. Full article
(This article belongs to the Special Issue CdTe and Related Compounds: New Emerging Functionalities, Technologies and Applications)
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8 pages, 1419 KiB  
Article
Spectral Dependence of the Photoplastic Effect in CdZnTe and CdZnTeSe
by Jan Franc, Václav Dědič, Pavel Moravec, Martin Rejhon, Roman Grill, Hassan Elhadidy, Vladimír Šíma, Miroslav Cieslar, Maroš Bratko, Utpal Roy and Ralph B. James
Materials 2021, 14(6), 1465; https://doi.org/10.3390/ma14061465 - 17 Mar 2021
Cited by 4 | Viewed by 1770
Abstract
We studied the spectral dependence of the Vickers microhardness HV0.025 of CdZnTe and CdZnTeSe samples upon illumination and found out that it increases over the entire applied spectral range of 1540–750 nm. We also found out that the photoconductivity and microhardness are correlated. [...] Read more.
We studied the spectral dependence of the Vickers microhardness HV0.025 of CdZnTe and CdZnTeSe samples upon illumination and found out that it increases over the entire applied spectral range of 1540–750 nm. We also found out that the photoconductivity and microhardness are correlated. We observed changes in the correlation diagram (change of slope and an abrupt change of HV0.025 at several wavelengths of the illuminating light). Based on measurements of the relative changes of the space charge upon illumination using the Pockels effect, we suggest that the observed spectral dependence of positive photoplastic effect in CdZnTe and CdZnTeSe can be explained by the trapping of photoinduced electrons and holes, which affects the motion of the partial dislocations. The underlying physical explanation relies on the assumption that reconstructed bonds break before dislocation glide. Full article
(This article belongs to the Special Issue CdTe and Related Compounds: New Emerging Functionalities, Technologies and Applications)
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11 pages, 1079 KiB  
Article
Polarization of Magnetoplasmons in Grating Metamaterials Based on CdTe/CdMgTe Quantum Wells
by Dmitriy Yavorskiy, Maria Szoła, Krzysztof Karpierz, Rafał Rudniewski, Rafał Bożek, Grzegorz Karczewski, Tomasz Wojtowicz, Jerzy Wróbel and Jerzy Łusakowski
Materials 2020, 13(8), 1811; https://doi.org/10.3390/ma13081811 - 11 Apr 2020
Cited by 4 | Viewed by 2098
Abstract
Grating metamaterials were fabricated with electron beam lithography on CdTe/CdMgTe modulation doped structures with two non-interacting quantum wells. Two types of samples were studied: with etched gratings and with gratings formed by deposition of Au stripes. The polarization properties at THz frequencies of [...] Read more.
Grating metamaterials were fabricated with electron beam lithography on CdTe/CdMgTe modulation doped structures with two non-interacting quantum wells. Two types of samples were studied: with etched gratings and with gratings formed by deposition of Au stripes. The polarization properties at THz frequencies of the gratings were determined at room temperature. It was shown that Au gratings formed a linear polarizer, while etched gratings did not polarize THz radiation. Transmission of circularly polarized THz radiation at low temperatures through a sample with no grating showed a strongly circularly polarized cyclotron resonance transition. Transmission of this radiation through a sample with an etched grating showed a magnetoplasmon transition that was almost perfectly linearly polarized. We concluded that magnetoplasmons in metamaterials with etched gratings are linearly polarized excitations, possibly with a small contribution of a circular component. This work opens the possibility of the detailed study of the polarization of magnetoplasmons, which has not been explored in the past. Full article
(This article belongs to the Special Issue CdTe and Related Compounds: New Emerging Functionalities, Technologies and Applications)
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