Environmentally safe layered crystal produced from hazardous chemical elements: TlPb2BrI4, a new promising detector material

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NSTL

外文摘要：? 2022 Elsevier B.V.Exploring better Gamma, X-Ray and IR-Mid-R detectors, adequately sensitive to ambient temperatures and environmental conditions, is highly desirable. Therefore, following this path, we present detecting opportunities, based on data of experimental and theoretical investigation of the electronic and optical properties, photocurrent behavior at different bias voltages as well as the reflection for the He-Cd cw laser after irradiation by three different IR laser wavelengths, for recently grown TlPb2BrI4 single crystal with strong anisotropic, two-dimensional (2D) layered structure. The X-ray photoelectron spectroscopy brings data on binding energy values of core levels of TlPb2BrI4 for both as-grown and Ar+-ion-treated crystal surfaces as well as for elucidation of the energy distribution of the valence electronic states. In opposite to well-known IR-detector materials, TlPb2BrI4 crystal surface shows high chemical stability concerning Ar+-ion bombardment. Further, we carry out ab initio band-structure calculations to gain curves of total and partial densities of states and to elucidate the principal optical constants of TlPb2BrI4. The present studies indicate that, in spite of the fact that the TlPb2BrI4 crystal contains two very hazardous/toxic chemical elements, thallium and lead; however, it is chemically stable and reveals very low hygroscopic behavior when being exposed to environmental conditions.

外文关键词：

Electronic structureFirst-principal computationLeadHazardous elementsThalliumXPS

作者：

Khyzhun O.Y.、Vu T.V.、Parasyuk O.V.、Fedorchuk A.O.、Fochuk P.M.、Lavrentyev A.A.、Gabrelian B.V.、Levchuk I.、Matt G.J.、Shrestha S.、Brabec C.J.、Tedde S.F.、Schmidt O.、Kityk I.V.、Piasecki M.

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作者单位：

Frantsevych Institute for Problems of Materials Science National Academy of Sciences of Ukraine

Faculty of Mechanical - Electrical and Computer Engineering School of Engineering and Technology Van Lang University

Department of Inorganic and Physical Chemistry Lesya Ukrainka Volyn National University

Department of Inorganic and Organic Chemistry Lviv National University of Veterinary Medicine and Biotechnologies

Yuriy Fed'kovych Chernivtsi National University

Department of Electrical Engineering and Electronics Don State Technical University

Department of Computational Technique and Automated System Software Don State Technical University

Friedrich-Alexander-Universit?t Erlangen-Nürnberg Materials for Electronics and Energy Technology (i-MEET) Martensstrasse 7

Siemens Healthineers Technology Center

Electrical Engineering Department Czestochowa University Technology

Departmentof Experimental Physics and Information-measuring Technology Lesya Ukrainka Volyn National University

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出版年：

2022

DOI：

10.1016/j.jallcom.2022.166558

Journal of Alloys and Compounds

EISCI

ISSN：0925-8388

年,卷(期)：2022.924