TY - JOUR

T1 - Synthesis and study of single crystals and optical ceramics based on the AgCl0.25Br0.75 – AgI system

AU - Salimgareev, Dmitrii

AU - Lvov, Alexander

AU - Yuzhakova, Anastasia

AU - Shatunova, Darya

AU - Pestereva, Polina

AU - Yuzhakov, Ivan

AU - Korsakov, Alexander

AU - Zhukova, Liya

N1 - The research funding from the Ministry of Science and Higher Education of the Russian Federation (Ural Federal University Program of Development within the Priority-2030 Program) is gratefully acknowledged.

PY - 2023/6/1

Y1 - 2023/6/1

N2 - To obtain non-toxic, non-hygroscopic materials used in IR fiber optics and optoelectronics, a comprehensive study of the AgCl0.25Br0.75 – AgI system was carried out. The study of the AgCl0.25Br0.75 – AgI system's phase diagram showed the presence of a homogeneity region with a content 0–16 mol.% AgI in AgCl0.25Br0.75 and heterogeneity region 16–98 mol.% AgI in AgCl0.25Br0.75. The phases in the homogeneous region have a cubic structure of the Fm3m type. The phases in the heterogeneous region are a mixture of cubic Fm3m and hexagonal P63mc phases. Within each of the regions, single-crystals samples with compositions of 4, 8, 16, and 20 mol.% AgI in AgCl0.25Br0.75 and optical ceramics ones of composition 20 and 33 mol.% AgI in AgCl0.25Br0.75 were synthesized. For a sample of 20 mol.% AgI in AgCl0.25Br0.75, different synthesis modes were used, as a result it was possible to obtain both a single-crystal and ceramics. The materials' band gap and the optical transmission range are determined. The band gap decreases from 2.5195 to 2.3724 with a rise in the fraction of AgI in AgCl0.25Br0.75. The materials are transparent in the range of 0.492 - 54 μm. Single-crystals are characterized by a stepwise increase in transmission up to 50–57% at the short-wavelength absorption edge. For optical ceramics, the transmission initially reaches 1% stepwise and then increases until reaching a maximum value in the IR of 15–20 μm. It is associated with scattering by grains of different phases. A uniform shift of the transmission spectrum to longer wavelengths from 492 to 525 nm in the visible and from 47 to 54 μm in the far IR with a rise in the proportion of AgI in AgCl0.25Br0.75 is shown. The single-crystals' and optical ceramics' highest transmission level reaches 75–78% in the wavelength range from 10 to 40 µm.

AB - To obtain non-toxic, non-hygroscopic materials used in IR fiber optics and optoelectronics, a comprehensive study of the AgCl0.25Br0.75 – AgI system was carried out. The study of the AgCl0.25Br0.75 – AgI system's phase diagram showed the presence of a homogeneity region with a content 0–16 mol.% AgI in AgCl0.25Br0.75 and heterogeneity region 16–98 mol.% AgI in AgCl0.25Br0.75. The phases in the homogeneous region have a cubic structure of the Fm3m type. The phases in the heterogeneous region are a mixture of cubic Fm3m and hexagonal P63mc phases. Within each of the regions, single-crystals samples with compositions of 4, 8, 16, and 20 mol.% AgI in AgCl0.25Br0.75 and optical ceramics ones of composition 20 and 33 mol.% AgI in AgCl0.25Br0.75 were synthesized. For a sample of 20 mol.% AgI in AgCl0.25Br0.75, different synthesis modes were used, as a result it was possible to obtain both a single-crystal and ceramics. The materials' band gap and the optical transmission range are determined. The band gap decreases from 2.5195 to 2.3724 with a rise in the fraction of AgI in AgCl0.25Br0.75. The materials are transparent in the range of 0.492 - 54 μm. Single-crystals are characterized by a stepwise increase in transmission up to 50–57% at the short-wavelength absorption edge. For optical ceramics, the transmission initially reaches 1% stepwise and then increases until reaching a maximum value in the IR of 15–20 μm. It is associated with scattering by grains of different phases. A uniform shift of the transmission spectrum to longer wavelengths from 492 to 525 nm in the visible and from 47 to 54 μm in the far IR with a rise in the proportion of AgI in AgCl0.25Br0.75 is shown. The single-crystals' and optical ceramics' highest transmission level reaches 75–78% in the wavelength range from 10 to 40 µm.

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UR - https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=tsmetrics&SrcApp=tsm_test&DestApp=WOS_CPL&DestLinkType=FullRecord&KeyUT=001055676100001

U2 - 10.1016/j.apmt.2023.101809

DO - 10.1016/j.apmt.2023.101809

M3 - Article

VL - 32

JO - Applied Materials Today

JF - Applied Materials Today

SN - 2352-9407

M1 - 101809

ER -