Effect of Synthesis Conditions on the Phase Composition and Structure of Cu_2 – δSrSnS₄ (0 < δ < 0.4) Quaternary Copper Compounds and Photogenerated Current Carrier Lifetimes in the Compounds

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发表日期：

2025年9月14日

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M. V. Gapanovich,
E. N. Koltsov,
E. V. Rabenok,
D. R. Kalimullina,
V. V. Rakitin,
D. S. Lutsenko,
B. I. Golovanov,
D. V. Korchagin,
G. V. Shilov,
D. M. Sedlovets

摘要

Abstract

Using the solid-state ampoule synthesis method, Cu_2 – δSrSnS₄ (0 ≤ δ ≤ 0.4) samples have been synthesized; the crystal lattice parameters of the samples have been refined, and the Raman spectra as a function of δ have been studied. It has been found that these compounds have a narrower single-phase region than that of Cu_2 – δBaSnS₄ compounds with a similar structure. In addition, the Cu_2 – δSrSnS₄ samples are unstable during vacuum annealing. Using microwave photoconductivity, it has been found that further annealing of Cu_2 – δSrSnS₄ in the presence of SnS₂ leads to a significant increase in the photogenerated current carrier lifetimes; this fact is apparently attributed to a decrease in the amount of impurity phases and structural defects formed due to thermal instability during synthesis.

Effect of Synthesis Conditions on the Phase Composition and Structure of Cu2 – δSrSnS4 (0 < δ < 0.4) Quaternary Copper Compounds and Photogenerated Current Carrier Lifetimes in the Compounds

摘要

Effect of Synthesis Conditions on the Phase Composition and Structure of Cu_2 – δSrSnS₄ (0 < δ < 0.4) Quaternary Copper Compounds and Photogenerated Current Carrier Lifetimes in the Compounds