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Пластичные полупроводниковые твердые растворы Ag2S-Ag2Se
- Authors: Тверьянович Ю.С.1, Смирнов Е.В.1, Тверьянович А.С.1, Глумов О.В.1, Толочко О.В.2, Касаткин И.А.1, Томаев В.В.1,3, Абрамович А.А.1
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Affiliations:
- Институт химии Санкт-Петербургского государственного университета
- Санкт-Петербургский политехнический университет
- Санкт-Петербургский технологический институт
- Issue: Vol 50, No 5 (2024)
- Pages: 453-463
- Section: Articles
- URL: https://rjonco.com/0132-6651/article/view/679500
- DOI: https://doi.org/10.31857/S0132665124050085
- EDN: https://elibrary.ru/NSKSIN
- ID: 679500
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Fig. 1. Samples of solid solutions in the form of a cylinder obtained by pressing (a), as well as in the form of foil (b) and wire (c), obtained by cold rolling.
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Fig. 2. a – Red circles and squares – concentration dependence of microhardness for two regions of solid solutions (our data). Dashed black lines – mixing energy for solid solutions (I) and (II) at 298 K [5]. The shaded area separates solid solutions based on Ag2S and solid solutions based on Ag2Se. b – Concentration dependence of the unit cell volume for two regions of solid solutions [6]. c – Concentration dependence of Milman plasticity (our data).
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Fig. 3. Survey spectrum of optical absorption in the IR range. 1 – 0.2 Ag2Se, 2 – 0.1 Ag2Se, 3 – 0 Ag2Se. The inset shows the concentration dependence of the optical band gap.
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Fig. 4. a – Concentration dependence of the Seebeck constant. The asterisk marks the result obtained by measuring the thermoelectric power of thermocouples twisted from the wire of the semiconductor under study and the wires of reference metals. b – Temperature dependences of the specific conductivity of bulk samples (light squares and circles) and film samples obtained from them by rolling (dark circles and squares). The composition of the samples and the activation energies of conductivity are shown in the figure.
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Fig. 5. Comparison of diffraction patterns of the original Ag2S ingot (bottom) and foil obtained from it by cold rolling (top).
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