Chalcogenide glass for thermoelectric application

Native Crystal Growth Revealed by a Joint Microscopy–Calorimetry Technique in (GeS2)0.1(Sb2S3)0.9 Thin Amorphous Films: A Critical Role of Internal Stress and Mechanical Defects

“…The first reason is to determine the preparation and/or processing conditions for the chalcogenide glass under which the formation of the crystalline phase can yet be safely avoided. This knowledge is of high importance for a majority of relevant applications of chalcogenide glasses, − where the presence of crystallites in the glassy matrix markedly affects their optical transmission and reflectivity (influencing both the dispersion and absorption characteristics), linear and nonlinear refractive index, optical losses and band gap, photoinduced anisotropy, thermal and electrical (even ionic with doping) (semi)-conductivity, or thermoelectric properties. Note that chalcogenides are often used as optical elements (prisms, gratings, lenses, monochromators, or laser-tuned devices), (photoinduced) waveguides and optical fibers, optical amplifiers and lasers, photonic switches, thermal and hyperspectral imaging devices, temperature monitors, and chemical sensors in the infrared spectral region (due to their high transparency above ∼1 μm).…”

Ultraflexible Temperature‐Strain Dual‐Sensor Based on Chalcogenide Glass‐Polymer Film for Human‐Machine Interaction

“…Semiconducting chalcogenide glasses (ChGs), especially tellurium-based ChGs, are emerging TE materials due to their advantageous combination of low thermal conductivity, high intrinsic Seebeck coefficient and tunable electrical conductivity. [25,26] Inspired by their superior properties, the thermal-sensing performance of Cu-Ge-Te, Cu-As-Se-Te, Ag-Ga 2 Te 3 -SnTe, and Ge-Se-Te systems has been investigated. [27][28][29][30] However, current research on ChGs is restricted by their bulk form, which makes them cumbersome and unsuitable for wearable devices.…”

High Seebeck Coefficient Inorganic Ge15Ga10Te75 Core/Polymer Cladding Fibers for Respiration and Body Temperature Monitoring

“…Thus, TE material with a large Seebeck coefficient is preferred for thermal sensing that requires high sensitivity and accurate temperature-sensing ability. , Recent decades have witnessed great efforts in developing novel TE materials including organic and inorganic materials to realize highly sensitive thermal sensing. − The organic TE materials exhibit unique flexibility and ease of processing. This low Seebeck coefficient limits its potential application in high-performance thermal sensors. − Due to the relatively high carrier concentration, inorganic crystalline TE materials usually show a low Seebeck coefficient and high electrical conductivity, which is not suitable for thermal sensing. − In contrast, inorganic amorphous TE materials possess low thermal conductivity and high Seebeck coefficient in spite of a low ZT, which are promising candidates for thermal sensors with high sensitivity and temperature resolution. , The recently reported semiconducting chalcogenide glasses of Cu–As–Se–Te, As–Se–Sb–Cu, and Ge–Se–Sb–Ag systems present a high Seebeck coefficient of above 1000 μV/K, − while the low anticrystallization ability of these materials leads to uncontrolled crystallization during fiber drawing, which results in the decrease of the Seebeck coefficient . Research and development of novel inorganic amorphous TE materials with both large Seebeck coefficient and superior anticrystallization ability are urgently needed.…”