Structural stability enables high thermoelectric performance in room temperature Ag₂Se

Abstract

<p>The thermoelectric performance of room temperature Ag₂Se was greatly enhanced by stabilizing the crystal structure and eliminating metastability.</p>

Microstructurally Tailored Thin β‐Ag2Se Films toward Commercial Flexible Thermoelectrics

“…[16] Although both zT and PF of Ag 2 Se have reached relatively higher values of ≈1.2 and ≈2440 µW m −1 K −2 , [16] respectively, which is comparable to that of commercialized Bi 2 Te 3 TE materials, [17] there are almost no reports for practical applications. In addition, most of the previous reported selenization strategies for Ag 2 Se films fabrication inevitably require relatively high temperatures (>130 °C, the α to β phase transformation temperature), high pressure, or vacuum conditions, [16,[18][19][20] and further simplifying the processing strategies to practical steps over the last industrial/commercial threshold of flexible TEGs seems to be more urgent.…”

Ultra-low thermal conductivity in B2O3 composited SiGe bulk with enhanced thermoelectric performance at medium temperature region

“…Looking at other medium temperature region TE materials, such as sulde-based (SnSe, SnSe 2 , Ag 2 Se, Ag 8 SnSe 6 ), Te-based and skutteridite ones, [32][33][34][35][36] the signicant advances of SiGe materials could be exemplied by their high stability, super safety, environmentally friendly elements, ease of realizing industrial manufacturing, among other properties. Although the TE performance is not superior to the highest sulde-based ones, it shows enough advances and application importance in the medium temperature region.…”

Liquid-Phase Manipulation Securing Enhanced Thermoelectric Performance of Ag2Se

“…β-Ag 2 Se is a good n-type TE material near room temperature owing to its high ZT, low toxicity, and naturally abundant constituent elements. − Benefiting from its narrow band gap, the optimized power factor can reach 3.5 × 10 –3 Wcm –1 K –2 , which is comparable to that of the well-known room-temperature n-type Bi 2 Te 3 -based alloys. ZT values for β-Ag 2 Se have been reported to be lower than 1.0 at room temperature earlier. , Recently, a high ZT of 1.2 for Ag 2 Se films has been obtained .…”