Volume 21, Issue 24 2570184
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Modulating Solid-Solution Solubility to Enhance Thermoelectric Performance and Maintain Structural Stability in Phase-Transition Silver Chalcogenides (Small 24/2025)

Yun-Han Huang Lu

Yun-Han Huang Lu

Department of Materials Science and Engineering, National Yang-Ming Chiao Tung University, Hsinchu, 30010 Taiwan

Department of Materials Science and Engineering, National Taiwan University, Taipei, 10617 Taiwan

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I-Lun Jen

I-Lun Jen

Department of Materials Science and Engineering, National Yang-Ming Chiao Tung University, Hsinchu, 30010 Taiwan

Department of Materials Science and Engineering, National Taiwan University, Taipei, 10617 Taiwan

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Ching-Yu Chiang

Ching-Yu Chiang

Scientific Research Division, National Synchrotron Radiation Research Center, Hsinchu, 30076 Taiwan

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Wan-Zhen Hsieh

Wan-Zhen Hsieh

Scientific Research Division, National Synchrotron Radiation Research Center, Hsinchu, 30076 Taiwan

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Gung-Chian Yin

Gung-Chian Yin

Experimental Facility Division, National Synchrotron Radiation Research Center, Hsinchu, 30076 Taiwan

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Yen-Fang Song

Yen-Fang Song

Experimental Facility Division, National Synchrotron Radiation Research Center, Hsinchu, 30076 Taiwan

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Hsin-Jay Wu

Hsin-Jay Wu

Department of Materials Science and Engineering, National Yang-Ming Chiao Tung University, Hsinchu, 30010 Taiwan

Department of Materials Science and Engineering, National Taiwan University, Taipei, 10617 Taiwan

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First published: 19 June 2025

Graphical Abstract

Silver Chalcogenides

In article number 2410583, Hsin-Jay Wu and co-workers uncover the mechanism of silver whisker growth and propose a method to inhibit it. By modulating the solubility of the silver solid solution through dilute Ga doping, the Ga-Ag2+xTe achieves improved thermoelectric performance, reaching a conversion efficiency of 2.3% with a ΔT of 300 K, and remains free of whiskers after high-temperature testing, resulting in a thermally stable, high-performance thermoelectric device.

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