Jeong, Myeong Hoon Park, Byoungwook Kim, Jungwon Han, Mijeong Kang, Young Hun 2026-02-19T01:00:12Z 2026-02-19T01:00:12Z 2026-01-26 2026-02 2522-0128 https://pubs.kist.re.kr/handle/201004/154265 Silver selenide (Ag2Se) is a promising n-type thermoelectric material because of its excellent thermoelectric performance near room temperature, but conventional methods for fabricating bulk Ag2Se require high temperatures and pressures making scalable production a challenge. Here, a facile and scalable strategy is presented for fabricating high-performance dense Ag2Se1.2 thermoelectric material by incorporating excess Se in solution-processed Ag2Se powders. The excess Se facilitates liquid-phase-assisted grain growth during annealing at 623 K under ambient pressure, which greatly improves microstructural properties such as the grain connectivity and bulk density. In experiments, Ag2Se1.2 exhibited a high-power factor and reduced lattice thermal conductivity leading to a maximum figure of merit of 0.927 at 393 K. The shape-conformable nature of Ag2Se1.2 also allows for the fabrication of cylindrical thermoelectric generators with a stable output voltage and power at various temperature differences. This strategy is a highly effective approach for improving not only the thermoelectric and mechanical performances of Ag2Se but also its applicability in curved or flexible energy harvesting devices. English SPRINGER NATURE Facile and scalable strategy for fabricating dense bulk Ag2Se as a high-performance thermoelectric material Article 10.1007/s42114-026-01621-0 1 Advanced Composites and Hybrid Materials, v.9, no.1 Advanced Composites and Hybrid Materials 9 1 N scie scopus 001686305700002 Nanoscience & Nanotechnology Materials Science, Composites Science & Technology - Other Topics Materials Science Article Thermal conductivity Dense bulk Conformable shape Silver selenide (Ag2Se) Thermoelectric