Jen I-Lun, Lin Chia-Shien, Wang Kuang-Kuo, Wu Hsin-Jay
Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan.
Department of Materials and Optoelectronic Science, National Sun Yat-sen University, Kaohsiung 80424, Taiwan.
ACS Appl Mater Interfaces. 2023 Nov 8;15(44):51110-51116. doi: 10.1021/acsami.3c10967. Epub 2023 Oct 30.
Zinc antimonides, particularly the β-ZnSb compound, act as prototypes in the early phases of thermoelectric generator (TEG) development. However, their potential applications are constrained by structural instability at elevated temperatures. In this study, introducing a low concentration of aluminum (Al) achieves a highly stable Al-ZnSb, exhibiting an improved peak value compared to undoped ZnSb. Notably, a single-leg device utilizing a fully dense AlZnSb demonstrates an impressive conversion efficiency (η) of 3% even at a temperature difference (Δ) of 225 K. This result represents an approximately 200% increase compared with the pristine one. The combination of dilute cationic doping and phase diagram engineering solidifies the potential of ZnSb as an efficient and sustainable green energy device.
锑化锌，尤其是β-ZnSb化合物，在热电发电机（TEG）发展的早期阶段作为原型材料。然而，它们的潜在应用受到高温下结构不稳定性的限制。在本研究中，引入低浓度的铝（Al）可实现高度稳定的Al-ZnSb，与未掺杂的ZnSb相比，其峰值有所提高。值得注意的是，一个使用完全致密的AlZnSb的单腿器件即使在225 K的温差（Δ）下也展现出令人印象深刻的3%的转换效率（η）。与原始器件相比，这一结果代表了约200%的增长。稀阳离子掺杂和相图工程的结合巩固了ZnSb作为一种高效且可持续的绿色能源器件的潜力。
