Ta Thi Thu, Nguyen Huu Tuan, Thiet Duong Van, Nguyen Thi Huong, Pham Anh Tuan Thanh, Phan Bach Thang, Cho Sunglae, Duong Anh Tuan
Faculty of Materials science and Engineering, Phenikaa University Yen Nghia Ha-Dong District Hanoi 12116 Vietnam
Faculty of Electrical and Electronic Engineering, Phenikaa University Yen Nghia Ha-Dong District Hanoi 12116 Vietnam.
RSC Adv. 2025 Jul 21;15(32):25823-25830. doi: 10.1039/d5ra03099d.
In this study, we demonstrate that co-doping Sb and Cu into n-type PbTe significantly enhances its thermoelectric performance by increasing electrical conductivity and reducing thermal conductivity at high temperatures. A series of Pb (SbCu) Te ( = 0-0.006) samples were synthesized using a solid-state reaction method. The results show that the values at 673 K range from 0.93 to 1.3, depending on the doping concentration. The maximum value of 1.3 at 673 K was achieved for the sample with an optimal doping level of = 0.005, attributed to the synergistic effects of Sb and Cu on carrier concentration optimization and enhanced phonon scattering. These findings provide a cost-effective and scalable approach to improving the thermoelectric efficiency of n-type PbTe, making it a promising candidate for mid-temperature thermoelectric applications.
在本研究中，我们证明将锑（Sb）和铜（Cu）共掺杂到n型碲化铅（PbTe）中，通过在高温下提高电导率和降低热导率，显著增强了其热电性能。采用固态反应法合成了一系列Pb(SbCu)Te（ = 0 - 0.006）样品。结果表明，在673 K时， 值在0.93至1.3之间，具体取决于掺杂浓度。对于掺杂水平 = 0.005的最佳样品，在673 K时实现了1.3的最大值，这归因于Sb和Cu对载流子浓度优化和增强声子散射的协同效应。这些发现为提高n型PbTe的热电效率提供了一种经济高效且可扩展的方法，使其成为中温热电应用的有前途的候选材料。
