Wang Junhui, Zhang Mingcheng, Li Jiajia, Wu Changxuan, Cai Kefeng
Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, School of Materials Science and Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, China.
ACS Appl Mater Interfaces. 2025 Jul 9;17(27):39312-39318. doi: 10.1021/acsami.5c06377. Epub 2025 Jun 26.
CuSe has become a highly promising thermoelectric material owing to its abundant elemental reserves, nontoxicity, and low thermal conductivity. In this work, flexible CuSeI ( = 0, 0.02, 0.04, and 0.06) films were synthesized by a cost-effective and facile hydrothermal approach, followed by vacuum-assisted filtration and hot pressing, and the films were dense with well-crystallized CuSe grains. The introduction of iodine provides an additional electron, acting as N-type doping and reducing carrier concentration. With the increase of , the films exhibit a gradual reduction in electrical conductivity but a concurrent increase in the Seebeck coefficient. As a result, the CuSeI film with = 0.04 shows an optimal power factor of ∼566.9 μW m K along with remarkable flexibility at room temperature. In addition, the maximum output power of the six-leg flexible thermoelectric generator fabricated using the CuSeI film at a temperature difference of 22.8 K is 1.41 μW, with a power density of 4.02 W m. This work presents an effective strategy for developing high-performance flexible CuSe-based thermoelectric films.
由于硒化铜（CuSe）元素储量丰富、无毒且热导率低，它已成为一种极具潜力的热电材料。在这项工作中，通过一种经济高效且简便的水热法合成了柔性CuSeI（ = 0、0.02、0.04和0.06）薄膜，随后进行真空辅助过滤和热压，所得薄膜致密且具有结晶良好的CuSe晶粒。碘的引入提供了一个额外的电子，起到N型掺杂的作用并降低了载流子浓度。随着 的增加，薄膜的电导率逐渐降低，但塞贝克系数同时增加。因此， = 0.04的CuSeI薄膜在室温下表现出约566.9 μW m K的最佳功率因数以及显著的柔韧性。此外，使用CuSeI薄膜制作的六腿柔性热电发电机在22.8 K的温差下的最大输出功率为1.41 μW，功率密度为4.02 W m。这项工作为开发高性能柔性CuSe基热电薄膜提供了一种有效策略。
