Tan Ming, Shi Xiao-Lei, Liu Wei-Di, Jiang Yong, Liu Si-Qi, Cao Tianyi, Chen Wenyi, Li Meng, Lin Tong, Deng Yuan, Liu Shaomin, Chen Zhi-Gang
School of Textile Science and Engineering, Tiangong University, Tianjin, China.
School of Chemistry and Physics, ARC Research Hub in Zero-emission Power Generation for Carbon Neutrality, and Centre for Materials Science, Queensland University of Technology, Brisbane, QLD, Australia.
Nat Commun. 2025 Jan 14;16(1):633. doi: 10.1038/s41467-025-56015-5.
Here, we design exotic interfaces within a flexible thermoelectric device, incorporating a polyimide substrate, Ti contact layer, Cu electrode, Ti barrier layer, and thermoelectric thin film. The device features 162 pairs of thin-film legs with high room-temperature performance, using p-BiSbTe and n-BiTeSe, with figure-of-merit values of 1.39 and 1.44, respectively. The 10 nm Ti contact layer creates a strong bond between the substrate and the Cu electrode, while the 10 nm Ti barrier layer significantly reduces internal resistance and enhances the tightness between thermoelectric thin films and Cu electrodes. This enables both exceptional flexibility and an impressive power density of 108 μW cm under a temperature difference of just 5 K, with a normalized power density exceeding 4 μW cm K. When attached to a 50 °C irregular heat source, three series-connected devices generate 1.85 V, powering a light-emitting diode without the need for an additional heat sink or booster.
在此，我们在一种柔性热电装置中设计了特殊界面，该装置包含聚酰亚胺衬底、钛接触层、铜电极、钛阻挡层和热电薄膜。该装置具有162对具有高室温性能的薄膜腿，使用p型BiSbTe和n型BiTeSe，其优值分别为1.39和1.44。10纳米的钛接触层在衬底和铜电极之间形成了牢固的结合，而10纳米的钛阻挡层显著降低了内阻，并增强了热电薄膜与铜电极之间的紧密性。这使得该装置既具有出色的柔韧性，又在仅5K的温差下具有令人印象深刻的108微瓦每平方厘米的功率密度，归一化功率密度超过4微瓦每平方厘米开尔文。当连接到50°C的不规则热源时，三个串联的装置产生1.85伏电压，可为发光二极管供电，无需额外的散热器或升压器。
