Sun Min, Liu Yu, Chen Dongdan, Qian Qi
State Key Laboratory of Luminescent Materials and Devices, Institute of Optical Communication Materials, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, and Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China.
Nanomaterials (Basel). 2023 Feb 19;13(4):773. doi: 10.3390/nano13040773.
Cu-Se alloy core fibers with glass cladding were fabricated by a thermal drawing method of a reactive molten core. The composition, crystallography, and photoelectric/thermoelectric performance of the fiber cores were investigated. The X-ray diffraction spectra of the Cu-Se alloy core fibers illustrate the fiber cores being polycrystalline with CuSe and CuSe phases. Interestingly, the fiber cores show a lower electrical conductivity under laser irradiation than under darkness at room temperature. Meanwhile, the fiber cores possess a power factor of ~1.2 mWmK at room temperature, which is approaching the value of the high thermoelectric performance bulk of CuSe polycrystals. The flexible Cu-Se fibers and their micro-nano tapers have potential multifunctional applications in the field of photoelectric detection and thermoelectric conversion on curved surfaces.
通过反应性熔芯热拉法制备了具有玻璃包层的铜硒合金芯光纤。对光纤芯的成分、晶体结构以及光电/热电性能进行了研究。铜硒合金芯光纤的X射线衍射光谱表明，光纤芯为具有CuSe和Cu₂Se相的多晶体。有趣的是，在室温下，光纤芯在激光照射下的电导率低于黑暗环境中的电导率。同时，光纤芯在室温下的功率因数约为1.2 mWm⁻²K⁻²，接近高热电性能的块状Cu₂Se多晶体的值。柔性铜硒光纤及其微纳锥在曲面光电检测和热电转换领域具有潜在的多功能应用。
