Preparation of Long Fiber-Shaped Zinc Oxide Based Composite Photoelectrode by Continuous Electrodeposition
纤维结构电子器件近年来备受关注，但作为其核心部件的纤维结构光电极尚未实现批量化制造。尤其是，在沿长尺寸纤维电极组装纳米结构ZnO等常用半导体氧化物的过程中，往往面临前体溶胶长时间稳定保存与局部凝胶快速可控沉积的矛盾。因此提出了一种适合在长纤维基底上连续可控沉积纳米ZnO的电沉积方法。研究设计了能沿长纤维移动的微型连续流反应槽，并通过电泳作用强化胶团迁移，触发溶胶在纤维电极局部的快速凝胶化。最终，在长度超过米级的镀金属高分子纤维上，均匀包覆ZnO纳米薄层，并进一步在薄层上生长了多孔及纳米棒阵列结构的ZnO层，进而开发了一类纤维结构ZnO基光电极材料。该材料被成功应用于纤维太阳能电池，其中最佳的器件达到了0.446 V的开路电压、3.77 mA·cm-2的短路电流密度和0.41的填充因子。相关方法为突破多种纤维结构氧化物半导体电极的批量化制备瓶颈，实现大面积织物电子器件及智能纺织品加工提供了重要思路。
Fiber-structured electronic devices were attractive subjects in recent years, but fiber-structured photoelectrode, as their core component, has not been mass-manufactured. Particularly, there is always a contradiction between long-term stable preservation of precursor sol and rapidly controllable deposition of local gel in the process of assembling common semiconductor oxides such as ZnO nanostructured along long-size fiber electrodes. Therefore, an electrodeposition method was developed, which is suitable for continuous and controllable deposition of nano ZnO on long fiber-shaped substrate. A miniature continuous flow reactor capable of moving along long fibers was designed, meanwhile, the micelle migration was enhanced by electrophoresis, so as to trigger the rapid gelation of the sol on local fiber electrode. Finally, the nano ZnO thin layer was uniformly coated on the metal-plated polymer fiber with more than 1 m in length. Besides, the ZnO layer with porous structure and nanorod array structure were further grown. Thus, a series of fiber structure ZnO-based photoelectrode materials were developed. It has been successfully applied to fiber solar cells, and the best device has achieved an open circuit voltage of 0.446 V, a short circuit current density of 3.77 mA·cm-2, and a fill factor of 0.41. The proposed method provides an important idea for breaking through the bottleneck of mass production of various fiber-structured oxide semiconductor electrodes and realizing scalable processing of fabric electronic devices and intelligent textile.
秦龙, 王韵词, 项思维. 连续电沉积法制备长纤维氧化锌基复合光电极[J]. 激光与光电子学进展, 2023, 60(13): 1316008. Long Qin, Yunci Wang, Siwei Xiang. Preparation of Long Fiber-Shaped Zinc Oxide Based Composite Photoelectrode by Continuous Electrodeposition[J]. Laser & Optoelectronics Progress, 2023, 60(13): 1316008.