Wang Youqing, Zhang Miaomiao, Wu Wenxuan, Wang Ze, Liu Minghui, Yang Tiantian
Research Center for Semiconductor Materials and Devices, Shaanxi University of Science and Technology, Xi'an 710021, China.
School of Mechatronic Engineering, Xi'an Technological University, Xi'an 710021, China.
Nanomaterials (Basel). 2024 Feb 28;14(5):439. doi: 10.3390/nano14050439.
Conventional sandwich structure photoelectrochemical UV detectors cannot detect UV light below 300 nm due to UV filtering problems. In this work, we propose to place the electron collector inside the active material, thus avoiding the effect of electrodes on light absorption. We obtained a TiO-nanotubes@Ti@quartz photoanode structure by precise treatment of a commercial Ti mesh by anodic oxidation. The structure can absorb any light in the near-UV band and has superior stability to other metal electrodes. The final encapsulated photoelectrochemical UV detectors exhibit good switching characteristics with a response time below 100 ms. The mechanism of the oxidation conditions on the photovoltaic performance of the device was investigated by the electrochemical impedance method, and we obtained the optimal synthesis conditions. Response tests under continuous spectroscopy confirm that the response range of the device is extended from 300-400 nm to 240-400 nm. This idea of a built-in collector is an effective way to extend the response range of a photoelectrochemical detector.
传统的三明治结构光电化学紫外探测器由于紫外光过滤问题，无法检测波长低于300nm的紫外光。在这项工作中，我们建议将电子收集器置于活性材料内部，从而避免电极对光吸收的影响。我们通过阳极氧化对商用钛网进行精确处理，得到了TiO纳米管@Ti@石英光阳极结构。该结构能够吸收近紫外波段的任何光，并且相对于其他金属电极具有卓越的稳定性。最终封装的光电化学紫外探测器表现出良好的开关特性，响应时间低于100毫秒。通过电化学阻抗方法研究了氧化条件对器件光伏性能的影响机制，并获得了最佳合成条件。连续光谱下的响应测试证实，该器件的响应范围从300 - 400nm扩展到了240 - 400nm。这种内置收集器的想法是扩展光电化学探测器响应范围的有效方法。
