Wei Kun, Li Baoping, Gong Chengshi, Zhu Ziran, Zhang Yu, Liu Menghan, Ren Peiling, Pan Xiaojun, Wang Youqing, Zhou Jinyuan
Research Center for Semiconductor Materials and Devices, Shaanxi University of Science and Technology, Xi'an 710021, People's Republic of China.
School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, People's Republic of China.
Nanotechnology. 2021 Aug 31;32(47). doi: 10.1088/1361-6528/ac1b57.
In order to solve the 'ultraviolet (UV) filtering problem' caused by traditional sandwich-type structure in photoelectrochemical (PEC) UV detector, we design a special electrode based on stainless steel mesh, which integrates the light absorption layer and the electron collection electrode in a simple way. In combination with an UV-transparent quartz substrate, UV light can directly reach the active material. The improved detector shows good visible-blind, self-powered, and linear response characteristics. The serious recombination caused by metal electrode is suppressed by depositing a barrier layer. The optimized device exhibits a high photoresponse of 0.103 A Wat 296 nm, a short recovery time of 250 ms, and very sensitive switching ability. Furthermore, the response range of the detector is expanded from 300 to 400 nm to the full near-UV region. Our work provides an efficient strategy to solve the key problem of the PEC UV detector.
为了解决光电化学（PEC）紫外探测器中传统三明治结构所导致的“紫外（UV）过滤问题”，我们基于不锈钢网设计了一种特殊电极，该电极以简单的方式集成了光吸收层和电子收集电极。结合紫外透明石英基板，紫外光能够直接到达活性材料。改进后的探测器展现出良好的日盲、自供电和线性响应特性。通过沉积阻挡层抑制了由金属电极引起的严重复合。优化后的器件在296nm处具有0.103A的高光响应、250ms的短恢复时间以及非常灵敏的开关能力。此外，探测器的响应范围从300至400nm扩展到了整个近紫外区域。我们的工作为解决PEC紫外探测器的关键问题提供了一种有效策略。
