The main challenge of ZnO-based photodetectors is correlated with the difficulty of achieving both high photodetection performance and good environmental stability due to the deteriorated effect of photocorrosion under light illumination. Here, we presented the potential solution by applying Cu²⁺-doped ZnS as protective coatings on ZnO nanorods based on solution synthesis, where the systematic investigations on such core/shell nanostructures were performed by conducting crystallographic, morphological, compositional, photoluminescent, and light-absorption characterizations. In addition, the designed Cu²⁺-doped ZnS/ZnO-based photodetector demonstrated the substantial improvement of the specific detectivities reaching 99.3 × 10¹² and 127.2 × 10¹² cm Hz^1/2 W⁻¹ under the light illuminations of 365 nm and 420 nm, which were more than 22 times and 45 times beyond those of bare ZnO, respectively. It should be noted that the improved environmental stability for long-term utilization was revealed, where the photoresponsivity was sustained to be above 95.4% for lasting 60 days. Significantly, the present study provided a facile approach to advance the development of high-performance, broadband and reliable photodetector designs.

中文翻译：

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简便溶液处理法制备掺杂Cu（II）的ZnS / ZnO光电探测器的稳定性提高

ZnO基光电探测器的主要挑战与由于光照射下光腐蚀作用恶化而难以实现高光电探测性能和良好的环境稳定性有关。在这里，我们基于溶液合成方法，提出了通过将Cu ²⁺掺杂的ZnS用作ZnO纳米棒上的保护涂层的潜在解决方案，其中通过进行晶体学，形态学，组成，光致发光和光学等方法对此类核/壳纳米结构进行了系统研究。 -吸收特征。此外，设计的掺杂Cu ^2+的ZnS / ZnO基光电探测器显示出比探测率显着提高，分别达到99.3×10 ¹²和127.2×10 ¹²在365 nm和420 nm的光照下的cm Hz ^1/2 W ^-1分别是裸ZnO的22倍和45倍。应当指出的是，长期使用的环境稳定性得到了改善，其中光响应率持续60天保持在95.4％以上。重要的是，本研究提供了一种简便的方法来推进高性能，宽带和可靠的光电检测器设计的开发。