Self-powered UV detectors have attracted intensive research interest due to their advantages of low cost fabrication, high efficiency and low power consumption. In this paper, high ordered SnO₂-TiO₂ nanoheterostructure arrays were synthesized using soft chemical methods. A self-powered quasi-solid-state UV detector was constructed using this nanoheterostructure as the photoanode and a polyethylene oxide based quasi-solid-state electrolyte as the hole transfer layer. Because the SnO₂-TiO₂ core-shell nanoheterojunction simultaneously offers a high electron-hole separation, a low charge recombination and a direct pathway for electron transport, the nanostructured self-powered detector displayed an excellent performance over that based on bare TiO₂ nanostructure arrays. A quite high incident photon-to-current conversion efficiency of 55.8% at 340 nm and a fast response time (0.14 s for rise time and 0.06 s for decay time) were observed. That is quite excellent performance for self-powered UV detector. Moreover, the self-powered UV photodetector also shows an excellent spectral selectivity and long-time stability in the air. These excellent photoelectric characteristics will enable significant advancements for next-generation photodetecting applications.

自供电紫外线检测器由于其低成本制造，高效率和低功耗的优点而引起了广泛的研究兴趣。本文采用软化学方法合成了高阶SnO ₂ -TiO ₂纳米异质结构阵列。使用该纳米异质结构作为光阳极和基于聚环氧乙烷的准固态电解质作为空穴传输层，构建了自供电的准固态紫外线检测器。因为SnO ₂ -TiO ₂核-壳纳米异质结同时提供了高的电子-空穴分离，低的电荷复合和电子传输的直接路径，纳米结构的自供电探测器比基于裸露的TiO ₂纳米结构阵列的探测器表现出优异的性能。观察到在340 nm处有相当高的入射光子到电流转换效率，为55.8％，响应时间很快（上升时间为0.14 s，衰减时间为0.06 s）。对于自供电的紫外线检测器而言，这是相当出色的性能。此外，自供电的紫外线光电探测器还具有出色的光谱选择性和在空气中的长期稳定性。这些出色的光电特性将为下一代光电检测应用带来重大进步。