Abstract We report the fabrication of a highly responsive ultrafast UV photodetector which utilizes combined photovoltaic and photo-induced pyroelectric effect or pyro-phototronic effect. The device architecture has a layered configuration where the photoactive layer is composed of gold nanoparticles (Au NPs) and zinc oxide (ZnO). Inclusion of sputter-deposited Au NPs in the device geometry exploits the UV absorption in Au NPs through interband transition along with exciton generation in ZnO, resulting in enhanced photocurrent generation in the UV region (365 nm). Moreover, the inherent pyroelectric property of the synthesized c axis oriented ZnO helps in boosting the speed of the fabricated device. The maximum photoresponsivity and specific detectivity of the fabricated device are calculated to be 4.68 AW−1 and 8.18 × 1011 Jones respectively in biased condition, thus making it one of the best among its compeer UV photodetectors. Additionally, the device demonstrates an ultrafast response time of 15 μs in the self-powered condition, which is another feather in its cap. So, this study opens up a new pathway for the application of combined carrier generation by interband transition and pyro-phototronic effect for the fabrication of highly responsive ultrafast pyro-phototronic UV detector.

中文翻译：

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用于制造高响应超快紫外光电探测器的 Au/ZnO 界面中的热电子学应用

摘要 我们报告了一种利用光伏和光致热电效应或热光电子效应相结合的高响应超快紫外光电探测器的制造。该器件架构具有分层配置，其中光敏层由金纳米粒子 (Au NPs) 和氧化锌 (ZnO) 组成。在器件几何结构中包含溅射沉积的 Au NPs 通过带间跃迁以及 ZnO 中的激子生成来利用 Au NPs 中的紫外线吸收，从而增强紫外线区域 (365 nm) 中的光电流生成。此外，合成的 c 轴取向 ZnO 的固有热电特性有助于提高制造器件的速度。所制造器件的最大光响应度和比检测率计算为 4.68 AW-1 和 8。18 × 1011 Jones 分别在偏置条件下，使其成为同类紫外光电探测器中最好的之一。此外，该器件在自供电条件下表现出 15 μs 的超快响应时间，这是它的另一个优点。因此，这项研究为通过带间跃迁和热光电子效应产生组合载流子的应用开辟了一条新途径，用于制造高响应的超快热光电子紫外探测器。