The formation of nanoscale junctions among nanoparticles in self-assembled nanostructures is crucial for improving both interfacial conductivity and structural integrity. However, the inherent reliance on weak van der Waals forces to hold nanoparticles together poses challenges in developing commercially viable devices due to their inefficient carrier transport characteristics. This study presents the successful integration of carbon nanotubes (CNTs) into highly porous nanomicrocluster arrays of ZnO, resulting in the formation of cohesive and crack-free highly porous ZnO/CNT heterojunction films. This integration marks a significant improvement in UV photodetection performance, demonstrating a record-high photocurrent to dark current ratio of 3.3 × 10⁶ and an exceptional responsivity of 18.5 A/W at a low bias of 0.5 V and under an ultra low light density of 25 μW/cm². These findings underscore the efficacy of this high-performance structure as a versatile and scalable platform technology for the rapid, cost-effective fabrication of hybrid photodetectors in wearable and portable devices.

中文翻译：

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高孔隙 ZnO/CNT 混合微团簇可实现卓越的紫外光电检测

自组装纳米结构中纳米颗粒之间纳米级连接的形成对于提高界面电导率和结构完整性至关重要。然而，由于其低效的载流子传输特性，固有地依赖弱范德华力将纳米粒子结合在一起，这给开发商业上可行的设备带来了挑战。这项研究成功地将碳纳米管 (CNT) 集成到高度多孔的 ZnO 纳米微簇阵列中，从而形成了内聚且无裂纹的高度多孔 ZnO/CNT 异质结薄膜。这种集成标志着紫外光电检测性能的显着改进，展示了创纪录的 3.3 × 10 ⁶光电流与暗电流比，以及在 0.5 V 的低偏压和 100 nm 超低光密度下 18.5 A/W 的出色响应度。 25微瓦/厘米²。这些发现强调了这种高性能结构作为一种多功能且可扩展的平台技术的功效，可用于快速、经济高效地制造可穿戴和便携式设备中的混合光电探测器。