Abstract Flexible and wearable photodetectors (PDs) that can be directly equipped on human bodies have attracted extensive attention due to their great potential in communication, health and safety applications. However, low flexibility and complicated fabrication process hinder the development of fiber- and textile-PDs for practical applications. Here, we use an efficient solution strategy to integrate CsPbBr3 nanosheets (NSs) into conventional ZnO nanowires (NWs)/graphene flexible thin film PDs based on PVDF substrate. Compared with the simpler ZnO NWs/graphene structure, the built-in electric field of ZnO/CsPbBr3 PN junction can facilitate the separation and transport of the photo-generated carriers. Moreover, the ZnO networks filled with CsPbBr3 NSs result in a smooth interface and close contacts with graphene. With the interface optimization, the enhanced transport efficiency of the carriers further leads to a high Ilight/Idark ratio of ∼103. In addition, such PVDF based PDs exhibit excellent flexibility, demonstrating great potential for practical flexible optoelectronics.

中文翻译：

---

改进的柔性 ZnO/CsPbBr3/石墨烯紫外光电探测器，通过溶液工艺优化界面

摘要 可直接安装在人体上的柔性可穿戴光电探测器（PD）因其在通信、健康和安全应用方面的巨大潜力而​​受到广泛关注。然而，低灵活性和复杂的制造工艺阻碍了纤维和纺织品 PD 在实际应用中的发展。在这里，我们使用有效的解决方案策略将 CsPbBr3 纳米片 (NSs) 集成到基于 PVDF 基板的传统 ZnO 纳米线 (NWs)/石墨烯柔性薄膜 PD 中。与更简单的 ZnO NWs/石墨烯结构相比，ZnO/CsPbBr3 PN 结的内置电场可以促进光生载流子的分离和传输。此外，填充有 CsPbBr3 NSs 的 ZnO 网络会产生光滑的界面并与石墨烯紧密接触。随着界面的优化，载流子传输效率的提高进一步导致了约 103 的高 Ilight/Idark 比。此外，这种基于 PVDF 的 PD 表现出优异的柔韧性，显示出实用柔性光电子学的巨大潜力。