Tuyen Vuong Thanh, Ngo Duc Anh, Duy Le Thai, Hao Nguyen Duc, Tran Thi Nhu Hoa, Dang Vinh Quang, Van Tran T T
Faculty of Materials Science and Technology, University of Science Ho Chi Minh City Vietnam
Vietnam National University Ho Chi Minh City Vietnam.
RSC Adv. 2025 Jan 27;15(4):2727-2736. doi: 10.1039/d4ra07919a. eCollection 2025 Jan 23.
Infrared (IR) photodetectors play an important role in many fields such as industry, medicine, security, Achieving high response and maintaining stability in the device performance while reducing materials cost are required for the practical use of optical sensors. This study presents the development of a low-cost but high-performance IR photodetector based on a hybridization of up-conversion microparticles of NaYF:Tm,Yb (UCMPs) and reduced graphene oxide material (RGO). In this combination, UCMPs play the role of absorbing photons from 980 nm excitation light, generating electron-hole pairs, which are useful for sensing applications. Meanwhile, RGO acts as a charge collector or a charge transport layer because of its high mobility, good electro-conductivity, and large surface area. Through various characterization experiments in dark and light conditions, the analysis results confirm that our devices show sensitivity to IR light with excellent operation stability up to 30 days even stored in ambient conditions. Overall, the combination of UCMPs and RGO materials promises to increase the ability to absorb infrared light, the optical sensitivity of the photodetector.
红外（IR）光电探测器在工业、医学、安全等许多领域发挥着重要作用。对于光学传感器的实际应用而言，需要在降低材料成本的同时实现高响应并保持器件性能的稳定性。本研究展示了一种基于NaYF:Tm,Yb上转换微粒（UCMPs）与还原氧化石墨烯材料（RGO）杂交的低成本但高性能的红外光电探测器的研制。在这种组合中，UCMPs起到吸收980 nm激发光的光子、产生对传感应用有用的电子-空穴对的作用。同时，RGO由于其高迁移率、良好的导电性和大表面积而充当电荷收集器或电荷传输层。通过在黑暗和光照条件下的各种表征实验，分析结果证实我们的器件对红外光具有灵敏度，即使在环境条件下储存长达30天也具有出色的运行稳定性。总体而言，UCMPs和RGO材料的组合有望提高吸收红外光的能力以及光电探测器的光学灵敏度。
