Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
A Flexible and Wearable Photodetector Enabling Ultra-Broadband Imaging from Ultraviolet to Millimeter-Wave Regimes
Advanced Science ( IF 14.3 ) Pub Date : 2024-04-24 , DOI: 10.1002/advs.202401631 Shaojing Liu 1 , Ximiao Wang 1 , Ningsheng Xu 1 , Runli Li 1 , Hai Ou 1 , Shangdong Li 1 , Yongsheng Zhu 1 , Yanlin Ke 1 , Runze Zhan 1 , Huanjun Chen 1 , Shaozhi Deng 1
Advanced Science ( IF 14.3 ) Pub Date : 2024-04-24 , DOI: 10.1002/advs.202401631 Shaojing Liu 1 , Ximiao Wang 1 , Ningsheng Xu 1 , Runli Li 1 , Hai Ou 1 , Shangdong Li 1 , Yongsheng Zhu 1 , Yanlin Ke 1 , Runze Zhan 1 , Huanjun Chen 1 , Shaozhi Deng 1
Affiliation
|
Flexible and miniaturized photodetectors, offering a fast response across the ultraviolet (UV) to millimeter (MM) wave spectrum, are crucial for applications like healthcare monitoring and wearable optoelectronics. Despite their potential, developing such photodetectors faces challenges due to the lack of suitable materials and operational mechanisms. Here, the study proposes a flexible photodetector composed of a monolayer graphene connected by two distinct metal electrodes. Through the photothermoelectric effect, these asymmetric electrodes induce electron flow within the graphene channel upon electromagnetic wave illumination, resulting in a compact device with ultra-broadband and rapid photoresponse. The devices, with footprints ranging from 3 × 20 µm2 to 50 × 20 µm2, operate across a spectrum from 325 nm (UV) to 1.19 mm (MM) wave. They demonstrate a responsivity (RV) of up to 396.4 ± 5.1 mV W−1, a noise-equivalent power (NEP) of 8.6 ± 0.1 nW Hz−0.5, and a response time as small as 0.8 ± 0.1 ms. This device facilitates direct imaging of shielded objects and material differentiation under simulated human body-wearing conditions. The straightforward device architecture, aligned with its ultra-broadband operational frequency range, is anticipated to hold significant implications for the development of miniaturized, wearable, and portable photodetectors.
中文翻译：
灵活且可穿戴的光电探测器可实现从紫外线到毫米波范围的超宽带成像
灵活的小型光电探测器可在紫外 (UV) 到毫米 (MM) 波谱范围内提供快速响应，对于医疗保健监测和可穿戴光电器件等应用至关重要。尽管具有潜力，但由于缺乏合适的材料和操作机制，开发此类光电探测器仍面临挑战。在这里，该研究提出了一种由单层石墨烯组成的柔性光电探测器，该单层石墨烯通过两个不同的金属电极连接。通过光热电效应，这些不对称电极在电磁波照射下在石墨烯通道内诱导电子流，从而形成具有超宽带和快速光响应的紧凑器件。这些器件的占地面积范围为 3 × 20 µm 2至 50 × 20 µm 2 ，工作波长范围为 325 nm (UV) 至 1.19 mm (MM)。它们表现出高达 396.4 ± 5.1 mV W −1的响应度 ( R V )、8.6 ± 0.1 nW Hz − 0.5的噪声等效功率 (NEP) 和小至 0.8 ± 0.1 ms 的响应时间。该设备有助于在模拟人体佩戴条件下对屏蔽物体进行直接成像和材料区分。简单的设备架构与其超宽带工作频率范围相一致，预计将对小型化、可穿戴和便携式光电探测器的开发产生重大影响。
更新日期：2024-04-24
中文翻译：
灵活且可穿戴的光电探测器可实现从紫外线到毫米波范围的超宽带成像
灵活的小型光电探测器可在紫外 (UV) 到毫米 (MM) 波谱范围内提供快速响应，对于医疗保健监测和可穿戴光电器件等应用至关重要。尽管具有潜力，但由于缺乏合适的材料和操作机制，开发此类光电探测器仍面临挑战。在这里，该研究提出了一种由单层石墨烯组成的柔性光电探测器，该单层石墨烯通过两个不同的金属电极连接。通过光热电效应，这些不对称电极在电磁波照射下在石墨烯通道内诱导电子流，从而形成具有超宽带和快速光响应的紧凑器件。这些器件的占地面积范围为 3 × 20 µm 2至 50 × 20 µm 2 ，工作波长范围为 325 nm (UV) 至 1.19 mm (MM)。它们表现出高达 396.4 ± 5.1 mV W −1的响应度 ( R V )、8.6 ± 0.1 nW Hz − 0.5的噪声等效功率 (NEP) 和小至 0.8 ± 0.1 ms 的响应时间。该设备有助于在模拟人体佩戴条件下对屏蔽物体进行直接成像和材料区分。简单的设备架构与其超宽带工作频率范围相一致，预计将对小型化、可穿戴和便携式光电探测器的开发产生重大影响。
京公网安备 11010802027423号