Active pixel image sensor array for dual vision using large-area bilayer WS2

IF 22.7 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Infomat Pub Date : 2024-01-04 DOI:10.1002/inf2.12513
Arindam Bala, Mayuri Sritharan, Na Liu, Muhammad Naqi, Anamika Sen, Gyuchull Han, Hyun Yeol Rho, Youngki Yoon, Sunkook Kim
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引用次数: 0

Abstract

Transition metal dichalcogenides (TMDs) are a promising candidate for developing advanced sensors, particularly for day and night vision systems in vehicles, drones, and security surveillance. While traditional systems rely on separate sensors for different lighting conditions, TMDs can absorb light across a broad-spectrum range. In this study, a dual vision active pixel image sensor array based on bilayer WS2 phototransistors was implemented. The bilayer WS2 film was synthesized using a combined process of radio-frequency sputtering and chemical vapor deposition. The WS2-based thin-film transistors (TFTs) exhibit high average mobility, excellent Ion/Ioff, and uniform electrical properties. The optoelectronic properties of the TFTs array exhibited consistent behavior and can detect visible to near-infrared light with the highest responsivity of 1821 A W−1 (at a wavelength of 405 nm) owing to the photogating effect. Finally, red, green, blue, and near-infrared image sensing capabilities of active pixel image sensor array utilizing light stencil projection were demonstrated. The proposed image sensor array utilizing WS2 phototransistors has the potential to revolutionize the field of vision sensing, which could lead to a range of new opportunities in various applications, including night vision, pedestrian detection, various surveillance, and security systems.

Abstract Image

Abstract Image

使用大面积双层 WS2 的双视觉主动像素图像传感器阵列
过渡金属二钙化层(TMD)是开发先进传感器的理想候选材料,尤其适用于车辆、无人机和安全监控中的日夜视觉系统。传统系统依赖于不同光照条件下的独立传感器,而 TMD 可在宽光谱范围内吸收光线。在这项研究中,实现了一种基于双层 WS2 光电晶体管的双视觉主动像素图像传感器阵列。双层 WS2 薄膜是通过射频溅射和化学气相沉积的组合工艺合成的。基于 WS2 的薄膜晶体管(TFT)具有高平均迁移率、优异的离子/离子交换和均匀的电气特性。TFT 阵列的光电特性表现一致,可以检测可见光至近红外光,由于光ogating 效应,最高响应度达到 1821 A W-1(波长为 405 纳米)。最后,演示了利用光模板投影的有源像素图像传感器阵列的红、绿、蓝和近红外图像传感能力。所提出的利用 WS2 光电晶体管的图像传感器阵列有可能彻底改变视觉传感领域,从而为各种应用带来一系列新机遇,包括夜视、行人检测、各种监控和安全系统。
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来源期刊
Infomat
Infomat MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
37.70
自引率
3.10%
发文量
111
审稿时长
8 weeks
期刊介绍: InfoMat, an interdisciplinary and open-access journal, caters to the growing scientific interest in novel materials with unique electrical, optical, and magnetic properties, focusing on their applications in the rapid advancement of information technology. The journal serves as a high-quality platform for researchers across diverse scientific areas to share their findings, critical opinions, and foster collaboration between the materials science and information technology communities.
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