光电探测器
量子点
石墨烯
光电子学
响应度
材料科学
紫外线
异质结
纳米技术
光学
物理
作者
A. Shultz,Bo Liu,Maogang Gong,Mohammed Alamri,Michael Walsh,Russell C. Schmitz,Judy Wu
出处
期刊:ACS applied nano materials
[American Chemical Society]
日期:2022-11-03
卷期号:5 (11): 16896-16905
被引量:15
标识
DOI:10.1021/acsanm.2c03839
摘要
Colloidal quantum dot (QD)/graphene nanohybrid heterostructures provide a promising scheme for quantum sensors as they take advantage of the strong quantum confinement in QDs with enhanced light–matter interaction, spectral tunability, suppressed phonon scattering, and extraordinary charge mobility in graphene at room temperature. Herein, we report development of a flexible, nine-channel PbS QD/graphene nanohybrid imaging array on polyethylene terephthalate using a facile process for device fabrication, signal acquisition, and processing. The PbS QD/graphene imaging array exhibited high and uniform photoresponse. At a 1.0 V bias, the highest responsivity was 9.56 × 103–3.24 × 103 A/W for 400–1000 nm incident light [ultraviolet–visible–near-infrared (UV–vis–NIR)] with a power of 900 pW. In addition, the array has a consistent spectral response with bending down to a radius of curvature of a few millimeters. The demonstration of imaging at broadband wavelengths in the UV–vis–NIR range indicates that QD/graphene nanohybrids provide a viable approach for flexible photodetectors and imagers.
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