基于单个 PdTe2/Thin Si/PdTe2 异质结的自驱动宽带波长传感器,Journal of Materials Chemistry C

当前位置： X-MOL 学术 › J. Mater. Chem. C › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

基于单个 PdTe2/Thin Si/PdTe2 异质结的自驱动宽带波长传感器
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2022-09-01 , DOI: 10.1039/d2tc02850f
Xiao-Wei Tong ₁ , Min Fan ₁ , Chao Xie ₂ , Li Wang ₃ , Hai-Bo Wang ₁ , Qin-Qin Qian ₁ , Shi-Bin Lu ₁ , Lin Jin ₁ , Zhong-Xiang Zhang ₁

Affiliation

在这项工作中，我们报告了一种由单个 PdTe ₂ /thin Si/PdTe _{2几何组成的灵敏波长传感器}能够定量区分从深紫外到近红外光谱的入射光波长的异质结。异质结突出的光伏活性赋予了该器件在没有外部电源的情况下工作的能力。由于波长相关的光吸收特性以及与距离相关的电荷载流子复合行为，异质结器件在光照射下在光生成速率相对于结面积的分布和光载流子中的不同复合活性方面表现出深刻的对比来自相反方向的不同波长。因此，它在前照式和背照式模式下显示出完全不同的光谱光响应。所以，与入射光波长的关系可以通过单调函数进行数值描述，通过该函数可以准确区分从 265 到 1050 nm 的波长，平均绝对误差低于 10 nm。这项工作为开发高灵敏度波长传感器铺平了一条有效的道路，在未来的光电设备和系统中具有巨大的前景。

"点击查看英文标题和摘要"

A self-driven wideband wavelength sensor based on an individual PdTe2/Thin Si/PdTe2 heterojunction

In this work, we report on a sensitive wavelength sensor composed geometrically of an individual PdTe₂/thin Si/PdTe₂ heterojunction that is able to quantitatively discriminate incident light wavelengths spanning from the deep-ultraviolet to the near-infrared spectrum. The prominent photovoltaic activity of the heterojunction endows the device with the ability to work in the absence of extrinsic power supply. Owing to the wavelength-dependent optical absorption characteristics as well as the distance-related charge carrier recombination behavior, the heterojunction device exhibits deep contrast in the distribution of photo-generation rate relative to the junction area and different recombination activities in photocarriers, upon light irradiation with varied wavelengths from opposite directions. As a consequence, it shows completely different spectral photoresponses in front-illuminated and back-illuminated modes. Therefore, the corresponding photocurrent ratio of the device versus incident light wavelength can be numerically depicted through a monotone function, via which one can accurately discriminate the wavelength spanning from 265 to 1050 nm with an average absolute error of below 10 nm. This work paves an effective avenue for developing highly sensitive wavelength sensors, which hold enormous promise in future photoelectrical devices and systems.

更新日期：2022-09-01

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南