Breaking the Built-In Electric Field Barrier in p-n Heterojunction for Self-Powered, Wavelength Distinguishable Photoelectrochemical Photodetectors: Toward Low Power Consumption and Secure Underwater Wireless Sensor Network

被引：9

作者：

Fathabadi, Milad ^{[1
]}

Yin, Yangyuan ^{[2
]}

Li, Shichen ^{[1
]}

Zhao, Songrui ^{[1
]}

机构：

[1] McGill Univ, Dept Elect & Comp Engn, 3480 Univ St, Montreal, PQ H3A 0E9, Canada

[2] South China Univ Technol, Sch Microelect, Guangzhou 510640, Peoples R China

来源：

ADVANCED OPTICAL MATERIALS | 2024年 / 12卷 / 11期

基金：

加拿大自然科学与工程研究理事会;

关键词：

p-n junction; self-powered photodetectors; tunnel junction; underwater wireless sensor network; wavelength distinguishable; HYDROGEN-PRODUCTION; NANOWIRES; EFFICIENT; TRENDS;

D O I：

10.1002/adom.202302372

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Self-powered, light wavelength distinguishable photodetectors (PDs) are appealing components to build a robust, secure, and low energy consumption underwater wireless sensor network (UWSN). However, achieving such devices is extremely difficult even today. In this context, the first self-powered, light wavelength distinguishable PDs with photoelectrochemical (PEC) principles and using tunnel junction (TJ) to overcome the technical hurdles for self-powered, light wavelength distinguishable PEC-PDs with p-n junction working electrode is reported. For such devices, a single photoelectrode is used, that is, one photoelectrode is able to distinguish different light wavelengths without using any external electrical power, and they are able to distinguish light wavelengths in both the ultraviolet (UV) and blue wavelength ranges. High responsivities reaching mA/W range and ultrafast response time with less than 10 ms are achieved in self-powered operation mode. Moreover, such devices are able to operate not only in acidic but also in NaCl electrolyte, making them potentially attractive for applications in ocean environment. In the end, it is demonstrated that leveraging such PEC-PDs, excellent data security can be achieved in the data communication mimicking that in an UWSN in ocean environment. This study not only represents a breakthrough in PDs, but also significantly advances the development of UWSNs, especially for ocean environment. This study is on the report of self-powered, light wavelength distinguishable photodetectors with photoelectrochemical principles using semiconductor nanowire p-n heterojunctions. Enhanced data transmission security leveraging such devices is further demonstrated. This study not only represents a breakthrough in photodetectors, but could also advance the development of underwater wireless sensor network.image

引用

页数：9