Uncooled Carbon Nanotube Photodetectors

TL;DR

This paper reviews the development of uncooled carbon nanotube photodetectors, highlighting their mechanisms, performance metrics, and potential for future improvements in various applications.

Contribution

It provides a comprehensive overview of CNT-based photodetectors, emphasizing their operational mechanisms and comparative performance metrics.

Findings

Various CNT photodetectors have been realized with different mechanisms.

Performance metrics vary across different CNT photodetector types.

Outlook for performance improvements suggests ongoing research potential.

Abstract

Photodetectors play key roles in many applications such as remote sensing, night vision, reconnaissance, medical imaging, thermal imaging, and chemical detection. Several properties such as performance, reliability, ease of integration, cost, weight, and form factor are all important in determining the attributes of photodetectors for particular applications. While a number of materials have been used over the past several decades to address photodetection needs across the electromagnetic spectrum, the advent of nanomaterials opens new possibilities for photodetectors. In particular, carbon-based nanomaterials such as carbon nanotubes (CNTs) and graphene possess unique properties that have recently been explored for photodetectors. Here, we review the status of the field, presenting a broad coverage of the different types of photodetectors that have been realized with CNTs, placing particular emphasis on the types of mechanisms that govern their operation. We present a comparative summary of the main performance metrics for such detectors, and an outlook for performance improvements.