Uncooled Carbon Nanotube Photodetectors

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.2

Highly Sensitive Broadband Single‐Walled Carbon Nanotube Photodetectors Enhanced by Separated Graphene Nanosheets

“…[1,2] Metallic SWCNTs are usually used as the transparent electrodes, while the semiconducting SWCNTs (S-SWCNTs) have been widely used as promising photoactive materials for solar cell, photodetectors. [1,2] Metallic SWCNTs are usually used as the transparent electrodes, while the semiconducting SWCNTs (S-SWCNTs) have been widely used as promising photoactive materials for solar cell, photodetectors.…”

Plasmon‐Induced Enhancement of Infrared Detection Using a Carbon Nanotube Diode

“…However, many problems, mainly including mismatch with a silicon-based readout circuit, cost of cooling systems, and complexity of the fabrication of perfect materials, restrict the development of such an ideal IR detector with a high performance and a low cost. [27] Only incident photons with polarization parallel to a CNT can interact effectively with excitons caused by E ii transitions (for example, E 11 and E 22 transition), corresponding to significant exciton resonant peaks. [22,23] Many groups confirmed exciton resonance absorption using different methods including scanning photocurrent spectra [24,25] and two-photon absorption.…”

“…[6][7][8][9][10] Owing to its outstanding properties, it shows a great potential for application in uncooled IR detection systems. [11] With its robust properties at a high temperature and strong illumination, [12] a CNT exhibits a better stability than HgCdTe or other IR materials, which also turns out to be compatible with the silicon complementary metal oxide semiconductor (CMOS) technology. Especially, CNTs have many remarkable intrinsic photonic and electric properties [13,14] that are suitable for photodetection.…”

“…However, normal CNT thin films with few layers also cannot absorb incident radiation efficiently because of the limited thickness, which results in a low quantum efficiency. [11] Moreover, exciton effects dominate the It is demonstrated that a plasmonic contact electrode can significantly enhance the performance of carbon nanotube (CNT) infrared (IR) detectors based on a barrier-free bipolar diode. Many researches were devoted to enhance the quantum efficiency, for example, compound system development, where CNTs were mixed with C60, [5] quantum dots, [21] or an organic material.…”

Асимметричные Устройства На Основе Углеродных Нанотрубок Для Детектирования Излучения Терагерцового Диапазона

“…В основном речь идет о высокой подвижности носителей заряда, возможности перестройки свойств затворным напряжением и влиянии геометрических размеров на параметры зонной струк-туры. Полученные на данный момент результаты [1][2][3][4][5][6] свидетельствуют о перспективности этого направления исследований с точки зрения получения практических результатов.…”