Loading…

A high-performance photodetector based on small-bundled single-wall carbon nanotube film/silicon heterojunctions

Single-wall carbon nanotube (SWCNT)/n-type silicon (n-Si) heterojunctions with a high photoresponsivity are considered promising for use in photodetectors. However, the performance of large-area SWCNT film/n-Si heterojunction-based photodetectors has been much lower than that fabricated using isolat...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2022-08, Vol.1 (32), p.16986-16994
Main Authors: Zhao, Yi-Ming, Hu, Xian-Gang, Shi, Chao, Ding, Wu-Tong, Hou, Peng-Xiang, Liu, Chang, Cheng, Hui-Ming
Format: Article
Language:English
Subjects:
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Single-wall carbon nanotube (SWCNT)/n-type silicon (n-Si) heterojunctions with a high photoresponsivity are considered promising for use in photodetectors. However, the performance of large-area SWCNT film/n-Si heterojunction-based photodetectors has been much lower than that fabricated using isolated SWCNTs, where the efficient assembly of SWCNT networks with the desired structure is a key issue. In this study, we prepared a small-bundled SWCNT (SB-SWCNT) film with a carbon-welding structure at tube-tube junctions, which greatly decreased the contact resistance and improved the work function. The fabricated SB-SWCNT film/n-Si heterojunction-based photodetectors showed a very high detectability of 4.2 × 10 13 Jones for an 890 nm laser with 0 bias, much higher than that of commercial photodetectors. The detectors also demonstrated good stability with a 97% R value retained after being exposed in air for 30 days, and a broad spectral response (540-1090 nm). A single-wall carbon nanotube/Si heterojunction photodetector fabricated using a small-bundled SWCNT film with a carbon-welding structure at tube/tube junctions shows a high responsivity ( R ) of 0.43 A W −1 and high detectability ( D *) of 4.2 × 10 13 Jones.
ISSN:2050-7488
2050-7496
DOI:10.1039/d2ta04209f