Abstract
Detecting low intensity light requires photodetectors with high gain. Carbon nanotube (CNT) transistors functionalized with light absorbers have emerged as a promising approach to realize photodetectors that could approach single photon sensitivity at room temperature. Our previous work demonstrated high sensitivity for CNT transistors functionalized with C60, with modeling indicating that electron-donating sensitizers could lead to even better performance. Here we explore this concept and present a P3HT-functionalized CNT phototransistor capable of detecting 500 aW of visible light at room temperature, corresponding to a responsivity of 2e9 A/W (Gain > 4e9). Furthermore, the dynamical processes lead to a significantly improved response time down to the millisecond range. Combined, these factors suggest that functionalized quasi-one-dimensional channels are a promising path for next-generation room temperature photodetectors.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.