Synthesis and wavelength-sensitive near-infrared photodetection performance of large-diameter single-walled carbon nanotubes with tailored bandgap distribution

• Applicant: Professor Dr. Ralph Krupke
• Subject Area: Electronic Semiconductors, Components and Circuits, Integrated Systems, Sensor Technology, Theoretical Electrical Engineering ; Synthesis and Properties of Functional Materials
• Term: from 2018 to 2022
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 392403255

• Final Report Year: 2022

Final Report Abstract

In this research project, the use of diameter-tailored large-diameter carbon nanotubes were successfully integrated into thin film devices for photodetection in the near-infrared (NIR) to shortwavelength infrared (SWIR) range. The photoresponse mechanism was identified as electrothermal or bolometric depending on the bias and the gate voltage. Spectrally flat NIR to SWIR photodetectors were also developed using thickness-adjusted nanocrystalline graphene/graphite layers. Stable and reproducible diffraction-limited scanning photocurrent spectroscopy characterization in the NIR to SWIR range were enabled by several measures. The supercontinuum light source spectrum was smoothed by implementing acousto-optic tunable filters (AOTF) induced wavelength-dependent intensity modulation. The large chromatic aberration was compensated by automatic adjustment of the wavelength-dependent working distance. The Femtoampere noise floor was reached by ultra-low noise cabling and preamplifier, and a concentric design of the photocurrent setup was implemented to maximize temperature stability and eliminate drift.

Publications

• Low-Temperature Electroluminescence Excitation Mapping of Excitons and Trions in Short- Channel Monochiral Carbon Nanotube Devices; ACS nano 2020, 14 (3), 2709–2717
  Marco Gaulke, Alexander Janissek, Naga Anirudh Peyyety, Imtiaz Alamgir, Adnan Riaz, Simone Dehm, Han Li, Uli Lemmer, Benjamin S. Flavel, Manfred M. Kappes, Frank Hennrich, Li Wei, Yuan Chen, Felix Pyatkov, Ralph Krupke
  
• Separation of Specific Single-Enantiomer Single-Wall Carbon Nanotubes in the Large- Diameter Regime, ACS nano 2020, 14 (1), 948–963
  Han Li, Georgy Gordeev, Oisin Garrity, Naga Anirudh Peyyety, Pranauv Balaji Selvasundaram, Simone Dehm, Ralph Krupke, Sofie Cambré, Wim Wenseleers, Stephanie Reich, Ming Zheng, Jeffrey A. Fagan, Benjamin S. Flavel
  
• Tailoring Spectrally Flat Infrared Photodetection with Thickness-Controlled Nanocrystalline Graphite; ACS Appl. Mater. Interfaces 2022, 14(7), 9525–9534
  Naga Anirudh Peyyety, Sandeep Kumar, Min-Ken Li, Simone Dehm, Ralph Krupke
  
• Near-Infrared Photodetection in Nanocarbon Materials, Ph.D. thesis 2023, Technische Universität Darmstadt
  Naga Anirudh Peyyety