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Solution-Processed Layered Gallium Telluride Thin-Film Photodetectors

Journal Article · · ACS Photonics
 [1];  [1];  [1];  [2];  [3]
  1. Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering
  2. Northwestern Univ., Evanston, IL (United States). Graduate Program in Applied Physics
  3. Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering; Northwestern Univ., Evanston, IL (United States). Graduate Program in Applied Physics; Northwestern Univ., Evanston, IL (United States). Dept. of Chemistry; Northwestern Univ., Evanston, IL (United States). Dept. of Electrical Engineering and Computer Science
Using scalable solution processing, layered gallium telluride (GaTe) nanoflake dispersions are produced in surfactant-free, low-boiling-point, water–ethanol cosolvent mixtures. During exfoliation, chemical degradation of the ambient-reactive GaTe crystals is minimized by using deoxygenated solvents in a sealed tip ultrasonication system. The structural and chemical integrity of the solution-processed GaTe nanoflakes is subsequently confirmed with a comprehensive suite of microscopic and spectroscopic analyses. Furthermore, field-effect transistors and phototransistors based on individual solution-processed GaTe nanoflakes show electronic and optoelectronic properties, respectively, that are comparable to micromechanically exfoliated GaTe. Minimal solution-processing residues from the surfactant-free, low-boiling-point cosolvent dispersion medium coupled with the high intrinsic hole doping of GaTe produces the highest electrical conductivity among solution-processed layered nanoflake thin films without post-treatment. Large-area photodetectors based on these electrically percolating thin films of solution-processed GaTe nanoflakes show a positive correlation between responsivity and illumination intensity, with a high photoconversion gain that is explained by a combination of defect-mediated optical processes and photothermal effects. Finally, overall, this study establishes solution-processed layered GaTe nanoflakes as a leading candidate for high-performance, large-area, thin-film photodetectors.
Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Light Energy Activated Redox Processes (LEAP); Northwestern Univ., Evanston, IL (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
SC0001059
OSTI ID:
1566582
Journal Information:
ACS Photonics, Journal Name: ACS Photonics Journal Issue: 10 Vol. 5; ISSN 2330-4022
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (42)

Inkjet Printing of MoS 2 journal August 2014
High-Performance Flexible Broadband Photodetector Based on Organolead Halide Perovskite journal September 2014
High Responsivity Phototransistors Based on Few-Layer ReS 2 for Weak Signal Detection journal February 2016
Long‐Term Structural Evolution of an Intercalated Layered Semiconductor journal March 2017
High-Gain Phototransistors Based on a CVD MoS 2 Monolayer journal May 2013
Bandgap Restructuring of the Layered Semiconductor Gallium Telluride in Air journal May 2016
Solution-Based Processing of Optoelectronically Active Indium Selenide journal August 2018
Fullerene Photodetectors with a Linear Dynamic Range of 90 dB Enabled by a Cross-Linkable Buffer Layer journal February 2013
A Mixed-Solvent Strategy for Efficient Exfoliation of Inorganic Graphene Analogues journal September 2011
XPS study of InTe and GaTe single crystals oxidation journal May 2006
Solution-Based Processing of Monodisperse Two-Dimensional Nanomaterials journal February 2017
Ultraefficient Ultraviolet and Visible Light Sensing and Ohmic Contacts in High-Mobility InSe Nanoflake Photodetectors Fabricated by the Focused Ion Beam Technique journal January 2018
Solvent Exfoliation of Electronic-Grade, Two-Dimensional Black Phosphorus journal February 2015
In-Plane Optical Anisotropy of Layered Gallium Telluride journal August 2016
Near-Infrared Photodetector Based on MoS 2 /Black Phosphorus Heterojunction journal March 2016
Self-Assembled Layer (SAL)-Based Doping on Black Phosphorus (BP) Transistor and Photodetector journal June 2017
Surface Oxidation Doping to Enhance Photogenerated Carrier Separation Efficiency for Ultrahigh Gain Indium Selenide Photodetector journal October 2017
Atomic Layer GaSe/MoS 2 van der Waals Heterostructure Photodiodes with Low Noise and Large Dynamic Range journal December 2017
Extraordinary Photoresponse in Two-Dimensional In 2 Se 3 Nanosheets journal December 2013
High-Sensitivity Photodetectors Based on Multilayer GaTe Flakes journal December 2013
Thickness sorting of two-dimensional transition metal dichalcogenides via copolymer-assisted density gradient ultracentrifugation journal November 2014
Liquid exfoliation of solvent-stabilized few-layer black phosphorus for applications beyond electronics journal October 2015
Single-layer MoS2 transistors journal January 2011
Electronics and optoelectronics of two-dimensional transition metal dichalcogenides journal November 2012
Ultrasensitive photodetectors based on monolayer MoS2 journal June 2013
Atomically thin p–n junctions with van der Waals heterointerfaces journal August 2014
Black phosphorus field-effect transistors journal March 2014
High electron mobility, quantum Hall effect and anomalous optical response in atomically thin InSe journal November 2016
Water-based and biocompatible 2D crystal inks for all-inkjet-printed heterostructures journal January 2017
Black phosphorus ink formulation for inkjet printing of optoelectronics and photonics journal August 2017
Inkjet deposition of liquid-exfoliated graphene and MoS 2 nanosheets for printed device applications journal January 2014
Large variations in both dark- and photoconductivity in nanosheet networks as nanomaterial is varied from MoS 2 to WTe 2 journal January 2015
Functional inks and printing of two-dimensional materials journal January 2018
Photoconductivity of solution-processed MoS2 films journal January 2013
Band-like transport in high mobility unencapsulated single-layer MoS 2 transistors journal April 2013
Stable aqueous dispersions of optically and electronically active phosphorene journal April 2016
Electronic band structure of GaSe(0001):  Angle-resolved photoemission and ab initio theory journal September 2003
Bolometric Infrared Photoresponse of Suspended Single-Walled Carbon Nanotube Films journal April 2006
Two-Dimensional Nanosheets Produced by Liquid Exfoliation of Layered Materials journal February 2011
Liquid Exfoliation of Layered Materials journal June 2013
All-printed thin-film transistors from networks of liquid-exfoliated nanosheets journal April 2017
Electronic Transport in Two-Dimensional Materials journal April 2018

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