Room-Temperature High-Detectivity Flexible Near-Infrared Photodetectors with Chalcogenide Silver Telluride Nanoparticles

Won Yong Lee, Kyoungdu Kim, Sin Hyung Lee, Jin Hyuk Bae, In Man Kang, Minsu Park, Kwangeun Kim, Jaewon Jang

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Herein, flexible near-infrared (NIR) photodetectors were prepared using silver telluride (Ag5Te3) nanoparticles (NPs) for optoelectronic applications. For the main channel materials of the photodetectors, Ag5Te3NPs were used, which were synthesized in an aqueous solution. Moreover, Ag5Te3thin films were successfully fabricated on plastic substrates at 150 °C using redistributed Ag5Te3NPs in aqueous inks. The crystal structure, chemistry, and optoelectronic properties of the synthesized photodetectors were studied. The fabricated flexible Ag5Te3-based photodetectors achieved a detectivity of 6.27 × 109cm Hz1/2W-1(>109) at room temperature under 0.35% compressive and tensile strains. The obtained detectivity value exceeds those of two-dimensional inorganic layered material phototransistors such as MoS2or commercial thermistor bolometers at room temperature (109). Furthermore, the proposed novel method for the synthesis of Ag5Te3thin films on plastic substrates can be applied to other Ag5Te3-based applications in the future.

Original languageEnglish
Pages (from-to)10262-10267
Number of pages6
JournalACS Omega
Volume7
Issue number12
DOIs
StatePublished - 29 Mar 2022

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