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Title: Photo-modulated thin film transistor based on dynamic charge transfer within quantum-dots-InGaZnO interface

The temporal development of next-generation photo-induced transistor across semiconductor quantum dots and Zn-related oxide thin film is reported in this paper. Through the dynamic charge transfer in the interface between these two key components, the responsibility of photocurrent can be amplified for scales of times (∼10{sup 4} A/W 450 nm) by the electron injection from excited quantum dots to InGaZnO thin film. And this photo-transistor has a broader waveband (from ultraviolet to visible light) optical sensitivity compared with other Zn-related oxide photoelectric device. Moreover, persistent photoconductivity effect can be diminished in visible waveband which lead to a significant improvement in the device's relaxation time from visible illuminated to dark state due to the ultrafast quenching of quantum dots. With other inherent properties such as integrated circuit compatible, low off-state current and high external quantum efficiency resolution, it has a great potential in the photoelectric device application, such as photodetector, phototransistor, and sensor array.
Authors:
 [1] ;  [2] ; ;  [3] ; ; ; ; ;  [1] ;  [3] ;  [4] ;  [1] ;  [4]
  1. Electronic Science and Engineering School, Southeast University, Nanjing (China)
  2. (China)
  3. National Center for Nanoscience and Technology, Beijing (China)
  4. (United Kingdom)
Publication Date:
OSTI Identifier:
22257737
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 36 MATERIALS SCIENCE; INTEGRATED CIRCUITS; OXIDES; PHOTOCONDUCTIVITY; QUANTUM DOTS; QUANTUM EFFICIENCY; SEMICONDUCTOR MATERIALS; THIN FILMS; TRANSISTORS; ULTRAVIOLET RADIATION; VISIBLE RADIATION