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One-dimensional nano structure type three-dimensional direction microcell photovoltaic and lighting representing system and method

A nanostructure and photovoltaic technology, applied in materials excitation analysis and other directions, can solve the problems of photovoltaics that cannot measure three-dimensional directions, and cannot be synchronously characterized.

Active Publication Date: 2014-06-25
HUNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a system and method for characterization of photovoltaic and luminescence in three-dimensional direction micro-regions of one-dimensional nanostructures. At the same time, it also overcomes the problem that the existing technology can only measure the photovoltaic signal generated in a certain dimension, but cannot measure the photovoltaic in three dimensions.

Method used

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  • One-dimensional nano structure type three-dimensional direction microcell photovoltaic and lighting representing system and method
  • One-dimensional nano structure type three-dimensional direction microcell photovoltaic and lighting representing system and method
  • One-dimensional nano structure type three-dimensional direction microcell photovoltaic and lighting representing system and method

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Embodiment 1

[0071] CdS nanobelts are dispersed in the channel electrode so that the nanobelts are parallel or perpendicular to the electrode; the sandwich structure electrode is that the thickness direction of the nanobelt is perpendicular to the two electrodes, and the two ends of the channel electrode or the two electrodes of the sandwich structure are connected to the lock-in amplifier 9 is connected with a coaxial cable. The laser light emitted by the 488nm argon ion laser 1 is modulated by the chopper 2, coupled into the optical fiber, and introduced into the confocal microscope system. The laser light is focused by the objective lens 4 to the CdS nanobelts dispersed on the electrode 8, and the CdS nanobelts are excited. The photovoltaic signal has the same modulation frequency as the chopper, and the lock-in amplifier can amplify the photovoltaic signal generated by the CdS nanobelt after being synchronized by the chopper. The photovoltaic signal output by the lock-in amplifier is i...

Embodiment 2

[0077] The nanowires are dispersed within the channel electrode such that the nanowires are either parallel to the electrodes or perpendicular to the electrodes. Both ends of the channel electrode are connected with the lock-in amplifier 9 with a coaxial cable. The laser light emitted by the 488nm argon ion laser 1 is modulated by the chopper 2, coupled into the optical fiber, and introduced into the confocal microscope system 3. The laser light is focused by the objective lens 4 to the nanowires dispersed on the electrode 8, and the photovoltaic power generated after the nanowires are excited The modulation frequency of the signal is the same as that of the chopper, and the lock-in amplifier can amplify the photovoltaic signal generated by the nanowire after being synchronized by the chopper. The photovoltaic signal output by the lock-in amplifier is input into the confocal microscope system controller 10 through the coaxial cable. The luminescent signal simultaneously gener...

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Abstract

The invention discloses a one-dimensional nano structure three-dimensional direction microcell photovoltaic and lighting representing system and method. A one-dimensional nano structure is arranged in a channel electrode; an electrode does not need to be in ohmic contact with the one-dimensional nano structure; a tested nano wire / belt is moved through a micro probe to change the position of the nano wire / belt so as to enable the nano wire / belt to be parallel to or perpendicular to the electrode; photovoltaic generated when photogenerated charges are separated along the width or length direction is measured; photovoltaic generated when the photogenerated charges are separated along the height direction is measured by using a sandwich structure; meanwhile, with the combination of a coaxially triggered confocal microscopy, the size of a triggered light spot is focused to the limited diffraction size of light, and the synchronous scanning imaging measurement on the microcell photovoltaic and optical response of the resolution at the limited light diffraction is achieved.

Description

technical field [0001] The invention belongs to semiconductor nanostructure photoelectric measurement technology, in particular to a one-dimensional nanostructure three-dimensional direction micro-region photovoltaic and luminescence characterization system and method. Background technique [0002] Luminescence and photovoltaics are two fundamental physical processes that occur in semiconductor materials under the excitation of band-gap light. Luminescence is produced by the recombination of photogenerated electron-hole pairs, while photovoltaic is produced by the spatial separation of photogenerated electron-hole pairs. Often, the two are competing processes. Therefore, the simultaneous characterization of luminescence and photovoltaic signals will play a positive role in promoting the study and correct understanding of fundamental photophysical processes. [0003] Semiconductor one-dimensional nanostructures (including nanowires and nanobelts) have good optical and elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/63
Inventor 张清林潘安练
Owner HUNAN UNIV
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