Quantitative measurement method for absolute photoluminescence quantum efficiency of near infrared quantum shear

A technology of quantum shearing and quantum efficiency, which is applied in the direction of fluorescence/phosphorescence, material excitation analysis, etc., can solve the problems of low measurement accuracy and inability to absolutely evaluate quantum shearing materials, and achieve the effect of improving measurement accuracy

Inactive Publication Date: 2014-06-18
HARBIN INST OF TECH
View PDF6 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing measurement method using theoretical quantum efficiency can only relatively evaluate the performance of quantum shearing materials, and the measurement ac...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Quantitative measurement method for absolute photoluminescence quantum efficiency of near infrared quantum shear
  • Quantitative measurement method for absolute photoluminescence quantum efficiency of near infrared quantum shear

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0022] Specific implementation mode one: see figure 1 Describe this embodiment, a near-infrared quantum shearing absolute photoluminescence quantum efficiency quantitative measurement method described in this embodiment, the method is realized based on an integrating sphere detection system, the integrating sphere detection system includes an integrating sphere 2, a filter Sheet 3, spectrometer 4, detector 5, data acquisition card 6 and computer 7, the light entrance of described integrating sphere 2 is used to receive the laser that excites light source 1 to send, after laser diffuse reflection in integrating sphere 2, by integrating After the light outlet of the ball 2 is emitted, after being filtered by the filter plate 3, it is emitted to the optical signal input end of the detector 5 through the spectrometer 4, and the electrical signal output end of the detector 5 is connected with the data signal input end of the data acquisition card 6, The data signal output end of da...

specific Embodiment approach 2

[0038] Embodiment 2: The difference between this embodiment and the quantitative measurement method of near-infrared quantum shear absolute photoluminescence quantum efficiency described in Embodiment 1 is that the reflectivity of the inner wall of the integrating sphere 2 is higher than 99%.

specific Embodiment approach 3

[0039] Specific embodiment three: the difference between this embodiment and a kind of near-infrared quantum shearing absolute photoluminescence quantum efficiency quantitative measurement method described in specific embodiment one or two is that the spectrometer 4 has a resolution of 1nm and a scanning range 200-1500nm.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a quantitative measurement method for the absolute photoluminescence quantum efficiency of near infrared quantum shear, relates to the field of the absolute luminous efficiency measurement of quantum shear materials, and solves the problems that the current measurement method adopting the theoretical quantum efficiency can only relatively evaluate the performance of the quantum shear materials, and the accuracy of measurement is low; as a result, the quantum shear materials cannot be absolutely evaluated. The quantitative measurement method comprises the following steps: putting a standard lamp into an integrating sphere of an integrating sphere detection system, and measuring the luminescence spectrum of the standard lamp to obtain the response function of the integrating sphere detection system; respectively causing laser to radiate into the empty integrating sphere, to radiate into the integrating sphere and not to directly radiate onto a sample and to radiate into the integrating sphere and to directly radiate onto the sample, thus obtaining spectrums of output laser of the integrating sphere and sample fluorescence under the three conditions; calibrating the spectrums of output laser of the integrating sphere and sample fluorescence, converting the calibrated spectrums to photon number distribution spectrums, carrying out integration on the photon number distribution spectrums, and computing to obtain the absolute quantum efficiency eta. The quantitative measurement method is applied to the field of quantitative measurement.

Description

technical field [0001] The invention relates to the field of measurement of absolute luminous efficiency of quantum shear materials. Background technique [0002] Near-infrared quantum shearing materials can realize the modulation of the solar spectrum, converting a photon with a wavelength of less than 550nm into two near-infrared photons with a wavelength of 1000nm, so that the solar spectrum can better match the response of Si-based solar cells, so that Reducing the loss caused by spectral mismatch while obtaining double the photocurrent in the band around 1000nm is expected to improve the efficiency of Si-based solar cells. At present, the theoretically calculated quantum efficiency is generally used to relatively evaluate the quantum shear performance of materials. However, researchers are also aware of a problem. Many factors that inhibit quantum efficiency are ignored in the calculation of theoretical quantum efficiency. The actual quantum efficiency is lower than th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01N21/64
Inventor 秦峰张云刚段倩倩赵华郑仰东张治国
Owner HARBIN INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap