A method for measuring the conversion efficiency of down-conversion luminescent thin films

A technology of luminescent film and conversion efficiency, applied in the field of scientific testing, can solve the problems of small detection area, error of test results, complicated calculation process, etc., and achieve the effect of avoiding incomplete collection of fluorescence and eliminating influence

A technology of luminescent film and conversion efficiency, applied in the field of scientific testing, can solve the problems of small detection area, error of test results, complicated calculation process, etc., and achieve the effect of avoiding incomplete collection of fluorescence and eliminating influence

CN103162942BInactive Publication Date: 2015-10-07UNIV OF SHANGHAI FOR SCI & TECH
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  • A method for measuring the conversion efficiency of down-conversion luminescent thin films
  • A method for measuring the conversion efficiency of down-conversion luminescent thin films
  • A method for measuring the conversion efficiency of down-conversion luminescent thin films

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] Taking Lumogen thin film as an example, calculate its conversion efficiency when it is excited by 250nm ultraviolet light.

[0024] The measuring method that adopts the ultraviolet-visible spectrophotometer accessory integrating sphere of the present invention may further comprise the steps:

[0025] Step 1. Use a fluorescence spectrometer (Beijing Zhuoli Fluorescence Spectrometer), set the first excitation light to 250nm, and measure the fluorescence emission spectrum of the down-conversion luminescent film in a certain emission wavelength range, such as image 3 As shown, the abscissa is the wavelength, the ordinate is the photon number of emitted light, and the step size between the wavelengths in the fluorescence emission spectrum is a=2nm, λ 0 and lambda n 400nm and 750nm, respectively, to obtain the number of emitted photons E(...

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Abstract

Provided is a measuring method of down-conversion luminescence film conversion efficiency. The measuring method of the down-conversion luminescence film conversion efficiency comprises the following steps: a, adopting a fluorescence spectrometer to obtain emitting photon numbers E(lambada) under different emission wavelengths in a fluorescence emission spectrum wavelength range; b, dividing incident light into reference light and second exciting light based on a dual light path detection mode of an accessory integrating sphere of an ultraviolet spectrophotometer, setting a proportionality coefficient k of reference light energy to second exciting light energy, and measuring and obtaining the reference light energy Eref; c, carrying out scaling on a transmittance of a band-pass filter, and obtaining a transmittance curve T(lambada) of the band-pass filter; d, adopting the integrating sphere to measure emitting light energy EEmi; and f, obtaining conversion efficiency of luminescence film under light illumination at a specific wavelength based on a computation formula of the conversion efficiency (CE).

Description

technical field [0001] The invention belongs to the technical field of scientific testing and relates to a method for measuring the conversion efficiency of a down-conversion luminescent film. Background technique [0002] Fluorescent luminescent technology usually utilizes the change of luminescent wavelength after the material is excited, such as LED photoluminescent materials and up-conversion materials of solar cells. In the silicon-based ultraviolet detection technology, the luminescent film can convert high-energy photons into a large number of low-energy photons, so the detector response can be broadened to the ultraviolet band. Conversion efficiency CE (Conversion Efficiency) is an important parameter to measure the above-mentioned conversion luminescence process. [0003] There are two traditional test methods for conversion efficiency. One is to calculate the conversion efficiency by measuring the quantum efficiency, which is calculated by the number of electrons ...

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Application Information

Patent Timeline
07 Oct 2015
Publication
CN103162942B
IPC
G01M11/02
Inventors
卢忠荣; 陶春先