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Fluorescent nanoparticle as well as preparation method and application thereof

A nano-fluorescence and nano-particle technology, applied in the field of nano-fluorescence particles and their preparation, can solve problems such as difficult dispersibility, and achieve the effects of reducing power generation costs and improving photoelectric conversion efficiency.

Inactive Publication Date: 2012-08-01
TRINASOLAR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a novel nano-fluorescent material with wavelength conversion function, which can convert solar light waves with low photoelectric responsivity or no responsivity in solar cells, and solve the problems of traditional fluorescent materials in transparent substrates. Difficult to disperse and easy migration in the conversion layer, improve the photoelectric conversion efficiency of solar cells, and reduce the power generation cost of solar photovoltaic systems

Method used

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  • Fluorescent nanoparticle as well as preparation method and application thereof
  • Fluorescent nanoparticle as well as preparation method and application thereof
  • Fluorescent nanoparticle as well as preparation method and application thereof

Examples

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Embodiment 1

[0023] A preparation method of polyacrylic acid copolymer-silica nano fluorescent particles grafted with α-benzoyl cinnamonitrile (λmax (ex): 420nm; λmax (ex): 630nm) , with the following steps:

[0024] (1) Take 10 parts of nano-silica by mass ratio, add 10 parts of water, and stir at a high speed for 50 minutes through an emulsifier to obtain a light blue translucent nano-silica dispersion containing hydroxyl groups on the surface;

[0025] (2) Add 2 parts of KH-550 silane coupling agent to the system of step (1), continue to stir for 2 hours and then heat up to 85°C for reflux for 3 hours to obtain nano-silica containing amino groups on the surface, with an average particle size of 50nm. The mixture was centrifuged to take the precipitate, washed twice with absolute ethanol and toluene, and then dispersed in toluene; under the condition of ice-water bath, 2 parts of triethylamine and 4 parts of 2-bromoisobutyryl bromide were added to the system, and the reaction After 1 ho...

Embodiment 2

[0033] A polystyrene copolymer-silicon dioxide nano fluorescent particle grafted with anthracene (λmax (ex): 350nm; λmax (ex): 500nm), the preparation steps are as follows:

[0034] (1) Take 10 parts of nano-silica by mass ratio, add 10 parts of water, and stir at a high speed through an emulsifier to obtain a translucent light blue nano-silica dispersion with hydroxyl groups on the surface;

[0035] (2) Add the aqueous solution of 2 parts of silane coupling agent KH-858 in the system, after stirring 2h at room temperature, obtain the silicon dioxide that contains double bond on the surface, the average particle diameter is 50nm,

[0036] (3) Under a nitrogen atmosphere, raise the temperature of the system to 70°C, add dropwise 25 parts of potassium persulfate initiator, 250 parts of styrene and 50 parts of vinyl monomer containing Anthracene fluorescent group, and react at a constant temperature of 70°C for 12 hours , filtered and purified to obtain a product with an average ...

Embodiment 3

[0043] A preparation method of polyurethane-titanium dioxide nano fluorescent particles grafted with rhodamine B (Rhodamine B) fluorescent functional groups (λmax (ex): 350nm; λmax (em): 550nm), has the following steps:

[0044] (1) Take 10 parts of nano-titanium dioxide by mass ratio, add 10 parts of water, and stir at a high speed through an emulsifier to obtain a translucent light blue nano-silica dispersion with hydroxyl groups on the surface;

[0045] (2) Add 2 parts of KH-550 silane coupling agent to the system, continue to stir for 2 hours, then raise the temperature to 85° C. and reflux and stir for 3 hours to obtain nano-silica containing amino groups on the surface, with an average particle size of 50 nm, ready for use;

[0046] (3) First, 400 parts of diisocyanate (IPDI), 600 parts of macromolecular diol (PTMG), 2 parts of carboxyl small molecule diol (DMPA), 1 part of trimethylolpropane (TMP), Add 4 parts of Rhodamine B and 50 parts of acetone into the reaction ves...

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Abstract

The invention relates to the technical field of photovoltaic and particularly relates to a fluorescent nanoparticle as well as a preparation method and application thereof. The particle size of the fluorescent nanoparticle is 20-200nm and specifically comprises a nanoparticle and a transparent polymer chain with a fluorescent functional group. The invention provides an effective material and a mode which can be used for converting sunlight into an effective response area of a solar battery. According to the effectively material and the mode, sunlight with low photoelectric response degree or no response degree in the solar battery can be converted and the problems of difficult dispersibility in a residuite and easy mobility of a traditional fluorescent substance are effectively solved. Therefore, the photoelectric conversion efficiency of the solar battery is increased and the power generation cost of a solar photovoltaic system is reduced.

Description

technical field [0001] The invention relates to the field of photovoltaic technology, in particular to a nano fluorescent particle and its preparation method and application. Background technique [0002] The low photoelectric conversion efficiency of solar cells and the high cost of power generation are the two main factors restricting the widespread application of solar photovoltaic systems. Basically unresponsive. For example, sunlight with a spectral range of 280-2500nm has the best responsivity to traditional crystalline silicon solar cells in the spectral range of 600-980nm, and the responsivity of sunlight in other spectral ranges is low or basically non-responsive. large energy loss. In order to improve the photoelectric conversion efficiency of solar cells, currently the main method is to optimize the solar cells themselves, but this solution is usually restricted by technical conditions and costs. [0003] So far, people in the industry have proposed a variety o...

Claims

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Application Information

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IPC IPC(8): C09K11/06H01L31/0232C08F292/00C08G18/08H01L31/055
CPCY02E10/52
Inventor 潘秀娟
Owner TRINASOLAR CO LTD
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