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Noble metal-rare earth nano composite system for modulating solar spectrum and preparation method of noble metal-rare earth nano composite system

A nanocomposite and solar spectrum technology, applied in the field of noble metal-rare earth nanocomposite system and its preparation, can solve the problem of the lack of noble metal nanoparticle-rare earth nanoparticle composite nanopowder system, weak luminous intensity of light conversion layer, low quantum efficiency, etc. problem, achieve the effect of improving the photoelectric conversion efficiency, the enhancement effect is remarkable, and the preparation process is simple

Pending Publication Date: 2019-11-05
FUJIAN NORMAL UNIV
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Problems solved by technology

However, traditional quantum tailoring materials have weak luminous intensity and low quantum efficiency as light conversion layers, making it difficult to put them into practical use.
[0003] At present, there is no report on the noble metal nanoparticles-rare earth nanoparticles composite nanopowder system for modulating the solar spectrum

Method used

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  • Noble metal-rare earth nano composite system for modulating solar spectrum and preparation method of noble metal-rare earth nano composite system
  • Noble metal-rare earth nano composite system for modulating solar spectrum and preparation method of noble metal-rare earth nano composite system
  • Noble metal-rare earth nano composite system for modulating solar spectrum and preparation method of noble metal-rare earth nano composite system

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Embodiment Construction

[0040] A method for preparing a noble metal-rare earth nanocomposite system for modulating the solar spectrum, comprising the steps of:

[0041] A. Preparation of NaYF in powder system 4 :Er 3+ nanoparticles

[0042] ① Weigh YCl according to the molar ratio (total 2 mmol) 3 ·6H 2 O, ErCl 3 ·6H 2 O, and add 12 mL of oleic acid and 30 mL of 1-octadecene, vacuumize and heat the mixed solution, when the temperature reaches 130 °C, maintain the temperature for 40 min, and then naturally cool down to room temperature;

[0043] ② Weigh 0.2000 g NaOH and 0.2963 g NH 4 F, make it completely dissolved in 20mL of methanol, add the methanol solution dropwise to the mixed solution in step ①, stir at room temperature for 40 min to obtain an emulsified mixed solution, and then slowly pass argon into the three-neck round bottom flask At the same time, heat the emulsified mixture to 62 °C to volatilize methanol. When the temperature of the emulsified mixture reaches 110 °C, heat it to 3...

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Abstract

The invention discloses a noble metal-rare earth nano composite system for modulating solar spectrum and a preparation method of the noble metal-rare earth nano composite system. The chemical constitution of the nano composite system is Au NRs-NaYF4: Er3+, the effective excitation wavelength of the nano composite system is 486 nm, and the emission peak is 980 nm. When the length-diameter ratio ofAu NRs is 6 and the doping concentration of Au NRs is 0.225%, the luminescence enhancement effect of quantum cutting of the nano composite system is the most significant, and the maximum enhancement factor is 2.47. The invention provides a noble metal nanoparticle-rare earth nanoparticle nano composite system for modulating the solar spectrum for the first time. The noble metal nanoparticle-rare earth nanoparticle nano composite system for modulating the solar spectrum is simple in preparation process, low in cost and high in efficiency. The nano composite system is made into a light conversion layer and is placed on a solar cell, so that visible light which is absorbed by the solar cell at low efficiency in sunlight can be converted into a near infrared spectrum which can be efficiently absorbed by the solar cell, and the photoelectric conversion efficiency of the solar cell is effectively improved.

Description

technical field [0001] The invention relates to the technical field of composite nanomaterials, in particular to a noble metal-rare earth nanocomposite system for modulating solar spectrum and a preparation method thereof. Background technique [0002] Quantum tailoring refers to the luminescence phenomenon in which one high-energy photon is absorbed and two or more low-energy photons are emitted. The light conversion layer made of quantum tailoring material is placed on the solar cell, which can convert the ultraviolet light and part of the visible light that are inefficiently absorbed by the solar cell in sunlight into the near-infrared spectrum that can be efficiently absorbed by the solar cell, effectively improving the efficiency of the solar cell. Photoelectric conversion efficiency, theoretically, the photoelectric conversion efficiency can be increased from 18% to 38.6%. However, traditional quantum tailoring materials have weak luminous intensity and low quantum ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85H01L31/055B22F1/00B22F9/24
CPCC09K11/7773H01L31/055B22F9/24B22F1/07B22F1/054Y02E10/52
Inventor 黄莉莉郑志强林林冯卓宏王哲哲
Owner FUJIAN NORMAL UNIV
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