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Novel plasmon strengthened upconverter for solar cell and preparation of novel plasmon strengthened upconverter

A technology of plasmonics and solar cells, applied in the field of solar cells, to achieve the effect of enhancing spectral upconversion quantum efficiency and improving cell efficiency

Inactive Publication Date: 2014-07-09
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of the band gap of the solar cell material, the solar cell can only absorb the visible part of the solar spectrum.

Method used

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  • Novel plasmon strengthened upconverter for solar cell and preparation of novel plasmon strengthened upconverter
  • Novel plasmon strengthened upconverter for solar cell and preparation of novel plasmon strengthened upconverter
  • Novel plasmon strengthened upconverter for solar cell and preparation of novel plasmon strengthened upconverter

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Effect test

Embodiment 1

[0032] First, a metal Ag thin film with a thickness of about 20 nm was deposited on the glass substrate by vacuum evaporation technology; secondly, the core / shell structure of PbS / NaYF 4 : 18%Yb 3+ ,2%Er 3+ The luminescent material is coated on the surface of the Ag film to form a thin film of 0.25mm; then it is annealed by heating to 250°C in a nitrogen atmosphere. Utilizing the surface tension aggregation of the metal Ag film, the metal film forms a spherical metal nanoparticle array with a diameter of about 50-100nm, and some smaller-sized metal particles are attached to the surface of the up-conversion material through diffusion. Due to the local surface plasmon effect of the nano-metal particles, the up-conversion material can absorb more transmitted infrared light, thereby emitting stronger visible light and increasing the light absorption of the battery.

Embodiment 2

[0034] First, a core / shell structure of PbS / NaYF is coated on the surface of the glass substrate 4 : 18%Yb 3+ ,2%Er 3+ Luminescent material with a thickness of 0.25mm; then, a metal Ag film with a thickness of 20nm is deposited on the up-conversion material by vacuum evaporation technology; then heated to 250°C in a nitrogen atmosphere for annealing to obtain plasmon enhancement for solar cells up converter.

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Abstract

The invention belongs to the technical field of solar cells, and particularly relates to a novel plasmon strengthened upconverter with auxiliary quantum dots for a solar cell and a preparation method of the novel plasmon strengthened upconverter. Metal nano-particles and particles of upconversion materials are uniformly dispersed on a substrate to form the upconverter, the upconversion materials include a quantum dot material and an upconversion luminous material doped with rare earth ions, and the quantum dot material is semiconductor polymer with a narrow band gap. The quantum upconversion conversion efficiency of the upconversion luminous material is strengthened by the aid of a plasmon effect of the metal nano-particles and the characteristic of broad spectrum absorption of the quantum dots, accordingly, more visible light can be emitted, and efficiency of the cell is enhanced.

Description

technical field [0001] The invention belongs to the technical field of solar cells, in particular to a plasmon-enhanced up-converter for solar cells and its preparation. Background technique [0002] With the rapid development of society and economy, the human demand for energy is increasing day by day. Photovoltaic power generation will play an important part in the field of renewable energy in the future. At present, the biggest constraint factor for the further development of the photovoltaic industry is that its power generation cost is higher than that of conventional energy sources. Therefore, the development of high-efficiency, low-cost, and long-life solar cells has become a research hotspot all over the world. One of the ways to improve battery efficiency is how to further improve the full use of sunlight, which involves research on advanced light management design. [0003] One of the ways to achieve light-management design is to use light-trapping technology. I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/055H01L31/18
CPCY02E10/50Y02E10/52Y02P70/50
Inventor 陈永生焦岳超卢景霄
Owner ZHENGZHOU UNIV