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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 improving cell efficiency and enhancing spectral upconversion quantum efficiency

Inactive Publication Date: 2012-07-25
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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Embodiment 1

[0032] First, use vacuum evaporation technology to deposit a metal Ag film on a glass substrate with a thickness of about 20nm; secondly, use 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 0.25mm thin film; then it is heated to 250°C for annealing in a nitrogen atmosphere. Utilizing the aggregation of the surface tension of the metal Ag film, the metal film forms an array of spherical metal nanoparticles with a diameter of about 50-100 nm. Some metal particles of smaller size are attached to the surface of the upconversion material through diffusion. Due to the localized 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, coat a layer of PbS / NaYF with a core / shell structure on the surface of the glass substrate 4 : 18%Yb 3+ ,2%Er 3+ Luminescent material with a thickness of 0.25mm; subsequently, a metal Ag film with a thickness of 20nm is deposited on the up-conversion material using vacuum evaporation technology; then it is heated to 250°C in a nitrogen atmosphere for annealing to obtain a new type of plasmon for solar cells Enhanced 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, and particularly relates to a novel plasmon-enhanced upconverter for solar cells and preparation thereof. Background technique [0002] With the rapid development of society and economy, human demand for energy is increasing. Photovoltaic power generation will occupy an important part of the future renewable energy field. At present, the biggest constraint to the further development of the photovoltaic industry is that the cost of power generation 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 focus in countries around the world. One of the ways to improve battery efficiency is how to further improve the full use of sunlight, which involves the research of advanced light management design. [0003] One of the methods to realize the light management design is to adopt light trap-trap techno...

Claims

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Application Information

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