Light trapping structure of high-efficiency solar battery and manufacturing method thereof

A technology of solar cells and solar cells, applied in circuits, electrical components, photovoltaic power generation, etc., can solve problems such as inability to achieve light trapping effects, lack of light field and photogenerated carrier management, and achieve improved quantum efficiency and efficiency The effect of improvement and cost reduction

Inactive Publication Date: 2012-06-27
BOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the light trapping structure itself does not have the management function of light field and photogenerated carriers, so it cannot achieve the optimal light trapping effect.

Method used

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  • Light trapping structure of high-efficiency solar battery and manufacturing method thereof
  • Light trapping structure of high-efficiency solar battery and manufacturing method thereof
  • Light trapping structure of high-efficiency solar battery and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Such as figure 1 , figure 2 , image 3 and Figure 5 As shown, the high-efficiency solar cell light trapping structure includes a solar cell diffusion sheet 3, an annular two-dimensional photonic crystal 4 is arranged on the solar cell diffusion sheet 3, and a two-dimensional photonic crystal full reflection mirror is formed through the complete band gap of the two-dimensional photonic crystal. Utilize the two-dimensional photonic crystal total reflection mirror to divide a plurality of micro-regions 301 on the solar cell diffusion sheet 3, and the diameter of the micro-regions 301 is 1 time of the minority carrier diffusion length of the solar cell diffusion sheet 3. Each micro-region 301 is in the form of a triangular lattice array, and buried gate electrodes (that is, upper electrode 5 and lower electrode 2 ) are provided at the edges of the corresponding micro-regions 301 on the front and back of the substrate 3, and are realized through the upper electrode 5 and...

Embodiment 2

[0049] Such as figure 1 , figure 2 , image 3 and Figure 5 As shown, the high-efficiency solar cell light trapping structure includes a solar cell diffusion sheet 3, an annular two-dimensional photonic crystal 4 is arranged on the solar cell diffusion sheet 3, and a two-dimensional photonic crystal full reflection mirror is formed through the complete band gap of the two-dimensional photonic crystal. A two-dimensional photonic crystal total reflection mirror is used to divide a plurality of micro-regions 301 on the solar cell diffusion sheet 3, the plurality of micro-regions 301 are in the form of a triangular lattice array, and the diameter of the micro-regions 301 is twice the minority carrier diffusion length of the solar cell diffusion sheet 3 , in this example, the micro-area 301 has a diameter of 500 mm, and a buried gate electrode (that is, an upper electrode 5 and a lower electrode 2) is provided on the front and back sides of the substrate 3 corresponding to the e...

Embodiment 3

[0058] Such as figure 1 , figure 2 , image 3 and Figure 5 As shown, the high-efficiency solar cell light trapping structure includes a solar cell diffusion sheet 3, an annular two-dimensional photonic crystal 4 is arranged on the solar cell diffusion sheet 3, and a two-dimensional photonic crystal full reflection mirror is formed through the complete band gap of the two-dimensional photonic crystal. A two-dimensional photonic crystal total reflection mirror is used to divide a plurality of micro-regions 301 on the solar cell diffusion sheet 3, the plurality of micro-regions 301 are in the form of a triangular lattice array, and the diameter of the micro-regions 301 is 1.5 times the minority carrier diffusion length of the solar cell diffusion sheet 3 , in this example, the diameter of the micro-region 301 is 300 mm, and a buried gate electrode (ie, the upper electrode 5 and the lower electrode 2) is provided on the front and back of the substrate 3 corresponding to the ed...

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Abstract

The invention discloses a light trapping structure of a high-efficiency solar battery and a manufacturing method thereof. The structure comprises a solar battery diffuser film, wherein a plurality of cylindrical two-dimensional photonic crystals are arranged on the solar battery diffuser film; the solar battery diffuser film is divided into a plurality of microcells through the cylindrical two-dimensional photonic crystals; buried gate electrodes are arranged on the edges near the microcells on the solar battery diffuser film, and interconnection among internal electrodes is realized through the buried gate electrodes; micro permeable mirrors are arranged on the divided microcells; the micro permeable mirrors form an array structure; a one-dimensional photonic crystal omnidirectional reflecting mirror is arranged on the back side of the solar battery diffuser film; and each micro permeable mirror is provided with a reflection film. By the structure and the method, the photoelectric conversion efficiency of an incidence light field inside a battery can be improved, an effective light trapping effect is achieved, the light field and excited photo-generated carriers are effectively controlled and managed at the same time, and an extremely favorable condition is provided for sufficient utilization of the incidence light field and efficient collection of the photo-generated carriers, so that the photoelectric conversion efficiency of the battery can be maximized.

Description

technical field [0001] The invention relates to a high-efficiency solar cell light-trapping structure and a manufacturing method thereof. Background technique [0002] Solar cells are the most important form of solar energy utilization, and because solar energy has the characteristics of abundant reserves, cleanness, and wide coverage, solar cells are also considered to be the most potential form of new energy. At present, various forms of solar cells have been developed, and some of them have been industrialized, but most of them are still in the stage of laboratory development. From the current research direction of various solar cells, the photoelectric conversion efficiency is still the most important issue in this field, because it is the main factor determining the cost of the battery and the key parameter for the competition between various batteries, so it has always been It is one of the most important research contents of solar cells. [0003] At present, a varie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/052H01L31/0216H01L31/18
CPCY02E10/52Y02E10/50Y02P70/50
Inventor 陆晓东伦淑娴于忠党王巍迟峰
Owner BOHAI UNIV
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