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Micro-nano mixed structure for enhancing light absorption of solar cell and preparation method of micro-nano mixed structure

A solar cell and micro-nano hybrid technology, which is applied in the fields of micro-nano processing and surface light trapping technology, can solve the problems of complicated process, limited application and promotion of the micro-nano hybrid structure, etc.

Pending Publication Date: 2021-08-24
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The micro-nano hybrid structures prepared above have improved the conversion efficiency of the battery to varying degrees, but the process is relatively complicated and can only be applied to silicon solar cells, which limits the application and promotion of the micro-nano hybrid structure.

Method used

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  • Micro-nano mixed structure for enhancing light absorption of solar cell and preparation method of micro-nano mixed structure
  • Micro-nano mixed structure for enhancing light absorption of solar cell and preparation method of micro-nano mixed structure
  • Micro-nano mixed structure for enhancing light absorption of solar cell and preparation method of micro-nano mixed structure

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with specific examples.

[0021] figure 2 An example of PDMS thin film with surface micro-nano hybrid structure is given. The specific implementation steps are as follows: firstly, a pyramidal silicon chip with a diameter of 3 inches, a crystal orientation (100), and a thickness of about 500 μm is placed on a glass substrate, and the silicon chip is cleaned with acetone, alcohol and deionized water. Soak the silicon wafer in a HF solution with a volume fraction of 2% for 2 minutes to remove SiO on the surface 2 ; Second, put the soaked silicon wafer into 0.035mol / L AgNO 3 In the mixed solution (30 degrees) of the solution and 15vol% HF solution, the silver film (particle) is deposited, and taken out horizontally after 2 minutes. Put the silicon wafer with deposited silver film horizontally into 10vol% HF and 0.6vol% H 2 o 2 In the mixed solution, keep the temperature at 35 degrees, react for 10-3...

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Abstract

The invention provides a micro-nano mixed structure for enhancing light absorption of a solar cell and a preparation method. The preparation method is characterized in that the method comprises the following steps: preparing a pyramid-structure silicon wafer (a) into a micro-nano mixed structure (black silicon (b) for short) through a chemical corrosion method, then pouring PDMS glue on the structural surface of the black silicon (b) serving as a template to obtain a mixed structural body (c) of the black silicon and the PDMS glue, and finally obtaining the PDMS film (d) with the micro-nano mixed structure on the surface through a demolding process. The surface light trapping structure can be used for silicon thin film solar cells or other glass packaging surface optoelectronic devices, is an efficient surface light trapping structure, and can remarkably reduce the light reflectivity of the surfaces of the glass devices and improve the photoelectric conversion efficiency of the devices.

Description

[0001] (1) Technical field [0002] The invention relates to a micro-nano hybrid structure and a preparation method for enhancing light absorption of solar cells, belonging to the field of optoelectronic devices, and specifically relates to surface light trapping technology and micro-nano processing. [0003] (2) Background technology [0004] At present, the surface of most solar cells is a planar structure. When light hits the surface of the cell, a large part of the incident light is reflected, resulting in a large amount of light energy loss on the surface of the cell. The surface light trapping structure can effectively reduce the reflection of light energy on the surface of the battery, enhance the light absorption of the solar cell, reduce the escape of light energy inside the battery, and extend the optical path to a certain extent, thereby improving the conversion efficiency of the battery. The micro-nano hybrid structure usually refers to the existence of nanostructur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0236H01L31/0445H01L31/18
CPCH01L31/02363H01L31/0445H01L31/1804Y02P70/50Y02E10/547
Inventor 陈乐方博闻罗炜孙嘉伟
Owner GUILIN UNIV OF ELECTRONIC TECH
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