Silicon solar thin-film cell based on double-layer micro-nano two-dimensional multi-tooth resonant grating

A technology of solar thin film and grating, applied in the field of optics

Active Publication Date: 2017-06-13
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, an important problem plaguing solar thin film batteries at present is their photoelectric conversion performance.

Method used

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  • Silicon solar thin-film cell based on double-layer micro-nano two-dimensional multi-tooth resonant grating
  • Silicon solar thin-film cell based on double-layer micro-nano two-dimensional multi-tooth resonant grating
  • Silicon solar thin-film cell based on double-layer micro-nano two-dimensional multi-tooth resonant grating

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Embodiment Construction

[0031] Describe in detail below in conjunction with accompanying drawing:

[0032] 1. Overall

[0033] Such as figure 1 As shown, the upper and lower surfaces of the silicon active layer of the solar thin film cell are provided with a micro-nano two-dimensional multi-tooth resonant grating that changes periodically along the X and Y axes, and there are two grating teeth of silicon material in each period, and two A material is a grating groove of air, and the thickness of the grating layer is along the Z-axis direction.

[0034] 2. Micro-nano two-dimensional multi-tooth resonant grating on the upper surface of the silicon active layer:

[0035]The grating period along the X axis is 1200 nm (T x1 =1200nm), there are two grating teeth of silicon material in each period, and their widths are respectively, wx 11 = 130 nm, wx 12 =54 nanometers; and two grating grooves made of air, whose widths are respectively, kx 11 =306 nm, kx 12 =710nm;

[0036] The grating period along ...

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Abstract

The invention discloses a silicon solar thin-film cell based on a double-layer micro-nano two-dimensional multi-tooth resonant grating. Both the upper and lower surfaces of the active layer of the silicon solar thin-film cell are provided with micro-nano two-dimensional multi-tooth resonant gratings varying periodically in two directions. Two silicon-material grating teeth and two air-material grating trenches are arranged in each cycle. It is indicated by theoretical analysis that by controlling the structural size, the grating tooth position and the grating thickness of the micro-nano two-dimensional multi-tooth resonant gratings on the upper and lower surfaces of the silicon active layer, the silicon solar thin-film cell can achieve incident light absorption efficiency more than 81.8%, thereby significantly improving the interaction between the silicon active layer and sunlight so as to improve the photoelectric converting efficiency of silicon solar thin-film cell.

Description

technical field [0001] The invention belongs to the field of optics, in particular to a silicon solar thin film battery based on a double-layer micro-nano two-dimensional multi-tooth resonant grating. Background technique [0002] Thin-film solar cells have attracted much attention from researchers because of their relatively simple manufacturing process, low energy consumption, and small size. However, an important problem plaguing solar thin-film cells at present is their photoelectric conversion performance. Studies have shown that by improving the surface structure of solar thin-film batteries, their ability to capture and absorb sunlight can be improved, allowing more photons to participate in the photoelectric conversion process, thereby improving the photoelectric conversion performance of solar thin-film batteries. Among them, due to the advantages of simple structure, easy integration, and simple manufacturing process, the grating is often placed on the surface of ...

Claims

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Application Information

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IPC IPC(8): H01L31/054G02B5/18
CPCG02B5/18H01L31/0543Y02E10/52
Inventor 吴华明肖文波马林飞徐欢欢刘宪爽
Owner NANCHANG HANGKONG UNIVERSITY
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