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Perovskite solar cell with mixed light trapping structure and preparation method thereof

A technology of solar cells and light-trapping structures, applied in photovoltaic power generation, circuits, electrical components, etc., can solve problems affecting the photoelectric conversion efficiency of solar cells, achieve the effects of improving conversion efficiency, improving light absorption, and increasing photocurrent

Inactive Publication Date: 2018-01-16
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the reflection and transmission of light, most of the light cannot be absorbed by the light-absorbing layer of the solar cell, thus affecting the photoelectric conversion efficiency of the solar cell

Method used

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  • Perovskite solar cell with mixed light trapping structure and preparation method thereof
  • Perovskite solar cell with mixed light trapping structure and preparation method thereof
  • Perovskite solar cell with mixed light trapping structure and preparation method thereof

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Embodiment

[0030] A perovskite solar cell with a hybrid light-trapping structure, from bottom to top: glass substrate, FTO, micro-nano TiO 2 Particle light trapping layer, electron transport layer TiO 2, Perovskite light absorbing layer, hole transport layer Spiro-MeOTAD, nano Ag grating and silver electrode.

[0031] The preparation method of the perovskite solar cell with the above-mentioned hybrid light-trapping structure specifically comprises the following steps:

[0032] Step 1, select the glass substrate with FTO on the surface, that is, the FTO conductive glass, as the substrate and conductive electrode of the solar cell, ultrasonically clean it in ethanol and deionized water, and dry it for later use;

[0033] Step 2. TiO 2 Preparation of nanoparticles:

[0034] 2.1 Add heptanoic acid and titanate to absolute ethanol in sequence, and stir at 30°C for 1.5 hours to obtain a mixture A; wherein, the volume ratio of heptanoic acid, titanate and absolute ethanol is 1:5:100;

[003...

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Abstract

The invention relates to a perovskite solar cell with a mixed light trapping structure and a preparation method thereof, and belongs to the technical field of perovskite solar cells. The perovskite solar cell comprises a substrate, a conductive electrode, a micro-nano particle light trapping layer, an electron transport layer, a perovskite light absorbing layer, a hole transport layer, a nano Ag optical grating and a metal electrode, wherein the conductive electrode, the micro-nano particle light trapping layer, the electron transport layer, the perovskite light absorbing layer, the hole transport layer, the nano Ag optical grating and the metal electrode are sequentially formed on the substrate, and the micro-nano particle light trapping layer is TiO2 micro-nano particles. The micro-nanostructure is introduced into the perovskite solar cell with the mixed light trapping structure, so that the light trapping capacity of the solar cell can be significantly improved, and the light absorption of the solar cell is enhanced through increasing scattering of the incident light and prolonging the light path of the incident light in the solar cell, so that the light current of the cell isincreased, and the conversion efficiency of the solar cell is effectively improved. Meanwhile, the nano Ag optical grating is introduced to a back electrode of the solar cell, so that a back reflection effect for the transmission light can be effectively increased by combining back reflection of a silver electrode, and thus the absorption of the cell for the incident light is further enhanced.

Description

technical field [0001] The invention relates to the field of perovskite solar cells, in particular to a perovskite solar cell with a mixed light-trapping structure and a preparation method thereof. Background technique [0002] Photovoltaic solar cells are one of the fastest-growing clean energy sources, and their main representatives are crystalline silicon solar cells and thin-film solar cells. Due to the reflection and transmission of light, most of the light cannot be absorbed by the light-absorbing layer of the solar cell, thereby affecting the photoelectric conversion efficiency of the solar cell. In order to solve this problem, a large number of technologies have been developed to reduce the reflection and transmission of light by solar cells. For crystalline silicon cells, the light-trapping layer is mainly formed by preparing a pyramid structure (single crystal) or a rough structure (polycrystalline) on the surface to achieve multiple scattering of light and reduce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/48B82Y20/00
CPCY02E10/549
Inventor 向勇兰洵
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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