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Efficient photovoltaic conversion material and photovoltaic power generation structure thereof

A photovoltaic and high-efficiency technology, applied in the field of perovskite photovoltaic conversion materials and solar cells, can solve problems affecting energy conversion efficiency, and achieve the effects of environmental protection, reducing usage, and improving thermal stability

Active Publication Date: 2020-04-28
京仪赛拉弗河北能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, at a temperature of 55°C, the perovskite structure phase represented by methylamine lead triiodide (MAPbI3) will undergo a transformation, and ion migration in the perovskite material will lead to material degradation, which will ultimately affect the energy conversion efficiency.
Therefore, the urgent problems to be solved are: how to improve the thermal stability of perovskite solar cells at high temperature; Device cost; how to avoid the degradation of perovskite solar cells caused by the reaction of perovskite with the back electrode material

Method used

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  • Efficient photovoltaic conversion material and photovoltaic power generation structure thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0032] The perovskite light-absorbing layer 5 is formed by a precursor solution of a high-efficiency photovoltaic conversion material. The preparation method of the precursor solution of the high-efficiency photovoltaic conversion material comprises the following sequential steps: (1) BX 2 and B'X 2 After mixing according to the molar ratio c: 1-c, add an appropriate amount of bis-nitrile 2,4,8,10-tetraoxaspiro[5.5]undecane for mixing to obtain a metal halide mixture; (2) Add AX Mix the metal halide mixture to form a raw material mixture; (3) add N,N-dimethylformamide (DMF), dimethylsulfoxide (DMSO) or γ-butyrolactone to the raw material mixture mixed with a solvent and heat-treated to obtain a precursor solution for high-efficiency photovoltaic conversion materials. Among them, A is CH 3 NH 3 + or NH 2 CH=NH 2 + , B is Pb 2+ , B' is Cu 2+ , Zn 2+ or Fe 2 + , X is Cl - 、Br - or I - , 02 and B'X 2 0.05~0.1 times the total molar weight of The molar amount of AX...

Embodiment 1

[0074] Weigh 11.1 g of PbCl 2 and 8.1 g CuCl 2 Put it into a ball mill and mix for 0.5h, then weigh 1.3g of 3,9-bis(3-cyanoethyl)-2,4,8,10-tetraoxaspiro[5.5]undecane, add it into a ball mill and mix for 1h, Then weigh 13.5 g of CH 3 NH 3 Cl was added into a ball mill and mixed for 1 h to obtain a raw material mixture. The raw material mixture was put into a magnetic stirrer, and stirred and reacted at 80° C. for 12 hours to obtain a precursor solution of a high-efficiency photovoltaic conversion material.

[0075] Select a commercially available substrate with a second electrode, which can be purchased from Japan Plate Glass and formed with fluorine-doped SnO 2 layer with a thickness of 1mm on a conductive glass substrate. Fluorine-doped SnO 2 A titanium oxide layer with a thickness of about 30 nm was formed as the electron transport layer 3 on the layer by sputtering. Next, high-purity titanium oxide powder having an average particle diameter of 20 nm was dispersed in ...

Embodiment 2

[0079] In addition to adding 8.1 g of CuCl 2 Replaced with 8.2 g ZnCl 2 Except, all the other are with embodiment 1.

[0080] The photovoltaic power generation structure obtained by the preparation method of this example has an open circuit voltage of 1.12V and a short circuit current of 20.17 mA cm under simulated sunlight. -2 , the fill factor is 0.71, and the photoelectric conversion efficiency is 13.2%. After 100 hours, the photoelectric conversion efficiency is 10.3%.

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Abstract

The invention discloses an efficient photovoltaic conversion material and a photovoltaic power generation structure thereof. The efficient photovoltaic conversion material is composed of a perovskitematerial subjected to modification treatment, the general formula of the perovskite material is ABcB'1-cX3, wherein A is CH3NH3+ or NH2CH = NH2+, B is Pb<2+>, B'is Cu<2+>, Zn <2+> or Fe < 2+>, X is Cl<->, Br<-> or I<->, c is larger than 0 and smaller than 0.5, and the modified perovskite material is modified by dinitrile 2,4,8,10-tetraoxaspiro [5.5] undecane. According to the invention, Cu<2+>, Zn<2+> or Fe <2+> doping and 3, 9-bis (3-cyanoethyl)-2, 4, 8, 10-tetraoxaspiro [5.5] undecane modification treatment are adopted at the same time, so that the thermal stability of a perovskite solar cell at a high temperature can be effectively improved.

Description

technical field [0001] The invention relates to a high-efficiency photovoltaic conversion material and a photovoltaic power generation structure thereof, in particular to a perovskite photovoltaic conversion material and a solar cell thereof. Background technique [0002] Energy is a necessity of modern life. When traditional fossil fuels are slowly exhausted and exhausted, human needs and desires for new and clean energy will become more intense. As a new, clean and abundant form of energy, solar energy is of great strategic significance to efficiently and stably utilize it, and efficient and stable photovoltaic conversion materials are the core to promote the development of solar energy. [0003] Perovskite is an organic-inorganic hybrid optoelectronic material, which has a large spectral absorption intensity and a wide spectral absorption range, and can efficiently absorb most of the energy in solar energy. It is used as a light-absorbing layer material in photovoltaic c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46
CPCH10K85/00H10K30/151H10K30/00Y02E10/549
Inventor 孟庆妍刘培良李志伟李雪梅曲阳
Owner 京仪赛拉弗河北能源科技有限公司