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Application of alcohol soluble fullerene derivative in perovskite solar cell

A technology of fullerene derivatives and solar cells, applied in the preparation of organic compounds, circuits, photovoltaic power generation, etc., can solve the problems of increasing device manufacturing costs, low voltage, affecting device efficiency, etc., and achieve improved photoelectric conversion efficiency, high Good battery performance and dispersibility

Active Publication Date: 2017-11-24
SUZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the influence of the energy level of PEDOT:PSS itself, the voltage of the p-i-n device is low and the efficiency is low; not only that, but the electron mobility of the p-i-n device is much lower than the hole mobility, which leads to the recombination of carriers and affects the device efficiency. , the current device efficiency is generally around 10%, so it is difficult to find its figure in high-efficiency devices
In order to solve this problem, scientists use metal oxides such as nickel oxide as the hole transport layer instead of PEDOT:PSS. However, since the preparation of metal oxides mostly requires high-temperature sintering, it is not suitable for the preparation of flexible devices and will increase the cost of device preparation.

Method used

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  • Application of alcohol soluble fullerene derivative in perovskite solar cell
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  • Application of alcohol soluble fullerene derivative in perovskite solar cell

Examples

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Embodiment 1

[0059] A preparation method of alcohol-soluble fullerene derivatives specifically includes the following steps:

[0060] (1) Under alkaline conditions, react triethylene glycol monomethyl ether with p-toluenesulfonyl chloride to obtain 2-(2-methoxyethoxy)ethoxyethyl p-toluenesulfonic acid;

[0061] (2) In a polar solvent, 2-(2-methoxyethoxy)ethoxyethyl p-toluenesulfonic acid reacts with methyl 3,4,5-trihydroxybenzoate to obtain 3,4,5- Methyl tris((2-(2-methoxyethoxy)ethoxy)ethoxy)benzoate;

[0062] (3) 3,4,5-tris(2-(2-methoxyethoxy)ethoxy)ethoxy benzoic acid methyl ester is reduced by LiAlH4 under ice bath conditions to obtain 3,4,5-tris ((2-(2-Methoxyethoxy)ethoxy)ethoxy)benzol;

[0063] (4) Using N,N-lutidine (DMAP), p-toluenesulfonic acid (PTSA), and N,N-diisopropylamide (DIPC) as catalysts, 3,4,5-tris(2-( 2-Methoxyethoxy)ethoxy)ethoxybenzol and [6,6]-C 60 -Phenylbutyric acid (PCBA), the esterification reaction takes place to obtain the final product, which is [6,6]-C61-phenylbut...

Embodiment 2

[0068] A method for preparing a perovskite solar cell includes the following steps:

[0069] 1) First prepare PbI 2 DMF solution and MAI isopropanol solution doped with 0.1% alcohol-soluble fullerene derivative PCBB-6C-EG;

[0070] 2) Spin-coating a hole transport layer on clean conductive glass;

[0071] 3) Use solution spin coating processing method to prepare PbI 2 The solution is spin-coated on the dried hole transport layer, and then on the dried PbI 2 Spin-coating the MAI isopropanol solution doped with alcohol-soluble fullerene derivatives on the film;

[0072] 4) Anneal the obtained flat film on a hot stage at 135℃ to obtain perovskite crystals; used for SEM test; see image 3 Shown is the SEM morphology of the perovskite surface prepared after doping with 0.1% alcohol-soluble fullerene derivatives. It can be seen from the figure that the doped perovskite grains are relatively uniform and dense, and the A relatively large crystal grain can be formed, and a relatively high devi...

Embodiment 3

[0074] The conductive glass is sonicated with deionized water, acetone, and isopropanol, and the ultrasonic glass is placed in an oven to dry; then a layer of hole transport layer is spin-coated; a two-step method is used on the hole transport layer. The perovskite active layer is prepared by annealing at 135°C, and the obtained film can be used for XRD testing.

[0075] See Figure 4 Shown are the XRD curves of PCBB-6C-EG doped with 0%, 0.01%, 0.1% and 1%. It can be seen from the figure that with the incorporation of PCBB-6C-EG, the resulting XRD There is a significant increase in the peak intensity, which shows that PCBB-6C-EG can assist the growth of perovskite crystals and help to grow larger grains, which is also consistent with the SEM surface topography.

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Abstract

The invention discloses an application of an alcohol soluble fullerene derivative in a perovskite solar cell. The preparation process of a cell includes the following steps: preparing a cavity transmission layer on a piece of clean electro-conductive glass; spin-coating the cavity transmission layer with DMF solution of PbI2, spin-coating methyl ammonium iodide (MAI) isopropanol solution doped with the alcohol soluble fullerene derivative, and then obtaining a perovskite layer through annealing; and preparing an electronic modification layer and electrodes on the perovskite layer, and obtaining a perovskite solar cell. The application of an alcohol soluble fullerene derivative in a perovskite solar cell enables the fullerene to be distributed in a perovskite film from top to bottom in a graded manner by means of a simple doping method, thus maximally improving the electron mobility so as to improve the current and fill factors of devices. Therefore, the application of an alcohol soluble fullerene derivative in a perovskite solar cell can obtain a perovskite solar cell with high performance and simplify the process of device preparation, and can obtain better device performance at the same time.

Description

Technical field [0001] The invention belongs to the field of photovoltaic materials, and specifically relates to the application of an alcohol-soluble fullerene derivative in a perovskite solar cell, which can obtain a perovskite solar cell with a fullerene gradient distribution. Background technique [0002] Solar energy is an inexhaustible and inexhaustible renewable green energy, and how to effectively develop and utilize solar energy has become a hot spot in scientific research. In 2009, Miyasaka et al. used organometallic trihalide perovskite as the sensitizer in the liquid electrolyte in the dye-sensitized cell, and its conversion efficiency was 3.8%. This is the perovskite solar cell (Pero-SC) Born, it opened up the application of perovskite batteries in the field of optoelectronics. Two years later, through optimization of TiO 2 The thin film layer and the process of depositing the perovskite thin film layer make the conversion efficiency of the perovskite solar cell rea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/46H01L51/42H01L51/48C07C69/612C07C309/42C07C303/22C07C67/08
CPCC07C67/08C07C69/612C07C303/22C07C309/42C07B2200/11H10K71/12H10K85/215H10K30/40Y02E10/549Y02P70/50
Inventor 李耀文许桂英李永舫
Owner SUZHOU UNIV
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