Donor material based on fluorooxindole-containing compound as well as preparation method and device of donor material

A technology of indole oxide and donor, which is applied in the field of solar cell materials, can solve the problems of low batch repeatability of high-efficiency devices, low tolerance of film thickness variation, high difficulty in precise shape control, etc., and achieve good application value, The effect of definite structure and easy purification

Active Publication Date: 2018-08-10
南京烯勒光电科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Nevertheless, tedious device optimization processes (such as additives, thermal annealing, or solvent annealing, etc.) have resulted in extremely low batch-to-batch repeatability of high-efficiency devices due to the extreme difficulty in precisely controlling the morphology.
In addition, the active layer of the current device is made thinner, and the tolerance of film thickness variation is very low. Generally, it is necessary to precisely control its thickness below 100nm to achieve high conversion efficiency, which greatly limits the process of device preparation. The application of "roll-to-roll" or inkjet printing technology, and the preparation of new donor materials are crucial to the improvement of the above phenomena

Method used

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  • Donor material based on fluorooxindole-containing compound as well as preparation method and device of donor material
  • Donor material based on fluorooxindole-containing compound as well as preparation method and device of donor material
  • Donor material based on fluorooxindole-containing compound as well as preparation method and device of donor material

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Embodiment 1

[0031]An organic photoelectric compound, composed of a large organic conjugated unit system and an alkane or alkane-like structure, is a dark green solid powder with metallic luster. The general chemical structure of the compound is as follows:

[0032]

[0033] where: R 1 is ethyl, R 2 and R 3 is a fluorine atom, R 4 and R 5 is n-octyl, R 6 Be 2-ethylhexyl, that is, the chemical structural formula of this compound is:

[0034]

[0035] The preparation method of the organic photoelectric compound used in solar cells is prepared by performing a Knoevenagel condensation reaction on a dialdehyde group-terminated compound and a fluorine-containing oxindole-terminated precursor compound, including The following steps:

[0036] 1) Under argon protection, 3.85g (6.63mmol) of 5",-bromo-3,3',-dioctyl-[2,2':5',2"-tetrathiophene]-5-aldehyde Mix with 3.00 g (3.32 mmol) of thienyl-substituted benzodithiophene di-stanny monomer, 60 mL of dry N-N'-dimethylformamide and 0.20 g (0...

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Abstract

The invention discloses a donor material based on a fluorooxindole-containing compound. The donor material has a chemical structure general formula shown in the description. The organic photoelectricmaterial provided by the invention has simple synthetic steps and a determined structure, and is easy to purify; and an organic photovoltaic device prepared by the organic donor material provided by the invention does not need tedious post-treatment, a thick-film device with higher photoelectric conversion efficiency can be obtained only through simple solution spin coating, a thickness of an active layer can be changed in the range of 120-230nm, the photoelectric conversion efficiency can be maintained at 5.3%-7.8%, a highest photoelectric conversion rate can reach 7.80%, and the donor material has potentiality of ''roll-to-roll'' preparation or printing preparation of a large-area photovoltaic device and good application value.

Description

technical field [0001] The application relates to the field of solar cell materials, in particular to a fluorine-containing indole-based donor material and its preparation method and device. Background technique [0002] Solar energy is currently one of the safest, greenest, and most environmentally friendly ideal alternative energy sources, and solar photovoltaic technology is also one of the important ways to solve the current fossil energy crisis. Compared with traditional inorganic silicon-based solar cells, organic solar cells have the advantages of light weight, low cost, solution processing, high mechanical flexibility, and can be made into large-area flexible devices. develop. Nevertheless, tedious device optimization processes (such as additives, thermal annealing, or solvent annealing, etc.) have resulted in extremely low batch-to-batch repeatability of high-efficiency devices due to the extreme difficulty in precisely controlling the morphology. In addition, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D495/04H01L51/46
CPCC07D495/04H10K85/655H10K85/6576H10K85/6572Y02E10/549
Inventor 李公强杨宇婷王楷郭霄
Owner 南京烯勒光电科技有限公司
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