Preparation method of organic/inorganic hybrid electron transport layer with porous structure

An electron transport layer and organic technology, applied in the manufacture/processing of organic semiconductor devices, organic semiconductor devices, semiconductor/solid-state device manufacturing, etc., can solve the problems of unfavorable commercial application of organic solar cells and restrictions on wide application, and achieve improvement Effects of charge extraction efficiency, multiple charge transport channels, and increased ohmic contact area

Pending Publication Date: 2022-01-25
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because PEI and PEIE are insulators and do not conduct electricity, there is a fatal shortcoming in the application of organic solar cells. The thickness of PEI and PEIE layers should be kept at 2-5nm. The preparation requirements of this ultra-thin film limit its application. Widespread use in devices and detrimental to the commercial application of organic solar cells in the future

Method used

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  • Preparation method of organic/inorganic hybrid electron transport layer with porous structure
  • Preparation method of organic/inorganic hybrid electron transport layer with porous structure
  • Preparation method of organic/inorganic hybrid electron transport layer with porous structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Step 1, dissolving zinc acetate dihydrate (2g) in 10mL of 2-methoxyethanol, and adding 0.28mL of ethanolamine to aid dissolution, fully stirring, and preparing a clear and transparent zinc oxide precursor solution;

[0023] Step 2, dilute the 35wt% PEIE aqueous solution to 0.5% with 2-methoxyethanol, and use the mixed solution of the zinc oxide precursor obtained in step 1 as the electron transport layer solution;

[0024] Step 3: Spin coating with a homogenizer, the spin coating substrate is ITO, the spin coating speed is 5000rpm, and the spin coating time is 30s. After the end, perform thermal annealing at 150°C for 40 minutes;

[0025] Step 4, after annealing, cool to room temperature, and spin-coat with 2-methoxyethanol to clean at a speed of 3000rpm, and spin-coat for 30s;

[0026] Step 5, move the substrate prepared with the electron transport layer into the glove box to spin-coat the active layer PBDB-T / DTPPSe-2F, PM6 / Y6, PTB7-Th / PC 71 BM, finally evaporated MoO...

Embodiment 2

[0034] Step 1, dissolving zinc acetate dihydrate (2g) in 10mL of 2-methoxyethanol, and adding 0.28mL ethanolamine to aid in dissolution, stirring thoroughly, and preparing a clear and transparent zinc oxide precursor solution;

[0035] Step 2, dilute the high-concentration PEIE aqueous solution to 0.5% with 2-methoxyethanol, and use the mixed solution of the zinc oxide precursor obtained in step 1 as the electron transport layer solution;

[0036] Step 3: Spin coating with a homogenizer, the spin coating substrate is ITO, the spin coating speed is 5000rpm, and the spin coating time is 30s. After the end, perform thermal annealing at 150°C for 40 minutes;

[0037] Step 4, after annealing, cool to room temperature, and spin-coat with 2-methoxyethanol to clean at a speed of 3000rpm, and spin-coat for 30s;

[0038] Step 5, move the substrate prepared with the electron transport layer into an indoor fume hood to spin-coat the active layer PBDB-T / DTPPSe-2F, and finally evaporate MoO...

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Abstract

The invention discloses a preparation method of an organic / inorganic hybrid electron transport layer with a porous structure. The method comprises the following steps: preparing a sol-gel method zinc oxide precursor solution, stirring overnight, preparing an organic matter PEIE aqueous solution, fully mixing the solutions, spin-coating an ITO substrate with the solution, and annealing at 150 DEG C for 30 minutes; and after annealing is finished, cooling to room temperature, and finally spin-coating the annealed substrate with 2-methoxyethanol to form a hole structure. The preparation method is simple and easy to implement, and the high-efficiency and high-stability organic solar cell is prepared by adjusting the concentration of the PEIE aqueous solution, the morphology of the electron transport layer and the content of organic matter. When the preparation method disclosed by the invention is applied to three systems, namely PBDB-T / DTPPSe-2F, PM6 / Y6 and PTB7-Th / PC71BM, the efficiency is improved by 8%.

Description

technical field [0001] The invention belongs to the field of organic solar cell semiconductor materials, and relates to a preparation method of an organic / inorganic hybrid electron transport layer with a hole structure. Background technique [0002] Organic solar cells, as one of the emerging photovoltaic technologies, have attracted great attention due to their unique advantages such as translucency, solution processability, and mechanical flexibility. Owing to the rapid development of semiconductor materials and device fabrication, single-junction organic solar cells have achieved ultrahigh efficiencies of 18%. Although the material of the active layer plays a decisive role in the realization of high efficiency, the engineering design and optimization of the interface between the active layer and the metal electrode is also crucial. The contact between the interfacial layer and the electrode and the contact between the active layer will affect the device performance, so t...

Claims

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Application Information

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IPC IPC(8): H01L51/44H01L51/46H01L51/48
CPCH10K71/15H10K71/231H10K85/10H10K30/80H10K71/00H10K2102/00Y02E10/549
Inventor 俞江升屈沈雅王宏涛刘鑫光顺
Owner NANJING UNIV OF SCI & TECH
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