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Method for improving photoelectric conversion efficiency and light-heat stability of organic solar device

A technology of photoelectric conversion efficiency and organic solar energy, which is applied in photovoltaic power generation, electric solid-state devices, semiconductor devices, etc., can solve the problems of small insulating molecules affecting device performance, improve photoelectric conversion efficiency and photothermal stability, and improve phase separation , Increase the effect of thermal stability

Inactive Publication Date: 2017-06-13
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The doping of insulating small molecules will affect the performance of the device, and it is only applicable to some systems

Method used

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  • Method for improving photoelectric conversion efficiency and light-heat stability of organic solar device
  • Method for improving photoelectric conversion efficiency and light-heat stability of organic solar device
  • Method for improving photoelectric conversion efficiency and light-heat stability of organic solar device

Examples

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Effect test

Embodiment 1

[0021] This embodiment is based on the light absorbing layer being PTB7-Th:PC 71 Adding 1,4-butanedithiol with a boiling point of 196 °C as a solvent additive to the BM reverse solar cell, compared with the traditional additive DIO, can improve its device performance and photostability. The specific steps are as follows.

[0022] (1) Cleaning of the cathode ITO glass: The ITO glass is ultrasonically cleaned twice with acetone, once with detergent, and three times with deionized water, each cleaning time is more than 15 minutes, and then dried by plasma for 3 minutes.

[0023] (2) Preparation of cathode buffer layer: spin-coat ZnO precursor solution on the ITO cathode surface cleaned in step (1), and sinter on a hot stage at about 200 °C to obtain a ZnO film with a thickness of about 40 nm.

[0024] (3) Preparation of the active layer: Spin-coat the light-absorbing layer solution on the ZnO film that has undergone the above operations at a rotation speed of 800 rpm for 1 minute...

Embodiment 2

[0029] This embodiment is based on the light absorbing layer being PTB7-Th:PC 71 Adding 1,3-propanedithiol with a boiling point of 169 °C as a solvent additive to the BM reverse solar cell, compared with the traditional additive DIO, can improve its device performance and thermal stability. The specific steps are as follows.

[0030] (1) Cleaning of cathode ITO glass: ITO glass is ultrasonically cleaned twice with acetone, once with detergent, and three times with deionized water, each cleaning time is more than 15 minutes, and then dried and treated with ultraviolet light for 10 minutes.

[0031] (2) Preparation of cathode buffer layer: spin-coat ZnO precursor solution on the ITO cathode surface cleaned in step (1), and sinter on a hot stage at about 220 °C to obtain a ZnO film with a thickness of about 40 nm.

[0032] (3) Preparation of the active layer: Spin-coat the light-absorbing layer solution on the ZnO film that has undergone the above operations at a rotation speed o...

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Abstract

Provided is a method for improving the photoelectric conversion efficiency and the light-heat stability of an organic solar device. A little amount of mercaptan-type solvent additive is added to an organic solar cell light absorption layer solution, appropriate aggregation and separation of a donor and a receptor are achieved through the solvent effect of the solvent additive on the receptor in the light absorption layer spin-coating and film-forming process, the purity of a donor phase is improved, and the light-heat stability of the device is improved while the photoelectric conversion performance is improved. The method is a simple morphological control means, the shortcomings of likely light decomposition of an existing halogen additive are avoided, the donor and the receptor distribution situation at a body heterojunction is also optimized, and the photoelectric conversion efficiency and light-heat stability of the device are effectively improved by adopting the method.

Description

technical field [0001] The invention belongs to the technical field of energy conversion, and more specifically relates to a method for improving photoelectric conversion and photothermal stability of an organic solar cell. Background technique [0002] In recent years, due to the shortage of energy on the earth, bulk heterojunction solar cells have attracted extensive attention due to their advantages of solution processing, light weight, flexibility and large-area fabrication. The bulk heterojunction solar cell is a device similar to a sandwich structure. The upper and lower layers are electrodes, and the middle is a light-absorbing layer where donors and acceptors are mixed. There is often an interface layer between the electrodes and the light-absorbing layer for transition. However, before the actual application of bulk heterojunction solar cells, there are still three points that need breakthroughs, namely, high photoelectric conversion efficiency, high stability, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K85/00H10K30/00H10K30/30Y02E10/549
Inventor 陈义旺谢远鹏周魏华胡笑添
Owner NANCHANG UNIV
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