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Full-small-molecule organic solar cell based on novel additive and preparation method of full-small-molecule organic solar cell

A technology of solar cells and additives, applied in the field of solar cells, can solve problems such as environmental hazards and unsatisfactory effects, and achieve the effects of promoting crystallization, facilitating exciton separation and charge transport, and promoting enhancement

Pending Publication Date: 2021-11-05
成都灵睿奥创科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In previous related reports, by incorporating fullerene PC 71 BM is used in polymer organic solar cells to adjust the morphology of the active layer of the device and improve the photoelectric conversion efficiency of the device. However, studies have shown that the effect of binary devices composed of BTR and fullerene PC71BM acceptors is not ideal, and the traditional addition of halogen-containing elements Additive DIO is used to improve the efficiency of polymer small molecule systems, which will bring harm to the environment. Therefore, finding a safe and effective additive to improve the photoelectric conversion efficiency of organic solar cells has great scientific impact and practical significance

Method used

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  • Full-small-molecule organic solar cell based on novel additive and preparation method of full-small-molecule organic solar cell
  • Full-small-molecule organic solar cell based on novel additive and preparation method of full-small-molecule organic solar cell
  • Full-small-molecule organic solar cell based on novel additive and preparation method of full-small-molecule organic solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1 Preparation of all small molecule organic solar cells based on novel additives

[0027] Weigh 1mg of BTR and 5mg of PC71BM, add 12μg of alcohol additives and dissolve in 100ul of dichloromethane,

[0028] The structural formula of alcohol additives is

[0029] Set square resistance to 15Ω / cm 2 The ITO conductive glass is pre-sonicated with ethanol, then ultrasonically cleaned with detergent water, ultrapure water, acetone, isopropanol, and ethanol, and then dried with a nitrogen gun, and the dried ITO glass is cleaned. Plasma ozone treatment for 30 minutes; place the ITO glass treated with ion ozone in a nitrogen environment and spin-coat PEDOT:PSS at a spin-coating speed of 6000 rpm for 20 seconds, then place it on a heating platform and anneal for 60 minutes at an annealing temperature of 200 degrees;

[0030] The active material was spin-coated on the PEDOT:PSS electron transport layer at a spin-coating speed of 3000rpm, placed in a glass vessel, and an...

Embodiment 2

[0032] Example 2 Preparation of all small molecule organic solar cells based on novel additives

[0033] Weigh 2mg of BTR and 2mg of PC71BM, add 12μg of alcohol additives and dissolve in 100ul solvent chlorobenzene,

[0034] The structural formula of alcohol additives is

[0035] Set square resistance to 15Ω / cm 2 The ITO conductive glass is pre-sonicated with ethanol, then ultrasonically cleaned with detergent water, ultrapure water, acetone, isopropanol, and ethanol, and then dried with a nitrogen gun, and the dried ITO glass is cleaned. Plasma ozone treatment for 30 minutes; place the ITO glass treated with ion ozone in a nitrogen environment and spin-coat PEDOT:PSS at a spin-coating speed of 4000 rpm for 50 seconds, then place it on a heating platform and anneal for 30 minutes at an annealing temperature of 120 degrees;

[0036] The active material was spin-coated on the PEDOT:PSS electron transport layer with a spin-coating speed of 2000rpm, placed in a glass vessel, a...

Embodiment 3

[0038] Example 3 Preparation of all small molecule organic solar cells based on novel additives

[0039] Weigh 2mg of BTR and 1mg of PC71BM, add 12μg of alcohol additives and dissolve in 100ul of chloroform,

[0040] The structural formula of alcohol additives is

[0041] Set square resistance to 15Ω / cm 2The ITO conductive glass is pre-sonicated with ethanol, then ultrasonically cleaned with detergent water, ultrapure water, acetone, isopropanol, and ethanol, and then dried with a nitrogen gun, and the dried ITO glass is cleaned. Plasma ozone treatment for 30 minutes; place the ITO glass after ion ozone treatment in a nitrogen environment to spin-coat PEDOT:PSS, spin-coating speed 2000rpm, spin-coating time 20-60 seconds, and then place it on a heating platform and anneal for 30min at an annealing temperature of 100 Spend;

[0042] The active material was spin-coated on the PEDOT:PSS electron transport layer at a spin-coating speed of 1000rpm, placed in a glass vessel, an...

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Abstract

The invention relates to the technical field of solar cells, in particular to a full-small-molecule organic solar cell based on a novel additive and a preparation method thereof. The full-small-molecule organic solar cell comprises a substrate, a hole transport layer, an active layer, an electron transport layer and a metal electrode, and the hole transport layer is coated with an active material to form the active layer; the active material comprises a donor, a receptor and an alcohol additive, and the chemical formula of the alcohol additive is CxH2x+2O, wherein x is 5-14. Compared with the prior art, according to the full-small-molecule organic solar cell based on the novel additive, the alcohol material is selected as the additive for the first time to be added into the active layer of the full-small-molecule organic solar cell based on a BTR: PC71BM binary system, and the alcohol material has good miscibility with main system materials BTR and PC71BM; meanwhile, hydrogen bonds can be formed with electronegative groups in a donor and an acceptor, crystallization of an original binary system material can be promoted, the morphology of an active layer can be improved, trap recombination of single molecules and double molecules can be reduced, and exciton separation and charge transfer are facilitated.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a novel additive-based all-small-molecule organic solar cell and a preparation method thereof. Background technique [0002] Currently, organic solar cells have attracted great interest in academia and industry due to their outstanding advantages such as light weight, easy fabrication, low cost, good flexibility, and translucency. Solution-processed bulk heterojunction organic solar cells are a promising photovoltaic technology for next-generation energy conversion. Traditional bulk heterojunction organic solar cells are generally obtained by mixing electron donor materials (conjugated polymers or small molecules) and fullerene electron acceptor materials (such as PC61BM and PC71BM). Among them, all-small-molecule-based organic solar cells are an attractive alternative to polymer-based devices. Higher material purity can be achieved through well-defined molecular discrete s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K85/00H10K85/211H10K85/655H10K85/656H10K85/6576H10K30/211Y02E10/549Y02P70/50
Inventor 罗钧议赵文博安欣威樊子卿程溢川张瀚文胡雨蒋果肖静瑶
Owner 成都灵睿奥创科技有限公司
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