Non-fullerene acceptor material based on chiral alkane chain and preparation method thereof

Abstract

The invention relates to a non-fullerene acceptor material based on a chiral alkane chain and a preparation method of the non-fullerene acceptor material. According to the invention, three optically pure non-fullerene small molecule acceptor materials (R, R)-Y6, (S, S)-Y6 and R, S) (-Y6 are synthesized, wherein the small molecule acceptors comprise fused ring benzothiadiazole central cores and electron withdrawing end groups, and small molecules are optically pure materials; when the synthesized optically pure acceptor material is applied to devices, the properties of the devices are different, and the light conversion efficiency of (S, S)-Y6 in the system is obviously higher than that of Y6 molecules of other two configurations and mixtures of the Y6 molecules; and the reported photoelectric conversion efficiency of Y6 molecules is generally about 16%, and under the same condition, when the S-configuration chiral alkane chain is applied to Y6, the efficiency can reach 16.5%.

Description

technical field [0001] The invention belongs to the technical field of preparation of organic solar cell materials, in particular to a non-fullerene acceptor material based on a chiral alkane chain and a preparation method thereof. Background technique [0002] With the increasingly serious energy problems, it is imminent to develop new energy sources, and solar energy has great development prospects because of its clean, non-polluting, inexhaustible and inexhaustible advantages. How to make better use of solar energy is a key solution to the energy crisis. Organic solar cells (OSCs) are a photovoltaic technology with great potential for commercialization due to their advantages of solution processing, roll-to-roll fabrication, light weight, good flexibility, and translucency. After more than two decades of development, the efficiency of single-layer heterojunction organic solar cells has reached 18%, which is attributed to the rapid development of new organic small molecul...

AI Technical Summary

Problems solved by technology

Its disadvantages are that the band gap is too narrow or the performance is too low, so it is not suitable for indoor photovoltaic device applications.

Moreover, most of the indoor organic photovoltaic devices reported now also have problems such as excessive voltage loss or low external quantum efficiency caused by the mismatch between the absorption spectrum and the emission spectrum of common indoor light sources (NatEnergy, 2019, 4, 768–775; Joule, 2020, 4, 1486–1500)

Images