N-ester substituent bithiophene/pyrrole conjugated polymer

Abstract

The invention relates to an N-ester substituent bithiophene/pyrrole conjugated polymer, belonging to the field of polymer solar cell materials. The structural formula of the N-ester substituent bithiophene/pyrrole conjugated polymer is disclosed as formula I, wherein R is C6-C12 straight-chain and branched-chain paraffins. The polymer can be used as the electron donor material of the polymer solar cell to effectively lower the HOMO energy of the donor material and obtain the photovoltaic device with high open circuit voltage, thereby enhancing the photoelectric conversion efficiency of the polymer solar cell.

Description

Technical field The invention relates to a conjugated polymer used for preparing polymer solar battery electron donor materials, and belongs to the field of polymer solar battery materials. Background technique Polymer solar cells have the advantages of low cost, light weight, rollability, and portability, and are the most promising solar cells. However, the main problems restricting the development of polymer solar cells are poor electrochemical energy level matching, low hole mobility, and narrow absorption spectrum of conjugated polymer materials serving as electron donor materials. In order to solve these problems, the use of DAD conjugated polymers with parallel aromatic ring structures can obtain broadened absorption spectra and higher hole mobility, and through fine modification and adjustment of the substituent structure, optimized electrochemical properties can be obtained . For conjugated polymer materials that act as electron donors, the difference between the high...

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