Copolymer donor material for optically active layer of polymer solar cell (PSC) and preparation method of copolymer donor material

• Main Authors: HE CHAOQI, HE YING, CAI JIJIE, WANG JUN'AN, WANG XINNAN, CAO YU
• Format: Patent
• Language: English
• Published: 28.01.2015
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOSITIONS BASED THEREON; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; SEMICONDUCTOR DEVICES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention relates to a copolymer donor material for an optically active layer of a polymer solar cell (PSC) and a preparation method of the copolymer donor material. The structural formula of the compound is shown in the specification, wherein n ranges from 3 to 10. According to the method, synthesis steps are simple and mild, raw materials for synthesis are cheap, and preparation cost is low. The obtained copolymer is good in thermal stability (namely half decomposing temperature is higher than 300 DEG C), is good in photoelectric property and dissolving property, and is suitable for being used as the active layer material of the PSC; as the copolymer donor material has a low band gap (1.85eV), electronic transition energy is lowered while the light absorption scope of the material is enlarged to 200-700nm; as the material has a large rigid conjugate structure, the intensity of intramolecular charge transfer (ICT) is enhanced while intermolecular pi-pi accumulation in a solid structure is increased, and thus the copolymer donor material can replace a traditional material for the optically active layer of the PSC.