Polymers containing a dithiophene benzotriazole side chain, preparing method thereof and organic solar cell devices

• Main Authors: ZHOU MINGJIE, WANG PING, ZHANG ZHENHUA, ZHONG TIETAO
• Format: Patent
• Language: English
• Published: 06.05.2015
• 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 belongs to the field of organic semiconductors, and discloses polymers containing a dithiophene benzotriazole side chain, a preparing method thereof and organic solar cell devices. The general structure formula of the host materials is shown in the specification, wherein R1 and R2 are C1-C20 alkyl, and n is an integer from 10 to 100. In the polymers, the dithiophene benzotriazole (BTz) side chain is an important electron acceptor unit, and is beneficial to reduction of the polymer band gap; and diindenopyrazine is a heterocyclic compound having a rigid planar structure, and is high in thermal stability and electronic mobility. The light conversion efficiency can be increased by applying copolymers containing a triphenylamine side chain to solar cells.