Synthesis and characterization of medium band gap polymers with phosphole[3,2-b:4,5-b′]dithiophene oxide as acceptor unit and their application for polymer photovoltaic devices-Science-Chemical Encyclopedia-lookchem

Synthesis and characterization of medium band gap polymers with phosphole[3,2-b:4,5-b′]dithiophene oxide as acceptor unit and their application for polymer photovoltaic devices
Add time:09/29/2019 Source:infona.pl

Two conjugated polymers based on dithienophosphole oxide, PBDT-O-DTPO and PBDT-T-DTPO, were synthesized. Two polymers were fairly soluble in chlorinated solvents, which is enough for device fabrication. According to the UV–vis spectra of films, PBDT-O-DTPO and PBDT-T-DTPO showed absorption onsets of 656 and 675nm, correspond to optical band gaps of 1.89 and 1.84eV, respectively. As the results, two polymers exhibited promising photovoltaic properties with power conversion efficiency (PCE) values of 2.23 and 2.53%, respectively, upon blending with PC71BM under AM 1.5G illumination.

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