Synthesis and characterization of thieno[3,4-c]pyrrole-4,6-dione-based copolymers for polymer solar cells

• DOI: 10.3938/jkps.67.1023
• Publication Date: 2015-10-01T19:27:08Z
• Authors: Sachin Badgujar; Sang Kyu Lee; Taek Ahn
• Keywords: 2. Zero hunger; 0103 physical sciences; 7. Clean energy; 01 natural sciences

Two thieno[3,4-c]pyrrole-4,6-dione (TPD)-based copolymers, poly[5,10-bis(2-ethylhexyloxy) naphtho[1,2-b:5,6-b’]dithiophene-2,7-diyl-alt-1,3-(5-heptadecan-9-yl)-4H-thieno[3,4-c]pyrrole-4,6-dione] (P1) and poly[4,9-bis(2-ethylhexyloxy)naphtho[1,2-b:5,6-b’]dithiophene-2,7-diyl-alt-1,3-(5-heptadecan-9-yl)-4H-thieno[3,4-c]pyrrole-4,6-dione] (P2), were synthesized and used as donor materials in polymer solar cells (PSCs). The optical, electrochemical, and photovoltaic properties of the copolymers were investigated. Under optimized conditions, the TPD-based polymers showed power conversion efficiencies (PCEs) for the PSCs in the range from 1.1 to 2.1% under AM 1.5 illumination (100 mW/cm2).