Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6536163 | Solar Energy Materials and Solar Cells | 2013 | 7 Pages |
Abstract
Poly [3,3â´-didodecylquaterselenophene] (PQS) and poly[3,3â´-didodecylquaterselenophene-alt-didodecylquaterthiophene] (PQSQT), have been synthesized by using a Stille cross-coupling reaction. The weight-averaged molecular weights (Mw) of PQS and PQSQT were found to be 18,900Â Da and 22,300Â Da with polydispersity indices of 1.71 and 1.99, respectively. Photophysical measurements found the low bandgaps of 1.73Â eV for PQS and 1.86Â eV for PQSQT. The field-effect mobilities of PQS and PQSQT were determined to be 6.0Ã10â3 and 0.05Â cm2/VÂ s, respectively. The influence of the selenium and sulfur atoms in the polymer backbones were investigated with regard to device performances. The polymers were combined with the PC71BM ([6,6]-phenyl C71-butyric acid methyl ester) acceptor to fabricate bulk heterojunction solar cells with power conversion efficiencies of 0.73-2.37% under AM 1.5Â G (100Â mW/cm2) conditions.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
Woo-Hyung Lee, Sang-Kyu Lee, Won-Suk Shin, Sang-Jin Moon, Soo-Hyoung Lee, In-Nam Kang,