Synthesis of New Conjugated CNPPV Derivatives Containing Different Lengths of Oligothiophene Units for Organic Solar Cells
✍ Scribed by Fei Wang; Yongsheng Liu; Xiangjian Wan; Jiaoyan Zhou; Guankui Long; Yongsheng Chen
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- English
- Weight
- 418 KB
- Volume
- 211
- Category
- Article
- ISSN
- 1022-1352
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
A new series of CNPPV derivatives that contain oligothiophenes in the polymer backbone, have been synthesized by Knoevenagel polycondensation. Different lengths of oligothiophene units have been introduced to study the relationship between polymer structure and electronic properties. Thermal stability, UV‐vis absorption spectra, and electrochemical properties of the copolymers were studied. The bandgaps estimated from UV‐vis spectra varied from 1.77 to 1.83 eV. BHJ photovoltaic cells from different copolymers and a soluble fullerene derivative have been fabricated. The best PCE of 1.62% was obtained for the polymer CNPPV‐7T, with a short‐circuit current of 5.68 mA · cm^−2^, open‐circuit voltage of 0.66 V, and fill factor of 43.2%. magnified image