Abstract
Abstract Two donor polymers containing thiophene (T) and thienothiophene (TT) as the electron rich, and diketopyrrolopyrrole (DPP) as the electron poor, moieties were synthesized and utilized in organic photovoltaic (OPV) devices. We appended n -decyl side chains onto the thiophenes directly adjacent to the di-hexyldecyl substituted DPP center core to ensure solubility of the resulting polymers. We observed the impact of active layer morphologies, as determined by grazing-incidence wide angle X-ray scattering (GIWAXS) and atomic force microscopy (AFM), on solar cell characteristics. Compared to devices fabricated with the thiophene-containing polymer P(T-DPP ), devices with poly(thienothiophene- alt -diketopyrrolopyrrole), P(TT-DPP) , exhibited higher average power conversion efficiency (PCE) of 3.0% and short circuit current ( J sc ) of 10.4 mA/cm 2 . This higher performance is attributed to an improved charge transport and extraction as a result of a greater degree of intermixing in P(TT-DPP) and fullerene thin film.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
