Abstract
A novel wide-bandgap polymer donor PBDTS-DTBTO, which shows an optical bandgap of 1.76 eV and a strong Π–Π interaction feature. Power conversion efficiency reached over 9% in the fullerene-free polymer solar cells (PSC) device By using a low-bandgap acceptor ITIC, indicating complementary absoprtion spectra for the donor and acceptor are of great importance for achieving a highly efficient fullerene-free PSC device. Additionally, the PSC devices fabricated by PBDTS-DTBTO:ITIC showed relatively small sensitivity to variations of the active layer thickness, and PCE equal to 8% could be achieved when the active layer thicknesses range from 50 to 200 nm, suggesting it is a promising candidate for further practical production study of fullerene-free PSC.
Original language | English |
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Journal | Advanced Energy Materials |
Volume | 6 |
Issue number | 15 |
DOIs | |
Publication status | Published - 2016 Aug 10 |
Keywords
- active layer thickness
- complementary absorption
- polymer solar cells
- strong π–π interaction
- wide bandgap polymers
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- General Materials Science