Ultrafast Dynamics Group
Frédéric Laquai's Group

Page 01/29/2019 10:59:59

Organic solar cells based on anthracene‑containing PPE–PPVs and non‑fullerene acceptors

Organic solar cells based on anthracene‑containing PPE–PPVs and non‑fullerene acceptors

S. Alam, R. Meitzner, O. V. Nwadiaru,  C. Friebe, J. Cann, J. Ahner, C. Ulbricht, Z. Kan, S. Höppener, M. D. Hager, D. A. M. Egbe, G. C. Welch, F. Laquai, U. S. Schubert, H. Hoppe. Chemical Papers (2018) 72:1769–1778
S. Alam, R. Meitzner, O. V. Nwadiaru, C. Friebe, J. Cann, J. Ahner, C. Ulbricht, Z. Kan, S. Höppener, M. D. Hager, D. A. M. Egbe, G. C. Welch, F. Laquai, U. S. Schubert, H. Hoppe.
Non-fullerene acceptors (NFA) · Bulk-heterojunction (BHJ) · Organic solar cell (OSC)
2018
​Lately, non-fullerene acceptors (NFAs) have received increasing attention for use in polymer-based bulk-heterojunction (BHJ) organic solar cells (OSCs), as improved photovoltaic performance compared to classical polymer–fullerene blends could be demonstrated. In this study, polymer solar cells based on a statistically substituted anthracene-containing poly(p-phenylene ethynylene)-alt-poly(p-phenylene vinylene)s (PPE–PPVs) copolymer (AnE-PVstat) as donor in combination with a number of diferent electron accepting materials were investigated. Strong photoluminescence quenching of the polymer donor indicates intimate intermixing of both materials. However, the photovoltaic performances were found to be poor compared to blends that use fullerene as acceptor. Time-delayed collection feld (TDCF) measurements demonstrate: charge generation is feld-independent, but bimolecular recombination processes limit the fll factor and thus the efciency of devices.