Cost-effective, solution-processable organic photovoltaics (OPV) present an interesting alternative to inorganic silicon-based solar cells. However, one of the major remaining challenges of OPV devices is their lack of long-term operational stability, especially at elevated temperatures. The synthesis of a fullerene dumbbell and its use as an additive in the active layer of a PCDTBT:PCBM-based OPV device is reported. The addition of only 20 % of this novel fullerene not only leads to improved device efficiencies, but more importantly also to a dramatic increase in morphological stability under simulated operating conditions. Dynamic secondary ion mass spectrometry (DSIMS) and TEM are used, amongst other techniques, to elucidate the origins of the improved morphological stability. Fullerene dumbbells: Long-term operational stability of organic photovoltaics remains a challenge, especially at high temperatures. A novel fullerene dumbbell was synthesized and used as an additive in the active layer. The addition of the dumbbell not only leads to improved device efficiencies, but also to a dramatic increase in morphological stability (see picture) under simulated operating conditions.
|Original language||English (US)|
|Number of pages||6|
|Journal||Angewandte Chemie - International Edition|
|State||Published - Nov 1 2014|
Bibliographical notePublisher Copyright:
© 2014 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
- organic solar cells
ASJC Scopus subject areas