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Low Band Gap Polymer Solar Cells With Minimal Voltage Losses.
- Source :
- Advanced Energy Materials; 9/21/2016, Vol. 6 Issue 18, pn/a-N.PAG, 10p
- Publication Year :
- 2016
-
Abstract
- One of the factors limiting the performance of organic solar cells (OSCs) is their large energy losses ( E<subscript>loss</subscript>) in the conversion from photons to electrons, typically believed to be around 0.6 eV and often higher than those of inorganic solar cells. In this work, a novel low band gap polymer PIDTT-TID with a optical gap of 1.49 eV is synthesized and used as the donor combined with PC<subscript>71</subscript>BM in solar cells. These solar cells attain a good power conversion efficiency of 6.7% with a high open-circuit voltage of 1.0 V, leading to the E<subscript>loss</subscript> as low as 0.49 eV. A systematic study indicates that the driving force in this donor and acceptor system is sufficient for charge generation with the low E<subscript>loss</subscript>. This work pushes the minimal E<subscript>loss</subscript> of OSCs down to 0.49 eV, approaching the values of some inorganic and hybrid solar cells. It indicates the potential for further enhancement of the performance of OSCs by improving their V<subscript>oc</subscript> since the E<subscript>loss</subscript> can be minimized. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 16146832
- Volume :
- 6
- Issue :
- 18
- Database :
- Complementary Index
- Journal :
- Advanced Energy Materials
- Publication Type :
- Academic Journal
- Accession number :
- 118246920
- Full Text :
- https://doi.org/10.1002/aenm.201600148