Abstract
The performance and air stability of inverted polymer solar cells (PSCs) were greatly improved using a combination of LiF-modified ITO cathode and a MoO3/AgAl alloy anode. The power conversion efficiency (PCE) of PSCs with AgAl contact reached 9.4%, which is higher than that of the cells with Ag (8.8%) and Al electrode (7.6%). The PCE of AgAl-based PSCs can further increase up to 10.3% through incorporating an ultrathin LiF-modified ITO. AgAl-based cells also exhibit a superior stability compared to the cells with Ag and Al contacts. PCE of the AgAl-based cells without encapsulation remains 78% of its original value after the cells were aged for 380 days in air. The presence of a LiF-modified ZnO interlayer between ITO and the organic active layer improves the charge collection. The improvement in PCE and stability of the AgAl-based cells is primarily attributed to the formation of AlOx at the MoO3/AgAl interface, preventing Ag diffusion and improving the built-in potential across the active layer in the cells.
Original language | English |
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Pages (from-to) | 3792-3799 |
Number of pages | 8 |
Journal | ACS Applied Materials and Interfaces |
Volume | 8 |
Issue number | 6 |
DOIs | |
Publication status | Published - 17 Feb 2016 |
Scopus Subject Areas
- General Materials Science
User-Defined Keywords
- AgAl alloy
- electrodes
- high efficiency
- LiF interlayer
- MoO3
- polymer solar cells
- stability
- ZnO