Abstract
High-efficiency organic photovoltaics (OPV) with a PTB7: PC70BM photoabsorption layer were fabricated by adopting Li- and Cd-doped ZnO electron extraction layers. For devices with both Li- and Cd-doped ZnO, the performances were significantly improved, including the short-circuit current, open-circuit voltage, fill factor (FF), and power conversion efficiency. Furthermore, film characterization with techniques including X-ray diffraction, high-resolution transmission electron microscopy, and resistivity analysis was performed. The results suggest that the improved electrical properties of Li- and Cd-doped ZnO electron extraction layers with a doping ratio of approximately 6 at% are highly effective in achieving a power conversion efficiency of up to 8%.
Original language | English |
---|---|
Article number | 7466779 |
Pages (from-to) | 930-933 |
Number of pages | 4 |
Journal | IEEE Journal of Photovoltaics |
Volume | 6 |
Issue number | 4 |
DOIs | |
State | Published - Jul 2016 |
Keywords
- Doping
- ZnO
- electron extraction layer
- inverted structure
- organic photovoltaics (OPVs)