Journal Article 2 inverted structures Polymers 1 Research Support, Non-U.S. Gov't 1 Research Support, U.S. Gov't, Non-P.H.S. 1 atomic layer deposition 1 fill factor 1 mehr ... identical sub-cells 1 nonfullerene organic solar cells 1 polymer solar cells 1 tandem structures 1 tin oxide 1 weniger ...