Fig. 2From: Balanced Dipole Effects on Interfacial Engineering for Polymer/TiO2 Array Hybrid Solar Cells a and b are side views of the SEM images of TiO2-NRA@TiO2-QDs on the FTO substrate. The inset in (b) with pseudocolor is the top view of the TiO2-NRA@TiO2-QDs structureBack to article page