Figure 4From: Modification of hybrid active bilayer for enhanced efficiency and stability in planar heterojunction colloidal quantum dot photovoltaicsAbsorption spectra and schematic outline. (a) Absorption spectra of hybrid active layers. (b) Schematic outline of the PbS CQD solid film. The left image represents the network in PbS CQD with OA ligand, and the right image represents the network in PbS CQD with Br atomic ligand.Back to article page