Absorption 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.
Heo et al. Nanoscale Research Letters 2013 8:488 doi:10.1186/1556-276X-8-488