Bulk heterojunction 1 Bulk-heterojunction solar cells 1 Camphor sulfonic acids 1 CdSE nanoparticles 1 Conducting polymers 1 Heterojunctions 1 Hybrid systems 1 II-VI semiconductors 1 Mixing method 1 Nanocomposites 1 Nanoparticles 1 Physical mixing 1 Poly (o toluidine) Poly-o-toluidine 1 Polymer semiconductors 1 Polymer solar cells 1 Semiconducting cadmium compounds 1 Semiconducting selenium compounds 1 Tri-sodium citrates 1 bulk heterojunction 1 conducting polymer 1 semiconductor 1