Challenges on Organic Photo-Voltaics and Light-Emitting Diodes – A Concerted Multi-Disciplinary and Multi-Institutional Effort: Hybrid Organic/inorganic Nanostructures for OLED and OPV

We will concentrate on development of smart combinations of semiconducting organic materialswith semiconductor NCs directly attached to each other through a proper choice of the functionalgroups of the both components. Semiconductor NCs to be used will be CdSe/ CdSe/CdS/ CdSe/ZnS(synthesized in organics) and CdTe nanoparticles (synthesized in aqueous solutions) for the visiblespectral range, and lower bandgap NCs such as PbS and PbSe (synthesized in organics) and CdHgTeand HgTe nanoparticles (synthesized in aqueous solution) for the near infrared region. By alteringthe polymer structure, the NC size and composition, and the chemical linking of the twocomponents, the key parameters of the hybrid systems (e.g. relative and absolute HOMO/LUMOlevels, distance between the organic and inorganic components, film morphology) will be altered ina controlled way. Investigation and optimization of energy transfer, charge generation and transportin these materials will be carried out, being of beneficial impact towards improved efficiency ofhybrid organic/inorganic LED and PV devices. Steady-state and time-resolved photoluminescenceand transient absorption spectroscopy, photoluminescence excitation spectroscopy and electricalcharacterization techniques will be applied for their advanced characterization.