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

Description

We will concentrate on development of smart combinations of semiconducting organic materials with semiconductor NCs directly attached to each other through a proper choice of the functional groups 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 visible spectral range, and lower bandgap NCs such as PbS and PbSe (synthesized in organics) and CdHgTe and HgTe nanoparticles (synthesized in aqueous solution) for the near infrared region. By altering the polymer structure, the NC size and composition, and the chemical linking of the two components, the key parameters of the hybrid systems (e.g. relative and absolute HOMO/LUMO levels, distance between the organic and inorganic components, film morphology) will be altered in a controlled way. Investigation and optimization of energy transfer, charge generation and transport in these materials will be carried out, being of beneficial impact towards improved efficiency of hybrid organic/inorganic LED and PV devices. Steady-state and time-resolved photoluminescence and transient absorption spectroscopy, photoluminescence excitation spectroscopy and electrical characterization techniques will be applied for their advanced characterization.