Phosphorescent hybrid organic–inorganic light-emitting systems employing ZnO nanorods as a sensitizer

• Composite hybrid systems based on phosphorescent emitters for harvesting triplet excitons.
• Inorganic ZnO and phosphorescent dyePtOEP co-doped in a Alq3 host.
• ZnO nanorods as a sensitizer for efficient energy transfer and enhanced PL intensity.

We have studied phosphorescent organic light emitting systems comprising hybrid composite films of inorganic ZnO and phosphorescent dye 2,3,7,8,12,13,17,18-octaethylporphine platinum (PtOEP) co-doped in a tris(8-hydroxyquinolinato)-aluminium (III) (Alq3) host. According to the photoluminescence (PL) measurements, ZnO serves as a sensitizer giving rise to efficient energy transfer in the organic–inorganic composite films, leading to enhanced PL intensities.

Room-temperature photoluminescence spectra for the Alq3:PtOEP film with PtOEP to Alq3 weight fraction of 10 wt.% (Alq3:PtOEP 10%), and the Alq3:ZnO:PtOEP film with ZnO and PtOEP to Alq3 weight fractions of 20 wt.% and 10 wt.%, respectively (Alq3:ZnO 20%:PtOEP 10%). Figure optionsDownload as PowerPoint slide