Scientific Results

Multi-colour electroluminescence of dendronic antennae containing pyrenes as light harvesters

Year: 2010

Authors: Giovanella U., Mróz W., Foggi P., Fabbrizzi P., Cicchi S., Botta C.

Autors Affiliation: CNR, Ist Studio Macromol ISMAC, I-20733 Milan, Italy; European Lab Nonlinear Spect LENS, I-50019 Sesto Fiorentino, FI, Italy; Univ Perugia, Dipartimento Chim, I-06123 Perugia, Italy; INOA CNR, I-50125 Florence, Italy; Univ Florence, Dipartimento Chim Organ, I-50019 Sesto Fiorentino, FI, Italy; INSTM Italian Interuniv Consortium Mat Sci & Tech, I-50019 Sesto Fiorentino, FI, Italy

Abstract: Dendronic antennae systems containing pyrene units as energy donors and a styrylpyridinium derivative as energy acceptor show efficient energy transfer from the green-emitting pyrene excimer to the red-emitting acceptor. For the third dendron generation the effective screening of the pyrene units on the acceptor provides thin films showing bright red emission. Single-layer light-emitting diodes prepared by properly balancing the dendrons and donor units concentration in polyvinylcarbazole show electroluminescence from the blue, green and red components of the monomeric donor, the donor excimer and the acceptor when excitons are generated in the polymer and subsequently transferred to the molecules by resonant energy transfer.

Journal/Review: CHEMPHYSCHEM

Volume: 11 (3)      Pages from: 683  to: 688

More Information: This work was partially supported by Progetto MIUR FIRB RBIP06JWBH NODIS, FIRB RBNE033KMA, PRIN 2007PBWN44 and Project WOLED of the CARIPLO Foundation.
KeyWords: dendrons; electroluminescence; energy transfer; excimer; organic light-emitting diodes
DOI: 10.1002/cphc.200900771

Citations: 5
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