Premium
Organic Nanoclusters on Inorganic Nanostructures for Tailoring the Emission Properties of Organic Materials
Author(s) -
Ng Alan ManChing,
Djurišić Aleksandra B.,
Tam KaiHang,
Kwok WaiMing,
Chan WaiKin,
Tam Wing Yan,
Phillips David Lee,
Cheah KokWai
Publication year - 2008
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200700264
Subject(s) - nanoclusters , materials science , nanorod , photoluminescence , nanostructure , nanotechnology , quantum dot , light emission , optoelectronics
Inorganic nanostructures have been intensively studied because of their size‐dependent emission color as a result of quantum confinement effects. In contrast, no significant size dependence of the optical properties is expected for organic nanostructures owing to the weak nearest‐neighbor interactions in molecular crystals; however, the optical properties of organic materials can be significantly affected by aggregation and molecular packing, which can result in large differences between the emission spectra of solutions and thin films. Thus, the emission spectra of organic nanostructures may differ considerably from the bulk material despite the absence of quantum confinement effects. We demonstrate that 3,4,9,10‐perylenetetracarboxylicdiimide (PTCDI) nanoclusters grown on ZnO nanorods exhibit an intense blue‐white photoluminescence, different from the weak red emission of PTCDI films. Light emitting diodes consisting of ZnO nanorods and PTCDI nanoclusters also exhibited white emission.