This study reports the synthesis, curing, and optoelectronic properties of a solution-processable, thermally cross-linkable electron- and hole-blocking material containing fluorene-core and three periphery N-phenyl-N-(4-vinylphenyl) benzeneamine (FTV). The FTV exhibited good thermal stability with T d above 478 °C in nitrogen atmosphere. The FTV is readily cross-linked via terminal vinyl groups by heating at 160 °C for 30 min to obtain homogeneous film with excellent solvent resistance. Multilayer PLED device [ITO/PEDOT:PSS/cured-FTV/MEH-PPV/Ca (50 nm)/Al (100 nm)] was successfully fabricated using solution processed. Inserting cured-FTV is between PEDOT:PSS and MEH-PPV results in simultaneous reduction in hole injection from PEDOT:PSS to MEH-PPV and blocking in electron transport from MEH-PPV to anode. The maximum luminance and maximum current efficiency were enhanced from 1810 and 0.27 to 4640 cd/m 2 and 1.08 cd/A, respectively, after inserting cured-FTV layer. Current results demonstrate that the thermally cross-linkable FTV enhances not only device efficiency but also film homogeneity after thermal curing. FTV is a promising electron- and hole-blocking material applicable for the fabrication of multilayer PLEDs based on PPV derivatives.
|Number of pages||10|
|Journal||Journal of Polymer Science, Part A: Polymer Chemistry|
|Publication status||Published - 2012 Sep 15|
All Science Journal Classification (ASJC) codes
- Polymers and Plastics
- Organic Chemistry
- Materials Chemistry