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Journal of Materials Chemistry C Vol - 1 Issue - 8

Journal of Materials Chemistry C Vol - 1 Issue - 7

Journal of Materials Chemistry C Vol - 1 Issue - 6

Journal of Materials Chemistry C Vol - 1 Issue - 5

Tuning the colour and efficiency in OLEDs by using amorphous or polycrystalline emitting layers

Content Provider	Royal Society of Chemistry (RSC)
Author	Braga, Dario Cocchi, Massimo Mazzeo, Paolo Pio Maini, Lucia Brulatti, Pierpaolo Muzzioli, Sara Fattori, Valeria Milita, Silvia Stagni, Stefano
Copyright Year	2013
Abstract	We investigated the nature of the emissive states in newly synthesized cyclometallated Pt complexes containing a chelating 2-pyridyl tetrazolate (2-PTZ) ligand, namely Pt(ppy)(2-PTZ), and Pt(F2ppy)(2-PTZ) as a solid-state phosphor, by examining their structural properties versus their phosphorescence (PH) and electroluminescence (EL) characteristics. It is found that the observed tuning of both PH and EL spectra, their red shift and shortening decay with increasing concentration in the complex blends are due to the competition between three emissive states: monomer, excimer and dimer. The pure dimer emission appeared in neat films, reaching a high PH quantum yield of about 75% and external EL efficiency approaching 10% for the OLED based on the neat Pt(F2ppy)(2-PTZ) complex film as an emitting layer (EML). X-ray diffraction proved the high structural order of the latter thin film. These findings have a direct impact on the design of a new OLED generation based on single phosphor multi-emission controlled by the structural order degree of the EML.
Starting Page	1823
Ending Page	1831
Page Count	9
File Format	HTM / HTML PDF
ISSN	20507526
Volume Number	1
Issue Number	9
Journal	Journal of Materials Chemistry C
DOI	10.1039/c2tc00448h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	EML Ligand Phosphorescence Electroluminescence Monomer Excimer Protein dimer Quantum X-ray crystallography
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry

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