NDLI: Photo- and electroluminescent properties of zinc(II) complexes with tetradentate Schiff bases, derivatives of salicylic aldehyde

Content Provider	Springer Nature Link
Author	Vashchenko, A. A. Lepnev, L. S. Vitukhvskii, A. G. Kotova, O. V. Eliseeva, S. V. Kuz’mina, N. P.
Copyright Year	2010
Abstract	It is studied how the introduction of various substituents into the composition of organic ligands affects the photoluminescence spectra of new zinc(II) complexes with tetradentate Schiff bases H$_{2}$L (derivatives of salicylic aldehyde (H$_{2}$SAL1, H$_{2}$SAL2) and o-vanillin (H$_{2}$MO1, H$_{2}$MO2) with ethylenediamine and o-phenylenediamine) in the form of bulk solids and thin films. It is demonstrated that the emission spectra of bulk solid complexes without o-phenylenediamine bridges (ZnSAL1 and ZnMO1) contain additional long-wavelength bands compared to the spectra of corresponding thin films. In the case of films obtained from [ZnSAL1]$_{2}$ dimer complexes, the long-wavelength band is dominant. At the same time, the photoluminescence spectra of ZnSAL2 and ZnMO2 complexes with o-phenylenediamine bridges are similar in the case of solid samples and thin films. The electroluminescent properties of organic light-emitting diodes (OLEDs) with the ITO/α-NPD/ZnL/Ca:Al structure are studied. The bathochromic shift of the electroluminescence peaks of OLEDs with respect to the photoluminescence spectra of bulk solid samples and thin films is probably related to the formation of exciplexes at the α-NPD/ZnL interface. The electroluminescence spectra of OLEDs based on [ZnSAL1]$_{2}$ show a hypsochromic shift of the emission maximum, which can be caused by a shift of the recombination region into the α-NPD layer.
Starting Page	463
Ending Page	465
Page Count	3
File Format	PDF
ISSN	0030400X
Journal	Optics and Spectroscopy
Volume Number	108
Issue Number	3
e-ISSN	15626911
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2010-04-09
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Optics, Optoelectronics, Plasmonics and Optical Devices
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electronic, Optical and Magnetic Materials

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