Recently the development of emissive materials for organic light-emitting diodes(OLEDs)in the NIR region is becoming a major research subject since such materials can provide a new type of NIR light-emitting device applicable to future optical communication and information processing.However

most of materials for use in NIR OLEDs were organic complexes with trivalent rare earth ions such as Er

3+

Nd

3+

Tm

3+

and Yb

3+

.However

since the f-f transition is

in principle

a parity-forbidden process

there is a substantial problem as regards the EL quantum efficiency.In this paper an organic material containing no rare earth ions:tetra-(2-isopropyl-5-methylphenoxylphthalocyaninato)titanium(Ⅳ)oxide was prepared and characterized by

1

H NMR

MS

elemental analysis

UV-vis absorption spectra

NIR PL spectra and cyclic voltammetry.The OLEDs based on this TiOPc was prepared by spin-coating and thermal evaporation.The structure of device is(ITO/PVK:TiOPc/BCP/LiF/Al).From

1

H NMR

MS

elemental analysis we could found the excellent purity of this TiOPc.Cyclic voltammetry give us HOMO and LOMO level as-5.26

-3.69 eV

respectively.The NIR PL spectra show there is a broad band peaked at 1080 nm.The electroluminescent(EL)devices with the TiOPc complex as the emitting layer were fabricated and they exhibit EL emission peaked at 1050 nm.In the TiOPc-doped devices the optimum concentration was 30%(mass fraction)

whit the intensity of NIR EL extremely high.This work is an original work of OLEDs in NIR region

so the efficiency and life should be improve in the future.