Studies On Synthesized, Characterization And Photoelectric Properties Of Starburst Metal Complexes

Extensive attention has been paid for organic electroluminescence (OEL) for its'unique advantages in the field of modern display technique. Organic electro luminescent materials have many merits, for example, lower drive voltage which suits the voltage of integrate circuit, shorter response time, high luminescence brightness and efficiency, easy to modulate color to realize the whole color display and so on. At the same time, organic functional devices such as organic memory device, organic photovoltaic and optical oxygen sensors have become research hotspot.Starburst complex based on soluble fabricate techniques will make the display more cheap, more easy. Physics properties and photoelectric properties of starburst complex can be optimized independence and we can control the interaction in the molecule. There is more bulk and more complicated structure of the starburst molecule and higher glass transition temperatures (Tg), so these complexes generally have excellent film-firming property, fascinating thermal and morphological stability as active medium in organic optoelectronic devices. Therefore, design and synthesis of starburst complex can improve retention ability, especially in the high current situation.In this thesis, we report the synthesis of three starburst metal complexes: (1) starburst europium (III) complex (Eu3(DBM)9(TMMB)), (2) starburst ruthenium (II) complexes ([Ru3(bpy)6(TMMB)]6+ and [Ru3(phen)6(TMMB)]6+), (3) starburst rhenium (I) complex ([Re3(CO)9TMMB]3+). Fabricating organic memory device and organic photovoltaic device based on starburst europium (III) complex, more than 106 write-read-erase-reread cycles has been performed in ambient conditions and the ON/OFF current ratio yet maintains about 10 after 11 h stress test, showing potential applications as a memory cell. Under an illumination of 4 mW/cm2 UV light, the device exhibits an open-circuit voltage (VOC) of 1.70 V, a short circuit current (ISC) of 38.9μA/cm2, a fill factor (FF) of 0.25 and a power conversion efficiency of 1.05%. The preparation and oxygen sensing properties of optical materials based on two trinuclear starburst ruthenium(II) complexes assembled in two mesoporous silicate (MCM-41, SBA-15) are described, good sensitivity(I0/I1>5, I0/I1>3) is obtained.