By Marco Mazzeo

ISBN-10: 9533071400

ISBN-13: 9789533071404

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In addition, device performance with these t modified molecules m will be discussed. 1 Physical properties of hole transporting t matterials Tested molecules having hole-transp porting propertiees are shown in Fiig. 2. 46 Organic Light Emitting Diode N N N N HTM 2 HTM 1 N N N N HTM 3 HTM 4 Fig. 2. Hole-transporting materials Absorption spectra were measured with a HITACHI U-3000 UV spectrophotometer. 1H NMR and 13C NMR spectra were recorded with a JEOL JNM-ECP 400 FT NMR spectrometer. Differential scanning calorimetry (DSC) was performed on a TA Instruments, DSC-2910 unit using a heating rate of 10 °C/min and a cooling rate of 40 °C/min.

Lee, S. ; Teng, P. ; Kwong, H. ; Zheng, H. & Che, C. M. (2001). Reduction of Self-Quenching Effect in Organic Electrophosphorescence Emitting Devices via the Use of Sterically Hindered Spacers in Phosphorescence Molecules. Advanced Materials, Vol. 13, pp. 1245-1248. ; Hou, J. & Liu, S. (2005). White organic light emitting devices based on 4,4’-bis(2,2’-diphenylvinyl)-1,1’-biphenyl and phosphorescence sensitized 5,6,11,12-tetraphenylnaphthacene. Applied Physics Letters, Vol. 86, pp. 011112011114.

1. Fig. 1. The molecular structures of methyl substituted Ir(dmppy)3 derivatives. 1 Structural, Electrochemical, Photophysical properties The methyl substituted Ir(dmppy)3 derivatives were synthesized by the Suzuki coupling reaction of 2-bromo-n-methylpyridine with the corresponding n’-methylphenylboronic acid in the presence of K2CO3 and [Pd(PPh3)4] catalyst as reported by our research group (Jung et al. 2004). We found that the fac- isomer was formed as the major component, although some mer- isomer was formed with low yields and can be isolated.

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Organic Light Emitting Diode by Marco Mazzeo


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