聯苯三氮唑衍生物之合成、性質探討及其在藍色磷光有機發光二極體之應用

陳乃菁

doi:10.6342/NTU.2011.00443

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聯苯三氮唑衍生物之合成、性質探討及其在藍色磷光有機發光二極體之應用

Synthesis and Characterization of triazole-Containing Biphenyl Derivatives and Application in Blue Phosphorescent Organic Light Emitting Diodes

陳乃菁 , Masters　　Advisor：梁文傑　　

繁體中文 DOI： 10.6342/NTU.2011.00443

OLED ；主發光體材料；三氮唑；聯苯；發光二極體； OLED ； 1, 2, 4-trazole ； host ； biphenyl ； emitting diodes

Abstract │ Reference (64) │ Times Cited (1) │ Altmetrics

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In this thesis, 2,2’-bis(1,5-diphenyl-1,2,4-triazol)biphenyl derivatives were successfully prepared. These compounds possess scissor-like conformations which were evidenced by using the spectroscopic and electrochemical methods, as well as by X-ray crystallography. The presence of the ample conformational variations influences their photoluminescence and morphological stability: (1) the scissor-like structures would breakdown the intramolecular pi-conjugation of the molecule, (2) The non-coplanar structure would also hamper the intermolecular stacking, prohibiting the compounds from crystallization and therefore increasing the thermal stability of their amorphous film structure. Two reduction waves by cyclic voltammetry were observed for each compound, indicating that both of the triazole units could be smoothly reduced. Although the reduction potential difference is small, the presence of the difference clearly indicates that through-space electronic interactions are present between the two triazole units. The electronic effects arising from the substituent of terminal phenyl units on the triazole reductions are small. These results suggest that the anionic sites are mainly localized at the triazole units. Delocalization of the negative charges onto the terminal phenyl rings is almost negligible. Organic light emitting diodes (OLED) with 2,2’-bis(1,5-diphenyl-1,2,4-triazol)biphenyl as the host matrix for FIrpic were successfully prepared. Under the best conditions, the OLED exhibited luminance efficiency of 44.3 cd/A with the maximum brightness of 2123 cd/m2.

Reference ( 64 ) 〈TOP〉

1. 陳金鑫、黃孝文，有機電激發光材料與元件 2005.
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Times Cited (1) 〈TOP〉

謝雨軒(2013)。雙偶極咔唑化合物之合成、性質探討及其在藍色磷光有機發光二極體上的應用。臺灣大學化學研究所學位論文。2013。1-152。

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