Spirobifluorene-Linked Bisanthracene: An Efficient Blue Emitter with Pronounced Thermal Stability

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• 作者：Wen-Jian Shen ; Rajasekhar Dodda ; Chang-Ching Wu ; Fang-Iy Wu ; Tswen-Hsin Liu ; Hsian-Hung Chen ; Chin H. Chen ; and Ching-Fong Shu
• 刊名：Chemistry of Materials
• 出版年：2004
• 出版时间：March 9, 2004
• 年：2004
• 卷：16
• 期：5
• 页码：930 - 934
• 全文大小：106K
• 年卷期：v.16,no.5(March 9, 2004)
• ISSN：1520-5002

文摘

Spiro-FPA, a novel blue emitter, in which two identical anthracene luminophores arelinked orthogonally around a spirobifluorene core, has been synthesized and characterized.The introduction of a spiro linkage into the structure of spiro-FPA leads to a reduction incrystallization tendency and an increase in glass transition temperature relative to themonomeric units. In addition, the tetrahedral nature of the carbon atom at the spiro centerpreserves the optical and electrochemical characteristics of the pristine anthracene units.As demonstrated by AFM measurements, high-quality amorphous films of spiro-FPA withgood morphological stability can be prepared by vapor deposition. Organic EL devicesconstructed using a 1.0-wt % TBP-doped spiro-FPA emitting layer produce bright blueemissions with a high luminescence efficiency of 4.9 cd/A (2.07 lm/W).