Efficient Solution-Processed Nondoped Deep-Blue Organic Light-Emitting Diodes Based on Fluorene-Bridged Anthracene Derivatives Appended with Charge Transport Moieties

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• 作者：Minrong Zhu ; Tengling Ye ; Chen-Ge Li ; Xiaosong Cao ; Cheng Zhong ; Dongge Ma ; Jingui Qin ; Chuluo Yang
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：September 15, 2011
• 年：2011
• 卷：115
• 期：36
• 页码：17965-17972
• 全文大小：960K
• 年卷期：v.115,no.36(September 15, 2011)
• ISSN：1932-7455

文摘

A series of fluorene-bridged anthracene derivatives appended with different charge transport moieties were synthesized, and their thermal, photophysical, and electrochemical properties were investigated. By the introduction of fluorene between two anthracene units as well as peripheral functional aryl substituents, the sophisticated compounds show a decreased tendency to crystallize and have high glass transition temperatures ranging from 165 to 229 掳C. The theoretical calculations reveal that the four self-hosted blue emitters possess noncoplanar structure to suppress the intermolecular interaction in films. Solution-processed small-molecular organic light-emitting diodes featuring 1 as the emitter achieve a maximum current efficiency of 2.0 cd A^鈥? with Commisssion Internationale de L鈥橢clairage (CIE) coordinates of (0.15, 0.13), which are very close to the National Television Standards Committee鈥檚 blue standard. A facile strategy to design solution-processable highly emissive anthracene derivatives for nondoped deep-blue electroluminescence by incorporating 蟺-conjugated bridge and bipolar charge transport periphery is demonstrated.