The present invention relates to compounds of the formula (1) which are suitable for use in electronic devices, in particular organic electroluminescent devices, and to electronic devices which contain these compounds.
A novel cyclic emitter composed of tetraphenylsilane and tetraphenylethene backbone was successfully synthesized through a convenient homocoupling procedure. The optical and thermal properties of the compound were revealed. Intriguingly, the compound showed different color emissions in solid film, THF solution, and THF/water mixtures. It is assumed that the violet emission was from an isolated component of the emitter, whereas the sky blue and the green emissions were from a crystalline state, and an amorphous state, respectively. The red-shifted emissions were caused by the change of nature of the excitonic coupling.
Wide bandgap materials design toward tunable bandgap and increased carries injection property: silane interrupting π-conjugation together with peripheralcarbazolyl substituents
作者:Dehua Hu、He Liu、Ping Lu、Fangzhong Shen、Ying Lv、Yuguang Ma
DOI:10.1039/c4ra16797j
日期:——
Universal host for blue, green and red phosphorescent dopants is achieved by rational molecule design with silane interrupting π-conjugation and non-conjugated peripheralcarbazolyl substituents.