| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a charge transport material having high chemical stability and large T<SB>1</SB>(lowest excited triplet energy level), and to provide a highly efficient organic electroluminescent (EL) device having a low driving voltage, and even high driving durability. <P>SOLUTION: The charge transport material is represented by general formula (1) or general formula (2) (wherein, L<SP>1</SP>and L<SP>2</SP>each independently represents a connecting group; R and R<SP>N</SP>each independently represents a substituent; R<SP>1</SP>and R<SP>2</SP>each independently represents a substituent, with the proviso that both of R<SP>1</SP>and R<SP>2</SP>are not aryl at the same time; As each independently represents a carbon atom or nitrogen atom; n represents an integer of≥2 and≤10; and m represents an integer). <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
