Cyanophenyl spiro[acridine-9,9′-fluorene]s as simple structured hybridized local and charge-transfer-based ultra-deep blue emitters for highly efficient non-doped electroluminescent devices (CIE<i>y</i> ≤ 0.05)

Abstract

Cyanophenyl substituted spiro[acridine-9,9′-fluorene]s featured with HLCT excited states yielded highly efficient non-doped OLEDs with emissions in high-definition television standard blue color, CIE<italic>y</italic> ≤ 0.05, and CE_max/EQE_max of 6.54 cd A⁻¹/4.63%.