High-efficiency deep blue fluorescent emitters based on phenanthro[9,10-d]imidazole substituted carbazole and their applications in organic light emitting diodes

- A series of highly efficient deep blue emitters are designed and synthesized.
- They present narrow FWHM, high quantum yields and high thermal stabilities.
- The doped green device with CIE of (0.31, 0.62) and a ηc of 33 cd A−1 is obtained.
- The doped white device with CIE of (0.31, 0.31) and a ηc of 5.5 cd A−1 is obtained.