OLED with C6/C9 substituted phenanthroimidazoles (DDPPPA/DDPBA) show blue emission with maximum external quantum efficiency (ηex), current efficiency (ηc) and power efficiency (ηp) of 5.7/6.0%, 10.5/12.0 cd A−1 and 8.3/9.2 lm W−1, respectively.
We have synthesized butterfly shaped emitters, TPATPA-PPI and TPATPA-CNPPI having hybridized local and charge-transfer (HLCT) emissive state with hot exciton channel to harvest high-lying triplet excitons (Tn) through reverse intersystem...
We have designed novel blue emitters namely, PPINCN, PPINCN-TPE and PPINCN-Cz with orthogonal D-A structure to harvest maximum exciton efficiency (EUE) through reverse intersystem crossing (RISC) with hot exciton mechanism....
New strategy is developed to construct efficient blue emissive materials using unsymmetrical connection with identical phenanthrimidazole groups leads to donor–acceptor (D–A) architecture.
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