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37.1: Invited Paper: Third Generation OLED by Hyperfluorescence

Although typical organic molecules are simply composed of carbon (C), hydrogen (H), nitrogen (N) and oxygen (O) atoms, their unique bonding manners based on sp3, sp2 and sp hybrid orbitals enables very sophisticated molecular architectures, leading to unique functions. By using unlimited freedom of molecular structures, we designed new light emitting molecules, the hyper fluorescence‐highly efficient delayed fluorescence. With the proper molecular design, the energy levels of the excited states, i.e., singlet (S1) and triplet (T1) excited states, are minimized, promoting efficient upconversion from T1 to S1 states, resulted in an ultimate EL efficiency.