“In the field of organic light-emitting diodes, researchers have designed and synthesized two tetrasubstituted carbazole derivatives, TBICz and TOXDCz, which possess twist skeletons and exhibit excellent thermal and morphological stabilities. Utilizing these novel compounds as host materials, high efficiency solution-processed green phosphorescent organic light-emitting diodes have been achieved. The best EL performance is achieved for the TBICz-based device, which provides more host material options for solution-processed OLEDs.”