Executive Summary : | Light-emitting diodes (LEDs) based on conjugated polymers have gained attention due to their potential applications in displays and solid-state light emitting materials. These devices require low power consumption, rapid response, mechanical flexibility, light weight, cost-effectiveness, and environmental friendliness. Organic derivatives are highly emissive in solution-phase or solvent, but suffer significant quenching due to strong intermolecular interactions. To avoid this, buta-1,3-diene core has been chosen to achieve emission in the solid-state by inhibiting intermolecular interactions. Functional groups have been inserted on buta-1,3-diene core to achieve color-tunability and variations of quantum yields. several buta-1,3-diene cores of mono-, oligo-, and copolymers have been developed and their optical properties have been investigated in the laboratory. However, conjugated polymers often suffer insufficient energy transfer from CT to LE, lowering device performance. The results of solvato-chromic experiments and Lippert-Mataga model calculations show that buta-1,3-diene-based small molecules, oligo-, and polymers have never been applied as emissive layers in LEDs. |