Conjugated polymers and organic materials are highly interesting for future optoelectronic applications including organic solar cells, organic transistors, organic photodiodes, organic light emitting diodes, molecular electronics, and energy storage devices. We design and synthesize new polymer/organic semiconducting materials to obtain desirable optical and electronic properties and ion transporting properties. More specifically, molecular energy level, bandgap, carrier mobility, crystallinity, film morphology, and ion conductivity are controlled by developing new conjugated molecular backbone and introducing functional groups. Additionally, device engineering is being conducted to improve electrical performance.