TFB is widely used as a hole-transport material in organic light-emitting diodes (OLEDs) and perovskite solar cells. It helps improve device efficiency by facilitating the movement of positive charges from the anode to the emissive or active layer. Due to its high thermal stability and suitable energy level alignment, TFB enhances the performance and longevity of optoelectronic devices. It is also employed in thin-film transistors and as a component in multilayer solution-processed devices where interfacial compatibility is critical.