Bi-functional electroluminescent and photovoltaic devices based on rubrene-doped poly(3-hexylthiophene):1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6)C61 blends

Electroluminescence and photovoltaic properties were observed simultaneously in a small molecular rubrene-doped poly(3-hexylthiophene):1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6)C61 blends based organic solar cells (OSCs). With optimized rubrene doping ratio, the device showed photovoltaic (PV) property with a power convention efficiency 1.05% under illumination and electroluminescence (EL) characteristics with a maximum luminance 65 cd/m2 at higher bias, respectively. It provides a new route to realize the PV and EL bi-functional organic devices. In addition, the EL imaging in OSCs is expected to provide valuable information in the film defect conditions for understanding the blends internal conditions, meliorating the film quality, and further improving the device performance.

Graphical abstractA schematic illustrating of the device and material structures upon investigation.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► A light-emitting organic photovoltaic bi-functional device is successfully fabricated. ► The device performance is optimized by adjusting the rubrene doping ratio in P3HT:PCBM blend. ► 1.05% power convention efficiency and 65 cd/m2 electroluminescence properties are obtained. ► Light-emitting organic photovoltaic is expected to provide useful information on the film defect in organic blends.