The emerging optoelectronics including but not limit to photovoltaics, photodetection, photocatalysis and LED technologies have shown enormous advantages in green energy，sensing, ligthing/display evolution. Several efforts have made to improve device performances, from the optical and electrical aspects such as the synthesis of semiconductor materials to device fabrication and designs, as well as a fundamental understanding of the underlying working mechanisms. The sessions have focused on the research topics to engineer the optical and electrical properties toward high efficiency and stability optoelectronic devices, including the synthesis of semiconductor materials such as emerging active layer of organic-inorganic metal halide perovskites and interfacial layer of metal oxides, as well as engineering of the interfacial surface, incorporation of nanopatterns, and original understanding of the underlying working mechanisms. They contribute to develop high-efficiency photovoltaics and photocatalysis applications.