Phosphor coated NiO-based planar inverted organometallic halide perovskite solar cells with enhanced efficiency and stability

摘要

This work investigates non-rare-earth phosphor (Sr_4Al_(14)O_(25):Mn~(4+), 0.5%Mg) with intensively red luminescence as a luminescent down-shifting layer for perovskite solar cells. The power conversion efficiency of the fabricated device with a structure of NiO/CH_3NH_3PbI_3/[6,6]-phenyl C_(61)-butyric acid methyl ester/Au coated with phosphor layer shows a 10% increase as compared with that of the control devices. Importantly, the phosphor layer coating can realize UV-protection as well as waterproof capability, achieving a reduced moisture-degradation of CH_3NH_3PbI_3 perovskite upon applying an UV irradiation. Therefore, perovskite devices using this luminescent coating show a combined enhancement in both UV down-shifting conversion and long term stability. This can be expanded as a promising encapsulation technique in the perovskite solar cell community.