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

Cui, Jin, Li, Pengfei, Chen, Zhifan, Cao, Kun, Li, Dan, Han, Junbo, Shen, Yan, Peng, Mingying, Fu, Yong Qing and Wang, Mingkui (2016) Phosphor coated NiO-based planar inverted organometallic halide perovskite solar cells with enhanced efficiency and stability. Applied Physics Letters, 109 (17). p. 171103. ISSN 0003-6951

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Abstract

This work investigates non-rare-earth phosphor (Sr4Al14O25:Mn4+, 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/CH3NH3PbI3/[6,6]-phenyl C61-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 CH3NH3PbI3 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.

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