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

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.

Application of luminescence downshifting materials for enhanced stability of CH3NH3PbI3(1-x)Cl3x perovskite photovoltaic devices

“…In the timeframe of this test, there appears no difference between the stability of the cells with the commercial UV filter and the LDS layer. This result shows an improvement on the data reported recently by Cui et al, who used a magnesium based luminescent compound 29 . Thus, by using figure of merits, as described in the experimental section, to better identify suitable LDS layers, improved stability can be found.…”

“…Thus, LDS layers absorb higher-energy photons and convert the wavelength to one that is closer to the maximum external quantum efficiency (EQE) of the solar cell. In PSCs, previous reports have employed phosphor materials to improve the performance of PSCs by the LDS effect 22,29,30 . In addition to the PCE enhancements, since LDS layers absorb photons of higher energy, it is possible to select luminescent materials whose optical absorption is in the UV region of the solar spectrum.…”

Exploring stability of formamidinium lead trihalide for solar cell application

“…The degradation of MAPbI 3 starts with removal of organic components. H 2 O acts as catalyst rather than reactant in this process [43]:…”

Potential Substitutes for Replacement of Lead in Perovskite Solar Cells: A Review

“…A self‐assembled C 60 monolayer was introduced on TiO 2 surface that enhances the charge separation, reduces the capacitance of TiO 2 and V – I hysteresis . Organic ETM of PC 60 BM or PC 70 BM is more efficient to collect electrons in comparison to mp‐TiO 2 in inverted planar p‐i‐n devices as they can passivate the charge traps of metal oxide and hence can reduce the nonradiative recombination channels at the surface leading to an improved SPCE with a very low hysteresis . The perovskite layer of Cs 3 Sb 2 I 9 was prepared through a single‐step spin‐coating process for an inverted planar p‐i‐n structure using architecture glass/ITO/PEDOT:PSS/Cs 3 Sb 2 I 9 /PC 71 BM/C 60 /bathocuproine (BCP)/Al.…”