Fluorescence Enhancement of Metal-Capped Perovskite CH ₃ NH ₃ PbI ₃ Thin Films

Abstract

We fabricate nano-structural metal films to improve photoluminescence of perovskite films. When the perovskite film is placed on an ammonia-treated alumina film, stronger photoluminescence is found due to local field enhancement effects. In addition, the oxide spacer layer between the metal (e.g., Al, Ag and Au) substrate and the perovskite film plays an important role. The simulations and experiments imply that the enhancement is related to surface plasmons of nano-structural metals.

The structural, electronic, and optical properties of organic–inorganic mixed halide perovskites CH 3 NH 3 Pb(I 1− y X y ) 3 (

“…Organic-inorganic perovskites based on the metal hybrids solar cells have attracted wide photovoltaic research due to its flexibility, easy manufacture, lowcost and high optical absorption efficiency to scientific and industrial applications. [25][26][27][28][29][30][31][32][33][34][35][36] For the novel organic-inorganic perovskite materials, many efforts have been devoted to the replacement of A + , B 2+ , and X − by other ions to exploring their outstanding performance. [2,27] The hybrid organic-inorganic perovskites show excellent optical properties in recent experimental measurements and theoretical calculations.…”

Improved exciton photoluminescence of Zn-doped quasi-2D perovskite nanocrystals and their application as luminescent materials in light-emitting devices

“…8c) illustrate that the PL intensity of the Zn-doped NCs film is significantly enhanced after the deposition of the Al film, and the PL emission performance of different n phases is improved in different degrees due to the near-field surface plasmon resonance effect at the interface between the perovskite NCs and the Al thin films. 67 The excitation power-dependent (0.1–2.5 mW) PL spectra of NCs films with and without Al are presented in Fig. 8d, which clearly reveals the evolution of the emission band of n = 1–4 phases and the 3D perovskite.…”

“…70 The LSPR enhances the electric field around Al nanoparticles, resulting in the increased local density of photonic states, and thus the accelerated radiative transition rate of excitons can improve the fluorescence emission of Q-2D perovskite materials. 44,45,67 TRPL measurements were performed on the Zn-doped NCs film and Zn-doped NCs/Al composite film. As shown in Fig.…”

High, Multiple, and Nonvolatile Polarizations in Organic–Inorganic Hybrid [(CH3)3(CH2CH2Cl)N]2InCl5·H2O for Memcapacitor

“…From the perspective of facilitating ion migration, a variety of ionic conductors with small ionic radii such as proton (H + ), Li + , or Na + serve as candidates. − Among them, the proton stands out as the most attractive candidate due to its small size and its propensity to not form harmful metal dendrites that may block the migration pathways. Organic–inorganic metal halide hybrids are a new class of functional materials that usually consist of a relatively rigid inorganic framework and flexible organic motifs residing inside voids of the framework. − This structural feature allows a large structural tolerance and relatively weak interactions between anions and cations compared with pure organic or inorganic materials, providing ample space for long-range proton migration. Among these, the polyhedron with indium as central ions and halogen and water molecules as ligands [In X m (H 2 O) n , X = halogen anions, m + n = 6] are well known and have been extensively studied.…”