Abstract
Abstract Dielectric metamaterials with high refractive indices may have an incredible capability to manipulate the phase, amplitude, and polarization of the incident light. Combining the high refractive index and the excellent electrical characteristics of the hybrid organic-inorganic perovskites (HOIPs), for the first time we experimentally demonstrate that metamaterial made of HOIPs can trap visible light and realize effective photon-to-electron conversion. The HOIP metamaterials are fabricated by focused ion beam milling on a solution-grown single-crystalline HOIP film. The optical absorption is significantly enhanced at the visible regime compared to that of the flat HOIP film, which originates from the excited Mie resonances and transverse cavity modes with inhibited interface reflection. Furthermore, compared to the flat film, the HOIP metamaterial shows increased photocurrent of up to ~40%, where the effective photocarrier generation efficiency increases by ~40% and the related internal efficiency by ~20%. Our data point to the potential application of HOIP metamaterials for high-efficiency light trapping and photon-to-electron conversion.
Highlights
Mie resonances in dielectric metamaterials yield strong electric and magnetic resonances and allow substantial control over the light scattering amplitude and phase [1,2,3]
We have experimentally demonstrated that an hybrid organicinorganic perovskites (HOIPs) metamaterial can efficiently trap visible light and realize effective photon-to-electron conversion
The HOIP metamaterial is made of an array of HOIP nanocubes on top of an HOIP layer, which are fabricated by focused ion beam (FIB) milling on a solution-grown single-crystalline HOIP film
Summary
Mie resonances in dielectric metamaterials yield strong electric and magnetic resonances and allow substantial control over the light scattering amplitude and phase [1,2,3]. The optical absorption is significantly enhanced at the visible regime compared to that of the flat HOIP film, which originates from the excited Mie resonances and transverse cavity modes with inhibited interface reflection.
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