Acceleration of radiative recombination in quasi-2D perovskite films on hyperbolic metamaterials

Abstract

Hyperbolic metamaterials are a family of nanophotonic architectures allowing for the unique control of photonic local density of states. Such a property makes metamaterials prospective to use them with light-emitting objects or to apply as meta-electrodes for optoelectronic devices, where the control of recombination properties plays a decisive role. On the other hand, layered quasi-2D halide perovskites (Ruddlesden–Popper phase) attract high attention due to their low cost, broadband spectral tunability, and outstanding optoelectronic properties. Here, we show how to accelerate photoluminescence with smart engineering of photonic density of states (i.e., via the Purcell effect) by depositing a perovskite film on a hyperbolic metamaterial. We experimentally confirm acceleration of radiative recombination by almost 3 times. This effect can be useful in light-emitting devices, where interplay between radiative and non-radiative channels of charge carrier recombination is crucial.

Multifunctional and Transformative Metaphotonics with Emerging Materials

“…Also, acceleration of perovskite optical response can be achieved by integration with hyperbolic metamaterials because of Purcell factor on their surfaces. 216,274,275 In smart-windows, AR and VR application, it is tempting to use semitransparent light-emitting devices with antireflective properties. In this regard, a very prospective approach was recently demonstrated, which is based on a perovskite metasurface representing nanoparticles with bullet-like shape decreasing the reflectance from 33% to 4% and supporting 15% enhancement of the photoluminescence compared with pristine film.…”

“…Consequently, such materials are characterized by increased radiative recombination rate and photoluminescence quantum yield . Additionally, the charge carrier confinement in quasi-2D perovskites is dependent on the thickness of quantum wells determined by the number of inorganic layers, which allows tuning their emission spectra across the whole optical and near-infrared spectral ranges. − Consequently, quasi-2D perovskites show great promise for applications in optoelectronics. − …”

“…In addition, the observed outstanding properties of the system with ultrasensitive switching could offer the new generation of photonic metadevices with significant benefits. Also, acceleration of perovskite optical response can be achieved by integration with hyperbolic metamaterials because of Purcell factor on their surfaces. ,, …”

Photoluminescence control by hyperbolic metamaterials and metasurfaces: a review

“…Apart from fluorescence dye, quantum dots, and NVCs, nanocrystals of lead halide perovskite, namely CsPbI 3 , were used as emitters placed on top of HMMs to study the enhancement of the Purcell factor 94 . The multilayer HMM contained 6 or 8 periods of Ag (25 nm or 40 nm) and LiF (35 nm or 40 nm) with CsPbI 3 placed on a 10−50 nm thick spacer on top of the HMMs.…”

Generation of Silver Metal Nanocluster Random Lasing

“…The dispersion relation represents the allowed propagation directions and their corresponding wavelengths. Moreover, the photonic density of states (PDOS) increases because the unique hyperbolic unlimited wave vectors (i.e., high- k modes) of the iso-frequency contour in the momentum space. − Once the metal and the dielectric interface is thin and flat, a collective oscillation of electrons called surface plasmon polaritons (SPPs) is confined to the interface. In addition, the high- k modes that emerge from the intercoupling effect of SPPs are realized as the volume plasmon polaritons, resulting in an enhancement of charge-transfer dynamics, an improvement in fluorescence emission, incremented transition rates of optical gain media, and a higher possibility of achieving laser action. , …”