Wide-Angle and Polarization-Insensitive Perfect Absorber for Organic Photovoltaic Layers

Abstract

In this letter, we computationally explore a wideangle and polarization-insensitive perfect absorber based on hybrid metal-dielectric-metal structures. By introducing an organic photovoltaic layer between top metallic nanopatterns and a continuous metal bottom plate, an enhanced angle-and polarization-insensitive absorption can be obtained in the spectral range 400-700 nm, which is promising to realize improved thinfilm organic photovoltaic devices. The physical mechanism of the perfect absorber is explained theoretically and numerically by the critical coupling principle.

Coupled and decoupled super absorbing metasurfaces depending on spacer thickness

“…l(b)). According to our previous report [3], super absorption over 99% can be obtained based on these top nanoparticles. Here we explore the peak tunability by changing the spacer thickness.…”

“…Particularly, for those energy harvesting applications, it is essential to realize the spectral tunability of the resonant absorption band to maximize the overlap between the structurally enhanced absorption band with the intrinsic absorption profile of energy harvesting materials [3]. It has been demonstrated that the plasmonic resonance peak of three-layered super/perfect absorbers show strong dependence on the lateral dimension of top metallic nanopatterns.…”

Semiconductor Thin Film Based Metasurfaces and Metamaterials for Photovoltaic and Photoelectrochemical Water Splitting Applications

“…Similarly, a broadband GSP resonator was designed for PV applications using metal dewetting process which is a large scale compatible route . The effectiveness of this approach is not limited to semiconductors, but also thin organic coatings and dye molecules can also benefit from this strategy . Chikkaraddy et al demonstrated single‐molecule strong coupling at room temperature in plasmonic nanocavities gap .…”

“…They claimed that the strong interaction among particles and their image results in a dimer‐like construct with hot spots having an amplitude enhancement as large as three order of magnitudes. Moreover, a 40 nm thick P3HT:PC 60 BM organic layer sandwiched between Al thick mirror and top Al nanopatches can offer broadband light absorption covering the whole visible range (400–700 nm) . This was further approved in a complete solar cell where the use of taper Ag nanoantennas has coupled the incident light into the bulk of active layer .…”

Optically enhanced semi-transparent organic solar cells through hybrid metal/nanoparticle/dielectric nanostructure

“…Another potential solution is the plasmonic effect of metal nanomaterials and nanostructures, which is emerging as an excellent tool to enhance light harvesting by its highly confined near field distribution [26][27][28][29][30][31][32][33][34]. For st-OSCs, the incorporation of metal nanomaterials into device would increase some degree of surface roughness, it would bring difficulties to form high quality and uniform ultra-thin metal film, leading to poor electrical properties and thus hindering to achieve high efficiency of st-OSCs [15,20,35].…”