Performances Enhancement in Perovskite Solar Cells by Incorporating Plasmonic Au NRs@SiO₂ at Absorber/HTL Interface

Abstract

Metallic nanoparticles (NPs) exhibit a surface plasmon resonance (SPR) and can be incorporated into perovskite solar cells (PSCs) to improve cell performance. However, the incorporation of Au NPs in bulk films of PSCs requires large concentration to keep interval distance and would cause worse device performance. In this work, a universal strategy for significant increasing power conversion efficiency (PCE) of PSCs through incorporating high aspect ratio Au nanorods (NRs)@SiO2 into perovskite/spiro‐OMeTAD interface is demonstrated. The key feature of this approach is that we can take advantage of the SPR at a lower concentration and the Au NRs have larger light scattering section than AuNPs. It is found that the SPR and scattering effect of Au NRs lead to a broad enhancement of photon absorption. Furthermore, a superior enhanced charge separation process in the Au NRs incorporated device is also observed. Benefitting from this cooperative plasmonic effect of Au NRs in optical and electrical aspects, both short‐circuit current density and open‐circuit voltage are improved, resulting in the new device delivering a PCE up to 17.39% from 14.39%. This result further supports that Au NRs can play a more effective SPR effect at perovskite/spiro‐OMeTAD interface, rather than incorporating them into bulk films.

UV‐Vis‐NIR‐Driven Plasmonic Photocatalysts with Dual‐Resonance Modes for Synergistically Enhancing H2 Generation

“…However, the solar‐to‐fuels conversion efficiencies of the traditional photocatalysts, such as TiO 2 , CdS, g‐C 3 N 4 , and so forth, are less than satisfactory, mainly owing to the limitations on two major photo‐physical processes, that is, the light absorption and the charge separation . Design and synthesis of plasmonic photocatalysts through controllable wet‐chemical routes have been endowed with great promise to break through the above bottlenecks . In general, plasmonic photocatalysts are composed of noble metal nanostructures and semiconductors, in which the localized surface plasmon resonance (LSPR) of noble metal nanostructures can concentrate and amplify the incident light intensity to sensitize the photo‐physical processes of the contacting semiconductors .…”

Improved Efficiency of Inverted Perovskite Solar Cells Via Surface Plasmon Resonance Effect of Au@PSS Core‐Shell Tetrahedra Nanoparticles

“…Furthermore, Au@SiO 2 nanorods were incorporated by Zhang et al into the interface of perovskite/2,2′,7,7′‐tetrakis‐( N , N ‐di‐ p ‐methoxyphenylamine)‐9,9′‐spiro‐bifluorene (spiro‐OMeTAD), and enhanced the PCE of PSCs from 14.39 to 17.39%, which represents a pretty high improvement factor among reported literatures. The significant performance improvements were ascribed to the enhanced charge separation, light scattering and absorption processes …”

Compositional Engineering of Chloride Ion‐Doped CsPbBr3 Halides for Highly Efficient and Stable All‐Inorganic Perovskite Solar Cells

“…Perovskite solar cells (PSCs) have attracted widespread attention from researchers since their inception due to their remarkable optoelectronic performances and low manufacturing cost. [ 1–4 ] In recent years, with the optimization of materials and the improvement of preparation technology, the record power conversion efficiency (PCE) of mixed organic–inorganic halide lead‐based PSCs has boosted from 3.8% to 25.2%, [ 1–8 ] which is very close to the recording efficiency of traditional silicon solar cells. However, the poor thermal and wet stability of hybrid perovskite because of the volatilization of organic cations and the deliquescence seriously hinders their commercial application.…”