Broadband plasmonic absorption enhancement of perovskite solar cells with embedded Au@SiO₂@graphene core–shell nanoparticles

Abstract

Although perovskite solar cells have shown outstanding photovoltaic performance, there are still various obstacles that limit their performance and that remain as significant challenges. Weak optical absorption rate in the infrared region is a significant drawback for this kind of solar cell. In this paper, Au@SiO2@Graphene nanoparticles (NPs) as nano-photonic inclusions in the perovskite layer are proposed and investigated theoretically. Unlike conventional nanoparticles, these NPs exhibit strong, multiple plasmon resonances at low energies. The effect of geometrical parameters, periodicity, and the location of the Au@SiO2@Graphene NPs in the perovskite layer upon the performance of the PSCs are investigated. Under improved conditions, an absorption enhancement of 32% is obtained compared to pristine devices. Also, the result attained from coupled optical-electrical simulation of the improved device demonstrated 20.05% power conversion efficiency. These improvements have been achieved due to the plasmonic near-field enhancement effects of Au@SiO2@Graphene nanoparticles along with increased light-scattering from these NPs.

Mechanism and Role of Nanotechnology in Photovoltaic Cells and Applications in Different Industrial Sectors

“…Nanostructured solar cells also used to enhance the light-harvesting capability and increase efficiency. Mesoscopic solar cell composed of different layers fabricated with nanoparticles and non-vacuum processing renders a significant reduction of the fabrication cost [27,32,33].…”

The dawn of MXene duo: revolutionizing perovskite solar cells with MXenes through computational and experimental methods

“…Moreover, the critical attributes of a lengthy carrier diffusion path, low exciton binding energy, and wide absorption coefficient in PSCs are significantly influenced by the quality of advantageous interfacial interactions with the photo-active perovskite, as well as in the charge transfer layers. [8][9][10][11] To address these concerns, various processing methods currently utilise 2D materials in both the perovskite absorbing layer and the charge extraction layers in PSCs. This is done to enhance interface compatibility, significantly improving the morphology and photovoltaic performance of PSCs.…”

Recent progress in use of MXene in perovskite solar cells: for interfacial modification, work-function tuning and additive engineering

“…Furthermore, the main characteristics of a long carrier diffusion length, low exciton binding energy, and broad absorption coefficient in perovskite solar cells are also highly dependent on the quality of beneficial interfacial interactions with the photoactive perovskite as well as in the charge transfer layers. [19][20][21][22] To deal with these issues currently there are many processing approaches in which 2D materials are now employed in the perovskite absorbing layer as well as in the charge extraction layers in PSCs, to improve the compatibility at the interfaces, which has striking impacts on the morphology and photovoltaic performance of the perovskite solar cells. [22][23][24][25][26][27][28][29] Nanomaterials with a thickness of at least one atomic layer are known as two-dimensional (2D) nanomaterials.…”