Open AccessLight absorption enhancement in ultrathin perovskite solar cells using light scattering of high-index dielectric nanospheres
Author(s) -
Hyeonwoo Kim,
Hojae Kwak,
Incheol Jung,
Mi Suk Kim,
Jeonghyun Kim,
Hui Joon Park,
KyuTae Lee
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.440989
Subject(s) - materials science , dielectric , optoelectronics , optics , scattering , absorption (acoustics) , light scattering , photoactive layer , plasmonic solar cell , polarization (electrochemistry) , solar cell , refractive index , polymer solar cell , physics , chemistry , composite material
Arrays of high-index dielectric nanoparticles supporting both electrical and magnetic resonances have gained increasing attention for their excellent light-trapping (LT) effects, thus greatly improving the performance of ultrathin solar cells. This work explores front-located, high-index dielectric subwavelength nanosphere arrays as an efficient and broadband LT structure patterned on top of an ultrathin perovskite solar cell (PSC) for a greatly enhanced absorption. Combined strong light scattering and anti-reflection properties achieved by optimized geometrical parameters of the LT structure lead to a broadband absorption enhancement in the ultrathin thickness of a photoactive layer (100 nm) yielding the short-circuit current density (Jsc) of 18.7 mA/cm 2 , which is 31.7% higher than that of a planar counterpart. Moreover, effects of the LT structure on far-field radiation patterns, scattering cross-sections, multipoles' contributions, and asymmetry parameters along with the incidence angle and polarization dependence are investigated. The present strategy could be applied to diverse applications, such as other ultrathin or semitransparent solar cells, absorbers and photodetectors.