Open AccessResonance-induced absorption enhancement in colloidal quantum dot solar cells using nanostructured electrodes
Author(s) -
Seyed Milad Mahpeykar,
Qiuyang Xiong,
Xihua Wang
Publication year - 2014
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.0a1576
Subject(s) - materials science , optoelectronics , finite difference time domain method , quantum dot , indium tin oxide , optics , guided mode resonance , absorption (acoustics) , polarization (electrochemistry) , diffraction grating , grating , diffraction , layer (electronics) , nanotechnology , chemistry , physics , composite material
The application of nanostructured indium-doped tin oxide (ITO) electrodes as diffraction gratings for light absorption enhancement in colloidal quantum dot solar cells is numerically investigated using finite-difference time-domain (FDTD) simulation. Resonant coupling of the incident diffracted light with supported waveguide modes in light absorbing layer at particular wavelengths predicted by grating far-field projection analysis is shown to provide superior near-infrared light trapping for nanostructured devices as compared to the planar structure. Among various technologically feasible nanostructures, the two-dimensional nano-branch array is demonstrated as the most promising polarization-independent structure and proved to be able to maintain its performance despite structural imperfections common in fabrication.