Above-11%-efficiency organic-inorganic hybrid solar cells with omnidirectional harvesting characteristics by employing hierarchical photon-trapping structures
Journal
Nano Letters
Journal Volume
13
Journal Issue
8
Pages
3658-3663
Date Issued
2013
Author(s)
Wei, W.-R.
Tsai, M.-L.
Ho, S.-T.
Tai, S.-H.
Ho, C.-R.
Tsai, S.-H.
Liu, C.-W.
Chung, R.-J.
He, J.-H.
Abstract
Hierarchical structures consisting of micropyramids and nanowires are used in Si/PEDOT:PSS hybrid solar cells to achieve a power conversion efficiency (PCE) up to 11.48% with excellent omnidirectionality. The structure provides a combined concepts of superior light trapping ability, significant increase of p-n junction areas, and short carrier diffusion distance, improving the photovoltaic characteristics including short-circuit current density, fill factor, and PCE. The enhancement of power generation is up to 253.8% at high incident angles, showing the outstanding omnidirectional operation ability of hybrid cells with hierarchical Si surfaces. This properly designed hierarchical-structured device paves a promising way for developing low-cost, high-efficiency, and omnidirectional solar applications in the future. © 2013 American Chemical Society.
Subjects
heterojunction; Hybrid solar cells; omnidirectionality; pγhoton management; Si
SDGs
Other Subjects
Carrier diffusions; Hierarchical structures; Hybrid solar cells; Omnidirectionality; Organic-inorganic hybrid; Photovoltaic characteristics; Power conversion efficiencies; Solar applications; Heterojunctions; Nanowires; Silicon; Tracking (position); Solar cells
Type
journal article