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.
Original language | English (US) |
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Pages (from-to) | 3658-3663 |
Number of pages | 6 |
Journal | Nano Letters |
Volume | 13 |
Issue number | 8 |
DOIs | |
State | Published - Aug 14 2013 |
Externally published | Yes |
Keywords
- Hybrid solar cells
- Si
- heterojunction
- omnidirectionality
- pγhoton management
ASJC Scopus subject areas
- Bioengineering
- General Chemistry
- General Materials Science
- Condensed Matter Physics
- Mechanical Engineering