Above-11%-efficiency organic-inorganic hybrid solar cells with omnidirectional harvesting characteristics by employing hierarchical photon-trapping structures

Wan Rou Wei, Meng Lin Tsai, Shu Te Ho, Shih Hsiang Tai, Cherng Rong Ho, Shin Hung Tsai, Chee Wee Liu, Ren Jei Chung, Jr-Hau He*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

146 Scopus citations

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 languageEnglish (US)
Pages (from-to)3658-3663
Number of pages6
JournalNano Letters
Volume13
Issue number8
DOIs
StatePublished - Aug 14 2013

Keywords

  • Hybrid solar cells
  • Si
  • heterojunction
  • omnidirectionality
  • pγhoton management

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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