Large area imprinted surface textures for omnidirectional conformal AR coatings on flexible amorphous silicon solar cells

Arvinder Singh Chadha, Eric D. Cline, Meng Tao, Weidong Zhou

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Inverted pyramid surface textures are demonstrated on flexible amorphous Si solar cells based on a resin imprint process. The surface texture reduces the reflectivity of the cells over a broad spectrum. The texture leads to relative cell efficiency increases from 7% at 0°(surface-normal incident) to as high as 22% at 60°. Larger efficiency improvement at higher incident angles is a result of the broad spectrum omni-directional suppression in reflection. The current-voltage characteristics show that the open circuit voltage remains almost constant but the surface texture increases the short circuit current in the amorphous Si solar cell. This suggests that the efficiency improvement is primarily due to improved coupling of light into the cell. This omnidirectional surface texture is a promising method for anti-reflection in all kinds of cells-crystalline Si, amorphous Si, thin films, and organic solar cells.

Original languageEnglish (US)
Title of host publicationProgram - 38th IEEE Photovoltaic Specialists Conference, PVSC 2012
Pages327-330
Number of pages4
DOIs
StatePublished - Nov 26 2012
Event38th IEEE Photovoltaic Specialists Conference, PVSC 2012 - Austin, TX, United States
Duration: Jun 3 2012Jun 8 2012

Publication series

NameConference Record of the IEEE Photovoltaic Specialists Conference
ISSN (Print)0160-8371

Other

Other38th IEEE Photovoltaic Specialists Conference, PVSC 2012
CountryUnited States
CityAustin, TX
Period6/3/126/8/12

Keywords

  • amorphous silicon
  • flexible solar cell
  • inverted pyramid
  • large area
  • omnidirectional
  • surface texturing

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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  • Cite this

    Chadha, A. S., Cline, E. D., Tao, M., & Zhou, W. (2012). Large area imprinted surface textures for omnidirectional conformal AR coatings on flexible amorphous silicon solar cells. In Program - 38th IEEE Photovoltaic Specialists Conference, PVSC 2012 (pp. 327-330). [6317628] (Conference Record of the IEEE Photovoltaic Specialists Conference). https://doi.org/10.1109/PVSC.2012.6317628