Comparison of bioinspired hillock and pit textures for silicon solar cells

Francesco Chiadini, Vincenzo Fiumara, Antonio Scaglione, Akhlesh Lakhtakia

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


Inspired by the apposition compound eyes of some dipterans, we analyzed the effect of texturing the exposed face of a silicon solar cell by ray-tracing simulation. Bioinspired textures of two types were considered: hillock textures and pit textures. A multifrequency analysis-that took into account the broadband nature of solar radiation and its amplitude at the sea-level, as well as the wavelength dependence of the complex-valued refractive index of silicon-showed that both types of bioinspired textures are beneficial. We found that the light-coupling efficiency can be enhanced by as much as 20% and 24% with respect to that of a flat surface when the exposed face of a silicon solar cell is decorated with the bioinspired hillock texture and the bioinspired pit texture, respectively.

Original languageEnglish (US)
Title of host publicationBioinspiration, Biomimetics, and Bioreplication 2014
ISBN (Print)9780819499813
StatePublished - Jan 1 2014
EventBioinspiration, Biomimetics, and Bioreplication 2014 - San Diego, CA, United States
Duration: Mar 10 2014Mar 12 2014

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherBioinspiration, Biomimetics, and Bioreplication 2014
Country/TerritoryUnited States
CitySan Diego, CA

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


Dive into the research topics of 'Comparison of bioinspired hillock and pit textures for silicon solar cells'. Together they form a unique fingerprint.

Cite this