Efficient Black Silicon Solar Cell with a Density-Graded Nanoporous Surface: Optical Properties, Performance Limitations, and Design Rules

Hao Chih Yuan, Vernon E. Yost, Matthew R. Page, Paul Stradins, Daniel L. Meier, Howard M. Branz

Research output: Contribution to journalArticlepeer-review

310 Scopus Citations

Abstract

We study optical effects and factors limiting performance of our confirmed 16.8% efficiency "black silicon" solar cells. The cells incorporate density-graded nanoporous surface layers made by a one-step nanoparticle- catalyzed etch and reflect less than 3% of the solar spectrum, with no conventional antireflection coating. The cells are limited by recombination in the nanoporous layer which decreases short-wavelength spectral response. The optimum density-graded layer depth is then a compromise between reflectance reduction and recombination loss. Finally, we propose universal design rules for high-efficiency solar cells based on density-graded surfaces.

Original languageAmerican English
Article numberArticle No. 123501
Number of pages3
JournalApplied Physics Letters
Volume95
Issue number12
DOIs
StatePublished - 2009

NREL Publication Number

  • NREL/JA-520-47065

Keywords

  • black silicon solar cell
  • nanoporous surface

Fingerprint

Dive into the research topics of 'Efficient Black Silicon Solar Cell with a Density-Graded Nanoporous Surface: Optical Properties, Performance Limitations, and Design Rules'. Together they form a unique fingerprint.

Cite this