Journal article
Multi-scale surface texture to improve blue response of nanoporous black silicon solar cells
Applied physics letters, Vol.99(10), 103501
09/06/2011
DOI: 10.1063/1.3636105
Abstract
We characterize the optical and carrier-collection physics of multi-scale textured p-type black Si solar cells with conversion efficiency of 17.1%. The multi-scale texture is achieved by combining density-graded nanoporous layer made by metal-assisted etching with micron-scale pyramid texture. We found that (1) reducing the thickness of nanostructured Si layer improves the short-wavelength spectral response and (2) multi-scale texture permits thinning of the nanostructured layer while maintaining low surface reflection. We have reduced the nanostructured layer thickness by 60% while retaining a solar-spectrum-averaged black Si reflectance of less than 2%. Spectral response at 450 nm has improved from 57% to 71%.
Details
- Title: Subtitle
- Multi-scale surface texture to improve blue response of nanoporous black silicon solar cells
- Creators
- Fatima Toor - National Renewable Energy LaboratoryHoward Branz - National Renewable Energy LaboratoryMatthew Page - National Renewable Energy LaboratoryKim Jones - National Renewable Energy LaboratoryHao-Chih Yuan - National Renewable Energy Laboratory
- Resource Type
- Journal article
- Publication Details
- Applied physics letters, Vol.99(10), 103501
- Publisher
- American Institute of Physics
- DOI
- 10.1063/1.3636105
- ISSN
- 0003-6951
- eISSN
- 1077-3118
- Language
- English
- Date published
- 09/06/2011
- Academic Unit
- Physics and Astronomy; Holden Comprehensive Cancer Center; Electrical and Computer Engineering; Iowa Technology Institute
- Record Identifier
- 9984197070902771
Metrics
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