NDLI: Si microwire-array solar cells

Content Provider	Royal Society of Chemistry (RSC)
Author	Putnam, Morgan C. Boettcher, Shannon W. Turner-Evans, Daniel B. Warren, Emily L. Lewis, Nathan S. Briggs, Ryan M. Atwater, Harry A. Kelzenberg, Michael D. Spurgeon, Joshua M.
Copyright Year	2010
Abstract	Si microwire-array solar cells with Air Mass 1.5 Global conversion efficiencies of up to 7.9% have been fabricated using an active volume of Si equivalent to a 4 μm thick Si wafer. These solar cells exhibited open-circuit voltages of 500 mV, short-circuit current densities (Jsc) of up to 24 mA cm-2, and fill factors >65% and employed Al2O3 dielectric particles that scattered light incident in the space between the wires, a Ag back reflector that prevented the escape of incident illumination from the back surface of the solar cell, and an a-SiNx:H passivation/anti-reflection layer. Wire-array solar cells without some or all of these design features were also fabricated to demonstrate the importance of the light-trapping elements in achieving a high Jsc. Scanning photocurrent microscopy images of the microwire-array solar cells revealed that the higher Jsc of the most advanced cell design resulted from an increased absorption of light incident in the space between the wires. Spectral response measurements further revealed that solar cells with light-trapping elements exhibited improved red and infrared response, as compared to solar cells without light-trapping elements.
Starting Page	1037
Ending Page	1041
Page Count	5
File Format	HTM / HTML PDF
ISSN	17545692
Volume Number	3
Issue Number	8
Journal	Energy & Environmental Science
DOI	10.1039/c0ee00014k
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Micrometre Wafer Dielectric Solar cell Passivation (chemistry) Photocurrent Infrared
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution Renewable Energy, Sustainability and the Environment Nuclear Energy and Engineering

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