Reflection characteristics of porous silicon surfaces

Victor M. Bright; Edward S. Kolesar Jr.; David M. Sowders

doi:10.1117/1.601422

1 April 1997 Reflection characteristics of porous silicon surfaces

Victor M. Bright, Edward S. Kolesar Jr., David M. Sowders

Optical Engineering, Vol. 36, Issue 4, (April 1997). https://doi.org/10.1117/1.601422

Advanced solar cells and other optical detection devices incorporate surface texturing to reduce optical reflection and enhance absorption. Using electrochemical etching techniques, porous silicon surfaces are fabricated. Thin (pore depths less than 1 ?m) and thick (pore depths greater than 5 mm) porous silicon surfaces are optically characterized in terms of their ability to reduce optical reflectance. Three regions of the optical spectrum were investigated: visible (500 to 900 nm), near-IR (1.25 to 2.5 ?m), and mid-IR (2.5 to 12.5 ?m). A highly polished, single-crystal silicon wafer was used as a reference surface. It was determined that thick porous silicon manifested superior results compared to the thin porous silicon, demonstrating a 91% total reflectance reduction in the visible region, a 7% reduction in the near-IR range, and a 53% reduction over the mid-IR wavelengths.

Citation Download Citation

Victor M. Bright, Edward S. Kolesar Jr., and David M. Sowders "Reflection characteristics of porous silicon surfaces," Optical Engineering 36(4), (1 April 1997). https://doi.org/10.1117/1.601422

Published: 1 April 1997

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available