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Title: High performance anti-reflection coatings for broadband multi-junction solar cells

The success of bandgap engineering has made high efficiency broadband multi-junction solar cells possible with photo-response out to the band edge of Ge. Modeling has been conducted which suggests that current double layer anti-reflection coating technology is not adequate for these devices in certain cases. Approaches for the development of higher performance anti-reflection coatings are examined. A new AR coating structure based on the use of Herpin equivalent layers is presented. Optical modeling suggests a decrease in the solar weighted reflectance of over 2.5{percent} absolute as a result. This structure requires no additional optical material development and characterization because no new optical materials are necessary. Experimental results and a sensitivity analysis are presented.
Authors:
Publication Date:
OSTI Identifier:
751469
Report Number(s):
SAND2000-0491J
TRN: AH200018%%224
DOE Contract Number:
AC04-94AL85000
Resource Type:
Journal Article
Resource Relation:
Journal Name: Solar Energy Materials and Solar Cells; Other Information: Submitted to Solar Energy Materials and Solar Cells; PBD: 23 Feb 2000
Research Org:
Sandia National Labs., Albuquerque, NM (US); Sandia National Labs., Livermore, CA (US)
Sponsoring Org:
US Department of Energy (US)
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; SOLAR CELLS; SPECTRALLY SELECTIVE SURFACES; ENERGY EFFICIENCY; SOLAR ENERGY CONVERSION; SENSITIVITY ANALYSIS; ANTIREFLECTION COATING; MULTI-JUNCTION; SOLAR WEIGHTED REFLECTANCE; HERPIN EQUIVALENT LAYERS