Angular selective backreflector for semitransparent photovoltaics

作者：Dissanayake D M N M; Roberts B; Ku P C^*

来源：Applied Physics Letters, 2012, 101(6): 063302.

DOI：10.1063/1.4742174

A nanoporous anodized aluminum oxide template is used as an incident-angle selective backreflector to lift the transparency vs. light absorption tradeoff in semi-transparent photovoltaics. Light incident at angles greater-than 45 degrees from the template normal is backscattered at greater-than 35% intensity to a semitransparent photovoltaic increasing absorption and photocurrent. Meanwhile, light incident orthogonal to the template is transmitted with minimum attenuation (>85% at 600 nm), limited only by a single-pass absorption within the active layer. Using a vertical semitransparent photovoltaic proposed here, efficient capture of direct sunlight is possible while maintaining transparency at viewing angles close to the substrate normal.

• 出版日期2012-8-6