Black silicon solar cells with black bus-bar strings

Rasmus Schmidt Davidsen, Peter Torben Tang, Io Mizushima, Sune Thorsteinsson, Peter Behrensdorff Poulsen, Jesper Frausig, Ørnulf Nordseth, Ole Hansen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


We present the combination of black silicon texturing and blackened bus-bar strings as a potential method for obtaining all-black solar panels, while using conventional, front-contacted solar cells. Black silicon was realized by maskless reactive ion etching resulting in total, average reflectance below 0.5% across a 156x156 mm2 silicon wafer. Four different methods to obtain blackened bus-bar strings were compared with respect to reflectance, and two of these methods (i.e., oxidized copper and etched solder) were used to fabricate functional allblack solar 9-cell panels. The black bus-bars (e.g., by oxidized copper) have a reflectance below 3% in the entire visible wavelength range. The combination of black silicon cells and blackened bus-bars results in aesthetic, all-black panels based on conventional, front-contacted solar cells without compromising efficiency.
Original languageEnglish
Title of host publicationProceedings of 43rd IEEE Photovoltaic Specialists Conference
Number of pages4
Publication date2016
Article number7750183
Publication statusPublished - 2016
Event2016 IEEE 43rd Photovoltaic Specialists Conference - Oregon Convention Center, Portland, United States
Duration: 5 Jun 201610 Jun 2016
Conference number: 43


Conference2016 IEEE 43rd Photovoltaic Specialists Conference
LocationOregon Convention Center
Country/TerritoryUnited States
Internet address


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