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Automated spray coating process for the fabrication of large-area artificial opals on textured substrates

: Sprafke, A.N.; Schneevoigt, D.; Seidel, S.; Schweizer, S.L.; Wehrspohn, R.B.

Fulltext urn:nbn:de:0011-n-2545245 (3.3 MByte PDF)
MD5 Fingerprint: e01939a8201bbc325bba8cb80bf970ff
Created on: 27.11.2014

Optics Express 21 (2013), Supplement 3, pp.A528-A538
ISSN: 1094-4087
Journal Article, Electronic Publication
Fraunhofer IWM ( IMWS) ()

3D photonic crystals, such as opals, have been shown to have a high potential to increase the efficiency of solar cells by enabling advanced light management concepts. However, methods which comply with the demands of the photovoltaic industry for integration of these structures, i. e. the fabrication in a low-cost, fast, and large-scale manner, are missing up to now. In this work, we present the spray coating of a colloidal suspension on textured substrates and subsequent drying. We fabricated opaline films of much larger lateral dimensions and in much shorter times than what is possible using conventional opal fabrication methods.