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Improved flexible thin-film solar cells with nanoimprinted light management textures

: Wilken, K.; Paetzold, U.W.; Meier, M.; Prager, N.; Fahland, M.; Finger, F.; Smirnov, V.


Institute of Electrical and Electronics Engineers -IEEE-; IEEE Photonics Society:
IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015 : 14-19 June 2015, New Orleans, LA
Piscataway, NJ: IEEE, 2015
ISBN: 978-1-4799-7944-8
Photovoltaic Specialists Conference (PVSC) <42, 2015, New Orleans/La.>
Conference Paper
Fraunhofer FEP ()

A nanoimprint based approach to achieve efficient light management for solar cells on low temperature transparent polymer (PET) films is presented. The imprint-textured PET substrates show excellent light scattering properties and lead to significantly improved incoupling and trapping of the light in the solar cell, resulting in a current density of 12.9 mA/cm(2), similar to that on a glass substrate with texture-etched ZnO: Al and only 0.2 mA/cm(2) lower than that on Asahi(U)-type TCO glass. An efficiency of 6.9 % was achieved for a flexible thin-film silicon solar cell on low cost transparent PET substrate.