We report on development of flexible PCPDTBT:PCBM solar cells with integrated diffraction gratings on the bottom electrodes. The presented results address PCPDTBT:PCBM solar cells in an inverted geometry, which contains implemented grating structures whose pitch is tuned to match the absorption spectra of the active layer. This optimized solar cell structure leads to an enhanced absorption in the active layer and thus improved short-circuit currents and power conversion efficiencies in the fabricated devices. Fabrication of the solar cells on thin polyimide substrates which are compatible with the lithographically processed grating structures are done in order to obtain the efficiency enhancement in thin, flexible devices.

Date Published: 17 October 2013
PDF: 7 pages
Proc. SPIE 8830, Organic Photovoltaics XIV, 883021 (17 October 2013); doi: 10.1117/12.2023999

Published in SPIE Proceedings Vol. 8830:
Organic Photovoltaics XIV
Zakya H. Kafafi; Paul A. Lane, Editor(s)