Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Publication date: 1st March 2014
In this work we report an experimental analysis of the performance of photonic crystal based dye solar cells (PCDSCs) as the incident light angle moves away from the normal with respect to the cell surface. Nanoparticle multilayers operating at different wavelength ranges were coupled to the TiO2 working electrode of a dye sensitized solar cell for this study. These photonic structures are well-know because their capability to enhance to efficiency of the cell without losing the transparency of the system. [1] The interplay between optical and photovoltaic properties with the incident light angle is discussed. We demonstrate that an efficiency enhancement is attained for PC-DSCs at all angles measured, and that rational design of the photonic crystal back mirror leads to a reduction of the photocurrent losses related to the tilt angle of the cell, usually labeled as cosine losses. Angular variations of the cell transparency are also reported and discussed. These angular properties are relevant to the application of these solar devices in building integrated photovoltaics as potential window modules.[2]
Incident photon to collected electron (IPCE) efficiency measured for a reference cell (grey solid line) and DSCs made of nc-TiO2 electrodes coupled to different highly porous 1DPCs, namely, DSC-B (blue dashed line), DSC-G (green dotted line) and DSC-R (orange dash-dotted line) at (A) 0 and (B) 50 degrees. (C) IPCE enhancement at different tilt angles for the device DSC-R, from 0 degrees (red solid line) to 50 degrees (black solid line). The red dashed line indicates the maximum absorption of the N719 dye.
[1] Colodrero, S. et al. Efficient Transparent Thin Dye Solar Cells Based on Highly Porous 1D Photonic Crystals. Adv. Funct. Mater. 2012, 22, 1303. [2] López-López, C. et al.Angular response of photonic crystal based dye sensitized solar cells. Energy Environ. Sci. 2013, 6, 1260–1266.
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