Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV16)
Publication date: 28th March 2016
Back-contact concepts are well established in the field of silicon solar cells,where their implementation has resulted in significant efficiency gains, compared to conventional contacting architectures. Charge collection in these devices is typically facilitated by a set of two interdigitated finger electrode arrays, co-located on the backside of the silicon wafer. in this work we use an analogue concept to construct back-contact perovskite solar cells (bc-PSCs). The main advantage of back-contact concepts is that optical transmission losses can be avoided, arising from the top charge colection electrode, which for PSCs typically is a thin conducting oxide (TCO) layer. Here we present an entirely novel quasi-interdigitated electrode design which has not previously been applied to any PV technology. We use this to fabricate the first reported bc-DSCs with charge selective collection electrodes. Characterization of our bc-PSCs with confocal photoluminescence and photocurrent mapping techniques reveals that the photocurrent collection efficiency is most efficient in areas that are in close vicinity to both, the electron and hole collecting electrodes. This suggests that further efficiency improvements can be expected by reducing the typical feature size of the array (pitch) below the 2 microns used for this study.
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International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
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