Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Publication date: 1st March 2014
Most literature in the rapidly expanding area of hybrid perovskite solar cells focuses on the efficiency of devices, with little attention being paid to the critical issue of device stability. We have successfully fabricated a device with the architecture FTO/d-TiO2/mp-TiO2/MAPI/spiro-OMeTAD/Au and exposed it to 43 sun-equivalent constant illumination for 63 hours. This continuous illumination delivers over 2700 hours equivalent of 1 sun photo-excitations. With a loss of only 8% in Jsc and 180mV in Voc at 43 SE illumination and only 7% in Jsc and 190mV at 1 sun, this gives insight into the viability of the technology on practical timescales. We have also found in the given architecture that the presence of UV light causes significantly faster degradation to cell performance. Moreover, we have investigated the effect of different components on the stability of devices, changing the hole blocking layer, active layer and the hole transport material, for example P3HT and DPPTTT were found to be less stable than PCDBDT when comparing polymers. The stability of devices at different oxygen and humidity exposure during and after fabrication has also been investigated.
Photocurrent vs time of a TiO2/MAPI/OMeTAD cell for the same cell under 40 SE illumination for 63 hours. Gaps correspond to short periods where the cell was at open circuit under illumination. Inset shows initial, maximum, and final JVs. Illumination from the Luxim lamp with a 420 nm cutoff filter.
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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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