Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV18)
DOI: https://doi.org/10.29363/nanoge.hopv.2018.065
Publication date: 21st February 2018
Achieving high performance that exceeds the efficiency of CIGS and CdTe, perovskite solar cell is required to ensure high durability for practical applications.1 Although thermal stability of lead halide perovskite materials is determined by their compositions (generally limited to temperature <150oC), stability of device is highly affected by the kind of carrier transport materials and the quality of interfaces at the perovskite junctions. Metal oxide electron transport layers (ETLs) generally have advantage in higher thermal stability than organic ETLs. We have been working with TiO2 ETL-based multi-cation perovskite cells, which yielded efficiency over 21% by ambient air solution processes.2 Intensity dependence of their Voc shows ideality factor low enough (<1.4) for the perovskite device to work as a power source of high output voltage even under weak light.2 Such merit is expected to be applied to space satellite missions, which needs solar cells able to work under very weak sunlight (Mars and Jupiter). We have examined the durability of perovskite solar cells comprising thermally stable FA-based multi-cation perovskite absorber, TiO2 ETL, and P3HT as hole transport layer. This composition exhibited thermally stability at temperature range between －80oC and +100oC. On exposure of the cell to high energy electron and proton beams, we found high stability and tolerance of the perovskite cells in space environment, which are superior to those of Si and GaAs solar cells.3 Focusing on the advantage of lightweight and printable thin film device, future perspectives of perovskite photovoltaic devices will be discussed.
[1] N. -G. Park, M. Gratzel, T. Miyasaka, K. Zhu, and K. Emery, Nat. Energy, 2016, 1, 16152.
[2] T. Singh, T. Miyasaka, et al, Adv. Func. Mat., 2018, DOI: 10.1002/adfm.201706287.
[3] Y. Miyazawa, T. Miyasaka, et al., submitted.
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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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