Proceedings of International Conference Asia-Pacific Hybrid and Organic Photovoltaics (AP-HOPV17)
Publication date: 7th November 2016
Formamidinium lead iodide perovskite (FAPbI3; FA+ = HC(NH2)2+) single crystal with a bandgap of ~1.4 eV has attracted much attention as a new class of absorption layers of solar cell. We investigated various electrical and optical properties of FAPbI3 single crystal, which was made by inverse temperature crystallization method.
Dark current – voltage measurement was carried out, and hole mobility and hole trap density were estimated by the space-charge-limited current technique. Temperature dependence of resistance with and without light irradiation indicated the existence of two activation energies.
Absorption coefficient of a slice of single crystal was calculated from the transmittance and reflectance data, and optical bandgap of the inside of a crystal was estimated. On the other hand, the transmittance measurement of the powder milled from a single crystal showed a different optical bandgap. It is coincided with the results which a photo-luminescence spectrum of a single crystal showed two peaks. The origins of bandgap and activation energy will be discussed.
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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.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
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