Proceedings of International Conference on Perovskite Thin Film Photovoltaics, Photonics and Optoelectronics (ABXPV18PEROPTO)
Publication date: 11th December 2017
Three-dimensional perovskite compound, MAPbI3, consisting of methylamine (MA) and lead iodide has been applied to a light absorber of solar cells because of wide range of light absorption and long carrier diffusion length. However, the low stability of MAPbI3 against moisture and heat should be improved. In this study, we focused on acetamidinium (AA) cation and introduced to MAPbI3 perovskite to identify the effect on the photovoltaic properties and its stability.
Precursor solution of MA0.85AA0.15PbI3 was prepared by mixing MAPbI3 and AAPbI3 precursor solutions at certain volume ratio. A MA0.85AA0.15PbI3 film was prepared by using the anti-solvent method with chlorobenzene. The structure and optical properties of a MA0.85AA0.15PbI3 film were investigated by X-ray diffraction (XRD) measurements and UV-vis absorption spectroscopy. Perovskite solar cells using MA0.85AA0.15PbI3 as a light absorption layer were fabricated to conduct power generation tests.
From the XRD measurements of a MA0.85AA0.15PbI3 film, strong peak at 14.1 º attributed to α-phase of MAPbI3 and small peak at 11.4 º attributed to δ-phase of AAPbI3 were observed. The existence ratio of α-phase of MAPbI3 calculated by integral intensity ratio of the peaks at 14.1 º and 11.4 º was 97.8%, which was higher than the preparation ratio. This indicated that AA cation can be incorporated into α-phase of MAPbI3 because both of perovskites has similar surface free energy. Furthermore, the d-spacing value of α-phase became larger than that of pure MAPbI3 film. This indicated that the introduction of AA cation to MAPbI3 expanded the lattice size of α-phase. From UV-vis absorption measurements, the range of light absorption of the MA0.85AA0.15PbI3 film was a few nm wider than that of pure MAPbI3 film. The power conversion efficiency (PCE) of perovskite solar cells using a MA0.85AA0.15PbI3 layer as a light absorber layer showed the highest performance (PCE: 14.6%), about 3% higher than that of using a MAPbI3 film (11.7%).
(302 words)
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
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
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.