Proceedings of International Conference Asia-Pacific Hybrid and Organic Photovoltaics (AP-HOPV17)
Publication date: 7th November 2016
Perovskite solar cells using methyl ammonium lead triiodide (CH3NH3PbI3) perovskite as a photoabsorber have attracted much attention as promising next-generation highly efficient solar cells. The performance of perovskite solar cells is known to highly depend on the quality of the perovskite layer. Among several methods for fabrication of perovskite layer, we focused on a one-step solution method, in which perovskite film is formed by spin-coating a mixed solution of CH3NH3I and PbI2 in DMSO or DMF with toluene treatment, followed by annealing. In this process, the transparent film is formed after spin-coating, which immediately colorizes to black corresponding to perovskite upon annealing at ~100 ℃. We focused on transparent intermediate and succeeded in isolation of these crystals. X-ray structural analysis revealed that the intermediate crystals prepared from DMSO or DMF solution correspond to MA2Pb3I8∙2DMSO or MA2Pb3I8∙2DMF as composition formula, respectively, both of which contain intercalated solvent molecules. Thermogravimetric analysis on these crystals indicates that the intercalated solvent molecules come out from the intermediate at ~78 ℃ to become black solids. Based on these characteristics of the intermediates, we optimized our device fabrication method to achieve high power conversion efficiency (~20.3%) with high reproducibility, even in the cells using a pure CH3NH3PbI3 perovskite photoabsorber. In this presentation, the details of the properties of the intermediates as well as our fabrication process will be introduced.
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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
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.