Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV18)
Publication date: 21st February 2018
Here, we present highly efficient perovskite solar cells fabricated with a hybrid evaporation-spincoating method, where the PbI2 inorganic part is first deposited by vacuum thermal evaporation and then converted into perovskite by spincoating of the MAI (CH3NH3I) organic component. Additionally, we addressed the issue of ''Interface Engineering'' at the perovskite top and bottom interfaces. Implementing a single or a bilayer charge transport layer and variation of layer thicknesses lead to improvements in the perovskite crystallization and thereupon both electron and hole charge transportation quality. Utilizing a standard n-i-p cell structure, a 18.2% stabilized and highly reproducible efficiency for a MAPbI3 layer sandwiched between a TiO2/PCBM electron transport bilayer (ETL) and a Spiro-MeOTAD hole transport layer has been achieved. As ETL, a 30 nm thick evaporated TiO2 layer coated by a 3000 rpm spun PCBM layer yielded the optimum performance. In combination, a 250 nm (2000 rpm spun) Spiro-MeOTAD layer enabled a cell performance of 18.2% due to the compact and complete coverage of the perovskite. The measurements have done on a solar cell with 0.16 cm2 active area and under one sun illumination at 43 mV/s scan speed. The microscopic analysis shows a highly crystalized perovskite layer as well as a compact and uniform coverage of the charge transport layers. Furthermore, a faster decay visible in the time resolved photoluminescence for the optimized interfaces indicates the improvement of charge extraction obtained by the interface engineering.
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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.
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