Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV18)
Publication date: 21st February 2018
The rise of the perovskite solar cells (PSC) within the last years has been accompanied with many different and novel absorber compositions and recipes with promising results for many of them. Furthermore, various cell architectures exist, including a variety of used substrates, electron and hole transporting layers. Nevertheless, there is still room for improvement regarding e.g. the performance and long-term stability or the hysteretic behaviour of several types of PSCs.
To achieve further progress and a more profound understanding of the PSCs, deeper analysis is needed. Time-of-flight secondary ion mass spectrometry (ToF-SIMS) can be a powerful tool concerning the open questions. Besides the very good detection limit of some elements and molecules with ToF-SIMS, depth profiling delivers also valuable information about the distribution of the elements within the layer stack.
At ZSW we have the possibility to use four different sputter sources in our ToF-SIMS setup, which allows us to choose the optimal parameters regarding the questions to be dealt with. Especially the cluster sources (several hundred or more atoms in a cluster) enable the addressing of perovskite specific questions. With the argon cluster source e.g., the fragmentation of the molecules is minimal. Therefore, elements as well as compounds (as e.g. methyl ammonium) can be detected. In addition, the oxygen cluster source allows an improved measurement of the alkaline metals, which play an important role in recently developed recipes without driving them into deeper layers during depth profiling.
In this work we show ToF-SIMS depth profiles of inverted and standard cell architectures with different perovskite absorbers (e.g. lead acetate route or multiple cation recipes). ToF-SIMS reveals gradients of some of the absorber components in the depth profiles and can thereby help to explain the behavior of the complete solar cells and contribute to a better understanding of PSC.
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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.