Proceedings of International Conference Asia-Pacific Hybrid and Organic Photovoltaics (AP-HOPV17)
Publication date: 7th November 2016
Ultrasonic spray coating is a promising pathway to scaling-up of perovskite solar cell production because it can be applied on scales from < 1 cm2 laboratory samples to continuous roll-to-roll production. The capability to optimize a scalable process in under laboratory conditions is particularly important because of dramatically lower cost of process development with table-top machines rather than large-scale industrial equipment. Several groups have demonstrated fabrication of perovskite solar cells by ultrasonic spray coating, however the publications so far included only machine-specific parameters required to achieve optimal performance. Due to its inherent scalability, design of ultrasonic spray systems varies considerably, and settings on one machine are not necessarily meaningful on another. Even environmental factors and coated substrate area may considerably affect processing conditions and film quality for the same type of spray coating machine.
To identify machine-independent parameters that determine film quality, we demonstrate that spray-coated wet-film thickness and evaporation rate strongly correlate with dry film morphology and large-scale uniformity. To realize machine-independent process characterization, we demonstrate a system for in-situ measurement of wet film thickness and evaporation rate immediately after spray coating. We further demonstrate that with limited data, modeling can be used to compute wet film evaporation rate under conditions where in-situ measurement is not practical. Monitoring wet film evaporation rate and thickness parameters directly would allow a process to be replicated between laboratories or manufacturing sites without the need for extensive re-optimization. Furthermore, we demonstrate that the PbI2 films that were fabricated by the optimized process are suitable for high-performance perovskite solar cell fabrication under ambient conditions. Solar cells and modules are demonstrated with device active area between 1 cm2 and 2 cm2 and PCE up to 13% with negligible hysteresis.
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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.