Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV22)
Publication date: 20th April 2022
We have already witnessed the rapid efficiency rise of 3D MAPI-based perovskite solar cell within just a decade, however, its low stability against moisture, oxygen and heat is still the biggest obstacle for its commercialization. To solve the urgent instability problem, we use 2D layered perovskite with large organic cation intercalating into the inorganic framework, namely benzylammonium or BzA as the organic spacer of Ruddlesden-Popper phase, and 1,4-phenylenedimethanammonium or PDMA in case of Dion-Jacobson phase. The aromatic ring in both spacers has conjugated pi bonds, inducing lower dielectric coefficient mismatch with PbI2, which could facilitate better interlayer charge transport within perovskite, especially for PDMA with narrower interlayer distance and without weak Van der Waals gaps. By increasing the inorganic layer thickness or n value in a stoichiometric way, the bandgap can be reduced, and a trade-off between high stability and efficiency can be achieved.
The efficiency of perovskite solar cell (PSC) is largely determined by the film quality of perovskite layer. The common planar PSC structure is fabricated by sequential spin-coating, during which the crystallization of perovskite is complicated and uncontrolled, although large quantities of work has been done to improve the crystallization process such as hot-casting, solvent engineering, additive doping, etc. In our work, patterned perovskite film is fabricated by imprint lithography. The polymer is first patterned by PDMS stamp and cured under UV light. Then the perovskite precursor is filled into the micrometer-sized trenches. The light absorption in perovskite layer is increased, while the bandgap energy remains the same. The imprint lithography is also applicable to electron transport layer (ETL). Apart from the increased light absorption, the charge transport between perovskite and ETL is also improved, which is ascribed to multi-directional interfacial charge transport due to multi-phase coexisting in 2D layered perovskite, instead of unidirectional vertical charge transport in case of planar 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.