Proceedings of International Conference on Perovskite and Organic Photovoltaics and Optoelectronics (IPEROP19)
DOI: https://doi.org/10.29363/nanoge.iperop.2019.051
Publication date: 23rd October 2018
Recently, metal halide perovskite semiconductors are being intensively studied with respect to both fundamental physics and implementation in solution-processed functional devices. While solution-grown bulk single crystals have been employed to reveal the intrinsic optical properties of perovskites [1-4], colloidal synthesis promises further technological advances since this enables preparation of novel perovskite nanocrystals, combining excellent optoelectronic properties with quantum confinement effects. The highly efficient luminescence of the perovskite nanocrystals has a narrow bandwidth and its wavelength can be tuned over the entire visible spectrum. These properties make them particular interesting for display phosphors, light-emitting diodes, lasers, and single photon sources. The successful design of such new optoelectronic devices depends on the detailed knowledge about excitons and excitonic complexes in the nanocrystals. Here, we report on the optical responses of organic-inorganic hybrid and all-inorganic perovskite nanocrystals. Their luminescence quantum yields and the lifetimes of excitons, charged excitons, and biexcitons [5-7] were evaluated by employing femtosecond transient-absorption and single-dot spectroscopy [8-10]. It is shown that both nonradiative Auger ionization and charged surface defects can contribute to the charged exciton generation in perovskite nanocrystals. We discuss the photophysics of the charged excitons, because they determine the device performance of nanocrystal-based light emitters.
The author would like to thank many colleagues for their contributions and discussions. Part of this work was supported by JST-CREST (Grant No. JPMJCR16N3).
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
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.