Proceedings of International Conference on Perovskite Thin Film Photovoltaics, Photonics and Optoelectronics (ABXPV18PEROPTO)
Publication date: 11th December 2017
We investigate the optical properties of a microcavity containing an organic-inorganic two-dimensional perovskite (2D perovskite) film, (C6H5C2H4NH3)2PbI4. Such 2D perovskites are known to have huge exciton binding energies (200~350 meV [1,2]) with a large oscillator strength. We observed a clear feature of cavity polaritons with a large Rabi splitting (~160 meV) at room temperature. We also observed the strong polariton–polariton interactions compared to that of the inorganic semiconductor microcavities.
We used the general structure of Fabry-Perot type microcavities like the previous work [3,4]. The bottom mirror of our microcavity is dielectric Bragg reflector (DBR) which consists of 5 pairs of TiO2/SiO2 quarter-wavelength layers on the silica glass substrate. Perovskite layer with a thickness of approximately 50 nm was spin-coated on the DBR. In order to achieve a l-cavity, 140 nm α-NPD spacer layer and Ag mirror are deposited over the perovskite layer.
We performed angle-resolved reflectivity (ARR) and angle-resolved photoluminescence (ARPL) measurements for our microcavity at room temperature. From these measurements, we observed the characteristic spectra of cavity polaritons. Furthermore, in our ARPL measurements a complicated energy shift of the lower polaritons was clearly observable as the excitation density increased and its amount reached about 10 meV which is much larger than those observed in the inorganic semiconductor microcavities [5-7]. This large energy shift of our microcavity is possibly caused by the high ratio of the exciton component in the polariton due to its large oscillator strength. Therefore, the 2D perovskite-based microcavity can be considered as a suitable system to investigate the interaction between cavity polaritons.
In our poster, we will discuss the detailed behavior of the interaction between the cavity polaritons and the possibility of achieving the Bose-Einstein condensation in the 2D perovskite-based microcavity.
References
[1] Ishihara, T., Journal of Luminescence, 60–61, 269–274, 1994.
[2] Tanaka, K., and Kondo, T., Science and Technology of Advanced Materials, 4(6), 599–604, 2003.
[3] Lanty, G., and et al., Applied Physics Letters, 93(8), 81101, 2008.
[4] Lanty, G., and et al., New Journal of Physics, 10(65007), 11, 2008.
[5] Sun, Y., and et al., Nature Physics, 13(September), 2015.
[6] Utsunomiya, S., and et al., Nature Physics, 4(9), 2008.
[7] Dang, L. S., and et al., Physical Review Letters, 81(18), 1998.
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.