Proceedings of Perovskite Thin Film Photovoltaics (ABXPV16)
Publication date: 14th December 2015
The dependence of the final performance on the morphology and chemistry of the MAPbI3 layer interfaces within the different architectures of the devices and the influence of the ambient conditions is an investigation issue that is under the spot light [[1],[2]]. We investigate the photoluminescence (PL) properties and morphology relationship of prototypical hybrid perovskite CH3NH3PbI3-xClx thin films deposited on different substrates: bare glass, commercial fluorine doped SnO2 (FTO) on glass or compact TiO2 layer on glass/FTO substrates (FTO/TiO2) and compare their properties with crystals (tens of microns in size) obtained dispersing CH3NH3PbI3 in toluene and deposited by spin coating and cured at 90º one hour in N2 ambient. Under 488 nm laser excitation wavelength (0.015 W/cm2), we have observed a PL evolution with irradiation time for all samples which is clearly different from crystals to thin films. For MAPbI3 larger crystals PL intensity increases up to 50 fold after 5 min illumination time and exhibits two bands (at 798 and 770 nm) whose wavelenghts and relative weight also evolves with irradiation time. However, thin films show one band PL spectra peaking at 775 nm previously reported, but the time dependence of the intensity is dependent on the underneath layer. The most intense and stable emission upon laser irradiation corresponds to the glass/FTO/TiO2/MAPbI3-xClx sample, together with the greater life time. XRD analysis reveals that the c-axis is exclusively parallel to the substrate for all films but differences are observed for the one with TiO2 layer. A preliminary Rietveld analysis of the powder sample was also performed for comparison. These observations will be discussed based on results collected from a variety of complementary analytical techniques, including AFM, XRD, micro Raman and photoluminescence studies. We speculate that non-radiative states and disorder are responsible of the structured and weaker emission found in larger crystals that are disabled through a reaction involving light and ambient oxygen.
[1]- Andrea Listorti, Emilio J. Juarez-Perez, Carlos Frontera, Vittoria Roiati,Laura Garcia-Andrade,Silvia Colella, Aurora Rizzo, Pablo Ortiz, Ivan Mora-Sero. Effect of Mesostructured Layer upon Crystalline Properties and Device Performance on Perovskite Solar Cells. J. Phys. Chem. Lett. 2015, 6, 1628−1637.
[2]- YuxiTian, Maximilian Peter, Eva Unger, Mohamed Abdellah, Kaibo Zheng, TõnuPullerits, ArkadyYartsev, VillySundströma and Ivan G. Scheblykin. Mechanistic insights into perovskite photoluminescence enhancement: light curing with oxygen can boost yield thousand fold. Phys. Chem. Chem. Phys., 2015,17, 24978-24987.
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.