Environmental effectson the photophysics of CH3NH3PbI3

Mauricio E. Calvo^a, Miguel Anaya^a, Juan F. Galisteo-López^a, Hernán Míguez^a

^aInstituto de Ciencia de Materiales de Sevilla (ICMS), Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Sevilla, C/ Américo Vespucio 49, Sevilla, Spain

nanoGe Perovskite Conferences
Proceedings of Perovskite Thin Film Photovoltaics (ABXPV16)

Barcelona, Spain, 2016 March 3rd - 4th

Organizers: Emilio Palomares and Nam-Gyu Park

Oral, Juan F. Galisteo-López, presentation 037
Publication date: 14th December 2015

Third generation photovoltaics have witnessed the irruption of hybrid organic-inorganic perovskites as an unrivalled light harvester.[1] The rapidly achieved breakthroughs, comprising devices with high power conversion efficiencies, are beginning to be accompanied by fundamental studies necessary for turning the current rush into a mature technology. Research efforts aiming at a better understanding of the electrical, structural and photophysical properties of thismaterialare of utmost importance,as they will bridge the gap between the as-prepared material and realistic marketable devices with excellent performances. In this work we present an in-depth analysis regarding the photophysical properties of the methylammonium lead tri-iodide perovskite (CH3NH3PbI3) as a tool for understanding its performance under different environmental conditions. Beyond its use as a tool to study several aspects of CH3NH3PbI3, such as carrier recombination kinetics [2] or the crystallization of the material [3],photophysics have proved fundamental in understanding how the material interacts with its environment under device operation conditions. We have identified two different reversible processes in the form of photoinduced activation and darkening of the photoluminescence, extremely dependent on the atmosphere where the films are placed.[4] We resolve the role of oxygen and moisture in the photoactivation and photodarkening, respectively. Indeed, oxygen is revealed as decisive for the emission recovery after a fatigue of the PLin perovskite films. Our resultsthus tackle aspects of the physical properties of CH3NH3PbI3which strongly determine their performance. The extracted conclusions provide insights which allow bringingthis material closer to technological applications.

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.

MATSUS

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.

International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics

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.