Proceedings of International Conference on Hybrid and Organic Photovoltaics 2015 (HOPV15)
Publication date: 5th February 2015
Electric fields that build up in a solar cell can affect their absorption spectrum due to Stark effects. In dye-sensitized solar cells (DSC) usually a spectral bleach is found upon photoinduced electron injection. Also in perovskite solar cells (PSC) photoinduced effects are found. Here we will discuss the observed Stark effects in detail and correlate them to electric fields in the solar cell and ion movements.
In the DSC, electrons in mesoporous TiO2 electrodes are charge compensated by cations in the surrounding electrolyte. Upon photoinduced electron injection, the charge compensating cations are initially located outside the dye monolayer, but transient absorption spectroscopy reveals that the Stark bleach slowly disappears (t > 0.1 s). This is attributed to penetration of cations into the dye monolayer.
In MAPbI3 perovskite solar cells a light-induced dipole moment change inside the perovskite film is found, leading to the observation of a Stark effect. Large polarizability of perovskite film in the device under working conditions is responsible for the dipole moment change. Time domain measurements show that dipole moment changes occur on the timescale of seconds, which is comparable to the timescale of hysteresis effects found in the solar cells after light excitation.
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.