Publication date: 10th April 2024
Photovoltaic (PV) conversion, as an eco-friendly energy solution to contemporary challenges, has garnered extensive attention, particularly in studying PV cells at ambient temperatures. Notably, the renowned photocatalyst SrTiO3 has exhibited photo-responsiveness even at high temperatures [1], achieving a remarkable photovoltage exceeding 1.0 V [2] and a high short-circuit current density of approximately 1.5 mA•cm-2 [3] under optimized conditions.
Detailed analysis reveals that the induction of photo-response at high temperatures is influenced by photo-oxidation in SrTiO3 and the heterojunction between the photoelectrode and SrTiO3. Inspired by these insights, our research group explored the photo-response of ionic conducting materials at high temperatures. While experimenting with SrTiO3 deposited on Gd-doped CeO2 (GDC) electrolytes, it was found that the bare GDC electrolytes also showed a photo response under heating. This study focuses on the photo response of GDC at high temperatures and aims to unveil the photovoltage mechanism.
In our experiments, sintered GDC was mirror-polished, and Pt and Au electrodes were sputtered onto it. The samples were placed in a quartz chamber and heated within the range of 200 ºC to 400 ºC under O2-Ar gas flow. Open circuit voltage (OCV), electrochemical impedance spectroscopy (EIS), and DC polarization measurements were conducted under both UV (365 nm) irradiation and non-irradiation conditions. This presentation will discuss the impact of gas composition and temperature on the photo-response of GDC. Additionally, the contribution of oxygen transport on photovoltage will be validated by measuring the changes in oxygen partial pressure during UV irradiation using a yttria-doped zirconia oxygen sensor.
This work was supported by JSPS Grant-in-Aid for Research Activity Start-up Grant Number 23K19260.
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.