DOI: https://doi.org/10.29363/nanoge.DEPERO.2023.025
Publication date: 14th September 2023
Probing Perovskite Solar Cells: Insights into Surface, Interface, and Bulk Characteristics through X-ray Photoelectron Spectroscopy
Authors: Chittaranjan Das, Mayank Kedia and Michael Saliba
Institute for Photovoltaics,
University of Stuttgart, Stuttgart
Germany
Perovskite photovoltaic research has witnessed remarkable advancements in power conversion efficiency, primarily attributable to the outstanding optoelectronic characteristics of the semiconductor absorber layer. Simultaneously, the scientific community has undertaken comprehensive investigations into the fundamental properties that hold a pivotal role in shaping device performance. Among many fundamental properties, the precise positioning of interface band edges between various transport layers and the perovskite absorber layer emerges as a critical determinant, profoundly influencing the flow of photogenerated charges within the layer and thereby exerting a decisive impact on device performance. The positioning of band edges and electronic properties of the charge transport and contact layers are intrinsically governed by their chemical composition and the complex interplay they engage in with adjacent layers. This complex interplay, driven by the chemical nature of the materials involved, plays a decisive role in optimizing charge transport, minimizing recombination losses, and maximizing overall device efficiency.
The correlation between the chemical composition and its impact on the electronic properties of the semiconducting layer has been extensively investigated through X-ray photoelectron spectroscopy (XPS) studies [1]. In the context of perovskite solar cells, these XPS studies hold significant importance as they provide critical insights into the interfacial chemical and electronic properties [2,3].
In this presentation, we will delve into various facets of XPS studies in perovskite solar cells, encompassing examinations from the surface to the bulk properties and spanning across the critical interfaces within the device structure. We will showcase and discuss the principal findings derived from our XPS investigations on perovskite films and solar cell devices. These findings will encompass the electronic nature of the perovskite absorber film and its interactions at the interfaces with both electron and hole-transporting layers[4-6]. Through these discussions, we aim to shed light on the pivotal role that XPS studies play in advancing our comprehension of perovskite solar cell technology, ultimately driving innovation in renewable energy research.
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.