Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Publication date: 1st March 2014
Photocurrent mapping or light-beam induced current (LBIC) measurements yield spatial information about photocurrent generation and collection. As such, the technique is extremely versatile and has found use in identification of features, optimising sub-optimal defects, degradation studies, assessing spatial uniformity – particularly of novel architectures – or for fundamental physical characterisation.
Solar cells based on organometal lead halide perovskite absorbers and / or conductors possess the special optical and electronic properties to revolutionise next-generation solution-processable photovoltaics. Self-assembly of the active perovskite or deposition of the charge-selective contacts by solution processes can yield defects on the microscopic scale, which can be detected by high-resolution photocurrent mapping. Thus, the technique can provide information to guide cell design.
Our photocurrent mapping system contains a choice of 3 excitation diodes (405, 520 and 635 nm), and is capable of spot-radius down to 3 μm. These wavelength choices span a range of penetration depth of about 4, given the spectral response of (CH3NH3)PbI3–xClx materials (0 ≤ x ≤ 1).
In this talk we explore the capabilities of photocurrent mapping for characterisation of perovskite solar cells. This is the first time photocurrent mapping of perovskite solar cells has been reported. We investigate spatial uniformity in devices as a function of fabrication conditions. Degradation effects are also explored. Through tracking photocurrent decay at device edges, we demonstrate the mechanism of humidity-induced degradation. Light-based degradation is explored in both TiO2-sensitised and Al2O3 meso-superstructured architectures.
Photocurrent map of a perovskite solar cell showing defects induced by the fabrication method and pin-holes in the evaporated gold cathode. Excitation wavelength = 635 nm.
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.