Proceedings of MATSUS Fall 2023 Conference (MATSUSFall23)
DOI: https://doi.org/10.29363/nanoge.matsus.2023.318
Publication date: 18th July 2023
Masers, the microwave version of lasers, are a promising emerging class of ultralow-noise microwave amplifiers with the potential as quantum sensors in a range of commercial applications.[1] These devices rely on the photogeneration of electron spin-polarized triplet states in organic crystals of acene-doped-p-terphenyl or nitrogen-vacancy (NV) diamond. The stimulated collapse of these states by injected microwaves results in microwave emission and amplification which is highly sensitive to magnetic fields. However, due to inefficient electronic processes and triplet spin dynamics, these materials require large crystals with strong light pump sources to overcome the maser threshold, increasing their bulk and expense and damaging the gain media. Therefore, before masers can be widely applied, we must develop new materials with enhanced spin dynamics to ease their operation while increasing their power.
To tackle these issues, we have designed novel approaches to tune the properties of maser candidate molecular systems.[2,3] We have synthesized several new triplet and radical-based materials capable of producing extremely strong and long-lived electron spin polarisation through intersystem crossing, singlet fission, and triplet-radical interactions. We employed transient photoluminescence and absorption spectroscopy alongside electron paramagnetic resonance to understand the link between their spin dynamics and their merit as maser devices. Our new materials demonstrate the capacity to operate at various resonant frequencies and can be optically pumped at more easily generated wavelengths. Furthermore, their triplet spin dynamics suggest that similar systems could exhibit enhanced maser cooperativity. These results pave the way for the synthesis of more efficient and applicable maser technologies.
References:
[1] D. M. Arroo, N. M. Alford, J. D. Breeze, Appl. Phys. Lett. 2021, 119, 140502.
[2] W. Ng, X. Xu, M. Attwood, H. Wu, Z. Meng, X. Chen, M. Oxborrow, Adv. Mater. 2023, 35, 2300441.
[3] M. Attwood, X. Xu, M. Newns, Z. Meng, R. A. Ingle, H. Wu, X. Chen, W. Xu, W. Ng, T. T. Abiola, V. G. Stavros, M. Oxborrow, Chem. Mater. 2023, 35, 4498–4509.
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.