Publication date: 16th July 2025
Owing to the outstanding optoelectronical properties of hybrid lead halide perovskites, such as intense photoluminescence and adjustable band gap, this family of materials attracts a lot of attention. However, because of the lead toxicity, discovering new lead-free perovskite is urgent.
Chemists have recently focused on the preparation of lead-free hybrid metal halide perovskites for applications in optoelectronics but neglected the family of hybrid alkali halide perovskites that could have interesting properties. Herein, we demonstrate for the first time the synthesis of a new low-dimensional hybrid alkali halide perovskite, [(PiPH2)3I2]CsI5·H2O(PiP = piperazine, C4N2H10), exhibiting an orange/red emission which could be used to prepare phosphor converted-LEDs (pc-LEDs). Using temperature-dependent 2D emission-excitation and the power-dependent photoluminescence(PL) spectroscopic techniques, the photoemission of the 1D perovskite material is shown to originate from defects states. The excitation of the high energy emission under low temperature indicates that there are multiple defect states in the structure. Exploring this family of low dimensional hybrid alkali halide perovskites could be a route to the discovery of numerous low cost, non toxic and stable materials for optoelectronics.
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.