Publication date: 17th July 2025
Precise synthetic control over the doping polarity of colloidal nanocrystals offers a versatile platform to engineer their optoelectronic properties for efficient infrared (IR) photon harvesting. In this work, we present a synthesis-driven approach that enables switchable polarity by leveraging redox-active pnictogen precursors and carefully tuning surface reaction pathways. By controlling precursor oxidation states, ligand chemistry, and reaction kinetics, we achieve selective formation of stable n-type and p-type nanocrystals with tunable carrier densities and band alignments. This intrinsic polarity control is accomplished during synthesis without the need for additional post-treatments, providing a scalable and reproducible strategy for material fabrication. Building on this polarity modulation, we design advanced device architectures, including homojunction and barrier-type structures, that are specifically optimized to enhance charge separation, minimize recombination losses, and suppress dark current in IR photodetectors. The integration of synthetic polarity control with rational device structure engineering provides new opportunities to develop high-performance, solution-processed IR optoelectronic devices and contributes valuable design principles for next-generation nanocrystal-based technologies.
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.