Publication date: 15th December 2025
Short-wave infrared (SWIR, 1000–2000 nm) light is highly attractive for applications in optical communications, biological imaging, and sensing [1]. Colloidal InAs quantum dots (QDs) have emerged as a promising, RoHS-compliant material for SWIR applications, offering tunable optical properties and demonstrating significant advances in material synthesis and device integration [2]. Despite these advances, achieving high efficiency, strong radiance, and long-wavelength emission remains challenging, motivating further optimization of both materials and device architecture.
Previous InAs QD light-emitting diodes (LEDs) have demonstrated promising SWIR emission [3], representing an important step toward high-performance devices; however, efficiency, radiance, and emission at extended wavelengths have remained limited. Here, we show that optimizing InAs@ZnSe core-shell QDs in tailored LED architectures enables devices that simultaneously achieve high efficiency, high radiance, and emission at 1550 nm.
This performance was realized by systematically tuning the electron and hole transport layers to improve energy level alignment, carrier injection, and recombination balance within the emissive layer. Adjusting transport layer materials and thicknesses enhanced charge transport, reduced leakage currents, and promoted efficient radiative recombination.
The resulting LEDs exhibit an external quantum efficiency (EQE) exceeding 2% and a maximum radiance above 5 W*sr-1*m-2, demonstrating that InAs@ZnSe QDs, combined with optimized device architecture, provide a powerful platform for high-performance SWIR emission.
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.