Publication date: 15th December 2025
The transition toward a sustainable energy landscape requires the development of high-efficiency optoelectronic devices that minimize energy loss and utilize high-performance materials. Semiconductor Quantum Dots (QDs) and their size-dependent optical properties are fundamental to modern optoelectronics. Lead Halide Perovskite Quantum Dots (PQDs) are a breakthrough material for sustainable applications such as next-generation solar cells and low-energy light sources, offering exceptional photoluminescence quantum yields (PLQY) and exciton diffusion coefficients that are up to two orders of magnitude higher than those of conventional II-VI QDs [1].
In solid-state QD films, energy transport is dominated by Föster Resonance Energy Transfer (FRET), a non-radiative mechanism that is critical for the performance of these devices, given the typical insulating nature of surface ligands. Energy transport is usually studied through exciton diffusion, which reveals the presence of different regimes as a function of the film temperature. In these studies, thermal activation and defects are the main parameters proposed to explain the significant decrease of the exciton diffusion (and thus energy transfer) observed above a certain temperature, typically comprised between 100 K to 200 K [2]. Below that temperature, FRET dominates diffusion, and different mechanisms have been proposed to be at the origin of the particular temperature dependence observed [1]. In this work, we use Spectrally-Resolved Time-Resolved Photoluminescence (TRPL) to systematically investigate the different parameters influencing the observed dependence of FRET with temperature [3]. In our to do so, we analyze the exciton decay kinetics in both the donor and acceptor spectral regions at different temperatures to extract the FRET efficiency, and evaluate its correlation with different parameters such as inter-QD distance compression, absorption-emission spectral overlap or oscillator strength. Our findings reveal that the temperature-dependent character of the oscillator strength is a primary factor governing energy transfer efficiency [4]. Understanding this mechanism is a crucial step toward optimizing the performance of QD-based technologies across different operating temperatures.
This research work was funded by the European Commission-NextGenerationEU, through Momentum CSIC Programme: Develop Your Digital Talent, under grant MMT24-ICMS-01.
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.