Quantum Dots and Photoluminescence in Halide Perovskite Nanocrystals

Quantum dots derived from halide perovskite nanocrystals combine the exceptional optoelectronic properties of the perovskite lattice (ABX₃, typically CsPbX₃ where X = Cl, Br or I) with the size-tunable emission of nanoscale semiconductors. Their defect-tolerant structure and strong quantum confinement yield high photoluminescence quantum yields across the visible and near-infrared spectra, while facile solution synthesis allows compositional and surface engineering. Trivalent lanthanide doping and energy transfer processes further extend emission wavelengths, enable photon upconversion and quantum-cutting phenomena, and improve stability. Such materials have shown promise in light-emitting diodes, broadband photodetectors, photovoltaics, and bioimaging. Challenges remain in controlling surface defects, ionic dynamics and long-term environmental resilience, but ongoing work on ligand passivation, lattice engineering and heterostructure design continues to push perovskite quantum dots towards scalable, high-performance optoelectronic devices.

Research from Nature Portfolio

Recent studies have demonstrated novel electroluminescent schemes that overcome intrinsic limitations of rare-earth transitions. One approach employs energy transfer from self-trapped excitons within an I2-based perovskite host to Ce3+ centres, achieving deep-blue external quantum efficiencies above 7% and luminance exceeding 1000 cd m⁻² in single-component light-emitting devices. Another foundational work has shown that sensitisation of CsPbX₃ quantum dots by lanthanide-doped nanoparticles permits finely tunable photon upconversion under low-intensity near-infrared excitation, extending exciton lifetimes from nanoseconds to milliseconds and enabling multi-colour emission beyond the intrinsic bandgap of the host nanocrystals.

Quantum Dots and Photoluminescence in Halide Perovskite Nanocrystals publication trend

The graph below shows the total number of articles in quantum dots and photoluminescence in halide perovskite nanocrystals across all publications each year (not limited to Nature Index journals).

Technical terms

Quantum dot: Semiconductor nanocrystal exhibiting discrete energy levels and size-dependent optical properties.

Halide perovskite nanocrystal: Nanoscale particle of the ABX₃ lattice (A = Cs⁺, B = Pb²⁺, X = halide) with exceptional defect tolerance.

Photoluminescence quantum yield: Fraction of absorbed photons re-emitted as luminescence, indicating emission efficiency.

Exciton: Coulombically bound electron–hole pair within a semiconductor.

Quantum confinement: Spatial restriction of charge carriers in three dimensions, leading to quantised energy levels.

Lanthanide doping: Introduction of rare-earth ions into the host lattice to induce narrow-band emission and energy transfer pathways.

References

1. Efficient deep-blue electroluminescence from Ce-based metal halide. Nature Communications (2024).
2. Near-infrared-triggered photon upconversion tuning in all-inorganic cesium lead halide perovskite quantum dots. Nature Communications (2018).
3. Highly DUV to NIR-II responsive broadband quantum dots heterojunction photodetectors by integrating quantum cutting luminescent concentrators. Light: Science & Applications (2024).
4. Speciation of Lanthanide Metal Ion Dopants in Microcrystalline All-Inorganic Halide Perovskite CsPbCl3. Journal of the American Chemical Society (2024).
5. Ytterbium-Doped Lead–Halide Perovskite Nanocrystals: Synthesis, Near-Infrared Emission, and Open-Source Machine Learning Model for Prediction of Optical Properties. Nanomaterials (2023).