Metal Halide Perovskite Nanocrystals: Synthesis, Post-Synthesis Modifications, and Their Optical Properties.

Abstract: Abstract This work employs an ultrafast microwave‐assisted synthesis to achieve efficient and uniform Te 4+ doping in Cs 2 ZrCl 6 within 30 min at 60 °C, addressing key challenges of slow kinetics and inhomogeneous distribution prevalent in conventional methods. Structural and optical analyses confirm that temperature and concentration critically govern dopant incorporation and luminescent properties. Temperature‐dependent spectroscopy reveals undoped Cs 2 ZrCl 6 hosts dual self‐trapped excitons (Zr‐STE1 and Zr‐STE2) exhibiting excitation‐dependent thermally activated delayed fluorescence (TADF) with a minimal singlet‐triplet gap (0.060 eV). Te 4+ doping introduces efficient [TeCl 6 ] 2− emitters and modifies energy transfer pathways. Lifetime analysis demonstrates that host TADF, especially synergistic dual‐channel activation under 254 nm excitation, enables highly efficient (>83.1%) resonance energy transfer to [TeCl 6 ] 2− centers. Microwave optimization, achieving homogeneous shallow doping, yields an exceptional photoluminescence quantum yield (PLQY) of 95.43% for Cs 2 ZrCl 6 :Te, significantly outperforming conventional syntheses. The material exhibits outstanding stability under thermal, UV, humidity, cycling, and ambient conditions, with prototype LEDs demonstrating superior reliability. These findings establish a synergistic design strategy combining controlled doping and TADF‐mediated energy transfer for high‐performance luminescence.

TL;DR: Highly efficient green LEDs based on short-branched alkyl sulfobetaine-passivated CsPbBr3 nanocrystals.

TL;DR: In this article , a controlled assembly of CsPbBr3 nanoplatelets through varying the evaporation rate of the dispersion solvent was reported, and the assembly of superlattices in the face-down and edge-up configurations by electron microscopy, as well as X-ray scattering and diffraction.

TL;DR: In this paper , the surface of preformed nanocrystals can be reconstructed without altering the crystal phase and lattice structure of their core, using selected ligands, using a hexagonal-shaped orthorhombic CsPbBr3 platelet.

TL;DR: A low-cost, solution-processable solar cell, based on a highly crystalline perovskite absorber with intense visible to near-infrared absorptivity, that has a power conversion efficiency of 10.9% in a single-junction device under simulated full sunlight is reported.

TL;DR: In this paper, a simple route to the production of high-quality CdE (E=S, Se, Te) semiconductor nanocrystallites is presented, based on pyrolysis of organometallic reagents by injection into a hot coordinating solvent.

TL;DR: The compelling combination of enhanced optical properties and chemical robustness makes CsPbX3 nanocrystals appealing for optoelectronic applications, particularly for blue and green spectral regions (410–530 nm), where typical metal chalcogenide-based quantum dots suffer from photodegradation.

TL;DR: The use of a solid hole conductor dramatically improved the device stability compared to (CH3NH3)PbI3 -sensitized liquid junction cells.