Enhanced luminescence of Mn doped CsPbCl3 and CsPb(Cl/Br)3 perovskite nanocrystals stabilized in glasses

Large Spectral Shift of Mn2+ Emission Due to the Shrinkage of the Crystalline Host Lattice of the Hexagonal CsCdCl3 Crystals and Phase Transition

“…Mn 2+ ions have been exploited as spectroscopic probes in Cs 4 PbX 6 (X = Cl, Br) nanocrystals to stabilize and exhibit a remarkably long PL lifetime (26.2 ms) with a superior PLQY (25.8%) . Under excitation at 380 nm, Mn 2+ -doped CsPbCl 3 perovskite nanocrystals produce an orange PL at 590 nm and a red shift to 605 nm with an increase of the Mn 2+ concentration. − The excitation spectra of most Mn 2+ -doped all-inorganic perovskites are located in the near-UV region (<400 nm), which are unfavorable candidates for application in blue LED. It is desirable to develop the Mn 2+ -doped bulk all-inorganic perovskite crystals and tune their PL just through dynamic Jahn–Teller distortion of the crystal lattice with an excitation wavelength longer than 400 nm.…”

Strain Modulation for High Brightness Blue Luminescence of Pr3+-Doped Perovskite Nanocrystals via Siloxane Passivation

“…Alternative postsynthesis mixing at lower temperatures for Pb 2+ substitution and halide exchange have been desirable for wavelength tunable bluelight-emitting NCs. In this work, ligand exchange reaction for surface passivation of green CsPbBr 3 NCs is performed with a siloxane, 3 promoting halide uptake and leading to larger and uniformly sized NCs. By virtue of the cross-link reaction between the siloxane molecules, the lattice of the CsPbBr 3 NCs can be favorably strained for higher brightness green emission.…”

“…Therefore, cation exchange for Pb 2+ is also proposed to achieve higher stability of inorganic LHP nanocrystals (NCs), including the Cl/Br alloyed halide NCs . The substituent elements for Pb 2+ can be isovalent − including Mn 2+ , Cu 2+ , Ni 2+ , Zn 2+ , and Cd 2+ , or heterovalent − such as Al 3+ , or lanthanides, including Nd 3+ and Pr 3+ . Partial Pb 2+ substitution with metals of smaller ionic radii typically contribute to brightness and stability, and some of them modulate the emission wavelength such as blue-shifted photoluminescence (PL).…”

In Situ Growth of High-Quality CsPbBr3 Quantum Dots with Unusual Morphology inside a Transparent Glass with a Heterogeneous Crystallization Environment for Wide Gamut Displays

“…Compared with the traditional wet synthesis of CsPbBr 3 QDs, in situ growth of CsPbBr 3 QDs in the glass shows the merits of the facile and cost-effective glass fabrication technique, as well as easy mass production (Figure a). The as-prepared CsPbBr 3 QDs@glass composite exhibits a typical narrow-band green emission peaking at 526 nm with a full width at half-maximum (FWHM) of 25 nm (Figure b), attributed to the band-edge exciton recombination emissions from the embedded CsPbBr 3 QDs . Meanwhile, the emission spectrum profile almost does not change with the variation of excitation wavelength except for intensity (Figure S7), indicating that although the morphology of precipitated CsPbBr 3 QDs is different, the emission spectra are consistent.…”