Enhanced thermal stability of exciton recombination in CsPbI3 perovskite nanocrystals via zinc alloying

Lead-free perovskite Rb2Sn1−xTexCl6 with bright luminescence for optical thermometry and tunable white light emitting diodes

“…2(b), the E b that have obtained by fitting the experimental data is 161.5 meV, which is larger than that of lead halide perovskites, 33 such as 51.2–96.0 meV for CsPbI 3 . 34 The correlation coefficient ( R 2 ) is 0.96, which indicates that the fitted line is consistent with the experimental data at 80–380 K. The PL emission intensity of Rb 2 Sn 0.95 Te 0.05 Cl 6 MCs becomes weak gradually with the increase of temperature, but the full width at half maximum (FWHM) displays a gradually increasing trend. The temperature dependence of the FWHM is fitted with the following equation of phonon broadening mode: 35 where ℏ ω phonon represents the phonon energy (ℏ, reduced Planck constant, ω phonon , phonon frequency), S is the electron–phonon coupling parameter, and T is the temperature.…”

“…2(b), the E b that have obtained by fitting the experimental data is 161.5 meV, which is larger than that of lead halide perovskites, 33 such as 51.2-96.0 meV for CsPbI 3 . 34 The correlation coefficient (R…”

Synthesis of highly stable double-coated Zn-doped cesium lead bromide nanocrystals for indium ion detection in water

“…We noticed that with the addition of a small amount of In 3+ -ions (18 mM), the PL intensity of the NCs slightly increased and the PL spectrum also blue-shifted due to an increase in the bandgap energy, due to crystal lattice contraction or shrinkage caused by the substitution of Pb-ions with Inions in the perovskite crystal lattices. [20][21][22][23][24][25] However, a linear…”

“…in the perovskite structure. [20][21][22][23][24][25] Such doping in the perovskite structure significantly improves structural stability via enhancing the formation energy, leading to an increase in emission intensity. Usually, partial substitution with smaller metal ions reduces the Pb-X bond length and stabilizes the perovskite structure by reducing octahedral distortion.…”

“…Zn-doped CsPbX 3 NCs have recently been employed in various optoelectronic devices for their improved crystal quality and reduced defect states. [21][22][23] Coating of perovskite NCs with comparatively stable shells, such as lower-dimensional perovskites [e.g., (OA) 2 PbBr 4 , Cs 4 PbX 6 ], metal oxides (e.g., SiO 2 , TiO 2 ), and metal sulfides (e.g., ZnS, PbS), help improve NC stability and emission intensity, and resist ion migration among the NCs. [26][27][28][29][30][31][32][33][34] Compared with the rigid inorganic shell, polymers are much more flexible and increase the hydrophobicity of the core NCs, thereby improving their water stability.…”