Zero-Thermal-Quenching Layered Metal Halide Perovskite

Abstract

In the quest for new functional materials, Mn2+-activated metal halide perovskites (MHPs) were found to possess remarkable optical properties. However, they show low photoluminescence quantum yield (PLQY) and weak thermal stability. This is due to weak dopant–host interactions and strong phonon–lattice coupling at high temperatures of MHPs. Developing Mn2+-activated MHPs with a high PLQY and good thermal stability has become a highly versatile research area to meet current needs. Herein, we synthesized Mn2+ ion-activated Rb3(Cd1–x Mn x )2Cl7 layered metal halide perovskite (LMHP) and solved its crystal structure using direct methods. The Rb3(Cd1–x Mn x )2Cl7 LMHP exhibits an orange emission with a high PLQY of 88%, the highest among Mn2+-activated MHPs. Moreover, Rb3(Cd0.80Mn0.20)2Cl7 exhibits a zero-thermal-quenching (TQ) behavior, which is considered the first for the MHP family. Therefore, our results could pave the way for a search for new LMHPs with zero-TQ behavior for high-power optoelectronic applications.

Highly efficient yellow emission and abnormal thermal quenching in Mn2+-doped Rb4CdCl6

“…The properties of similar structure hosts are also very excellent after Mn 2+ ions doping, such as high emission quenching temperature and high PLQY. 18 XRD analysis confirmed that both Rb 4 CdCl 6 and Rb 4 CdCl 6 :0.05Mn 2+ share a similar crystal phase CCDC 2205344 † (Fig. 2a).…”

Thermally Stable Self‐Trapped Assisted Single‐Component White Light from Lead‐Free Zero‐Dimensional Metal Halide Nanocrystals

“…However, the integral PL intensity monotonically decreases, as shown in Figure a, as the temperature increases from 93 to 293 K, because the probability of nonradiative recombination increases. The exciton binding energy was determined using the Arrhenius equation: [ 18 ] $$\[ \begin{array}{*{20}{c}}{{I_{{\rm{S}}{{\rm{b}}^{3 + }}}}\left( T \right) = \frac{{{I_0}}}{{1 + A\exp \left( {\frac{{ - {E_{\rm{b}}}}}{{{K_{\rm{B}}}T}}} \right)}}}\end{array} \]$$where I 0 is the PL intensity at 0 K, $${I_{{\rm{S}}{{\rm{b}}^{3 + }}}}(T)$$ is the intensity at different temperatures, E b is the exciton binding energy, A is a constant related to the nonradiative to radiative rate, and K B is the Boltzmann constant. Owing to the zero‐dimensional nature, the exciton binding energy of CSC:Sb 3+ NCs was 131 meV (Figure 4b), which was higher compared with that of three‐dimensional MH perovskites (18 meV).…”

Highly Luminescent Earth‐Benign Organometallic Manganese Halide Crystals with Ultrahigh Thermal Stability of Emission from 4 to 623 K

“…To the best of our knowledge, this is the widest temperature range (ΔT = 570 K) observed in zero TQ materials, let alone its excellent PLQY of 94% (Table 1). [4,46,[49][50][51][52][53][56][57][58][59][60] For comparison, the PL of commercial silicate:Eu green phosphor (G1758, Intematix) was measured from room temperature to 623 K (Figure S9, Supporting Information). Obviously, the commercial green emissive phosphor suffers from serious TQ and the integrated intensity drops much more rapidly than MnI 2 (XanPO).…”