Size-controlled emission of long-time durable CsPbBr3 perovskite quantum dots embedded tellurite glass nanocomposites

Corrugated 1D Hybrid Metal Halide [C6H7ClN]CdCl3 Exhibiting Broadband White-Light Emission

“…11−13 The luminescence of 3D perovskites has been successfully adjusted through morphological fine-tuning strategies including quantum dots and coating technology. 14,15 However, it is difficult for 3D perovskite nanocrystals to achieve broadband spectra with white-light emission. In addition, the severe particle aggregation of 3D perovskite nanocrystals leads to unstable optical properties and degradation of the PLQY, which inevitably hinders its application in the field of optoelectronics.…”

Ligand‐Free CsPbBr3 Perovskite Quantum Dots in Silica‐Aerogel Composites with Enhanced Stability for w‐LED and Display by Substituting Pb2+ with Pr3+ or Gd3+ Ions

“…In the drying process, temperature and holding time had little but negligible influences on the growth of PQDs, as displayed in Figure S2, Supporting Information, where typical XRD peaks of cubic CsPbBr 3 (Pm3m) superimposed on the amorphous hump of silica aerogel. For CsPbX 3 PQDs @ SAPs composite synthesized with drying temperatures from 50 to 200 °C, the radius of CsPbBr 3 PQDs was evaluated by effective medium approximation [ 13 ] to be (≈5–7 nm) slightly smaller than that of average pore sizes (≈8–10 nm) for the corresponding pure SAPs (Figure S3 and Table S1, Supporting Information), which indirectly indicated that the silica wet gel or aerogel did limit PQDs growth to its nano‐size pores. For an intuitive observation on PQDs distribution in the silica aerogel skeleton, TEM images of CsPbX 3 PQDs @ SAPs composite were performed.…”

“…The other way to improve the stability of perovskite quantum dots (PQDs) was composite glass with PQDs embedded in the glass matrix, however, the photoluminescence quantum yield (PLQY) was relatively low (below 15%) because of interface defects or structural imperfections of PQDs induced by high temperature during fabrication processes. [13,14] So, an optimized synthesis route needs to be explored. As previously reported, synthesizing monodispersed CH 3 NH 3 PbBr x I 3 − x perovskite nanocrystals inside mesoporous silica (meso-SiO 2 ) templates improved the stability, [15] and besides, template-synthesized CsPbBr 3 NCs using meso-SiO 2 matrices showed a moderate PLQY of about Colloidal all-inorganic lead halide perovskite nanocrystals (LHP NCs) feature with tunable high-efficiency photoluminescence from blue to red for optoelectronic applications but suffer from instability under water moisture, UV light illumination, high-temperature shock, as well as oxygen erosion.…”

Modulating the local structure of glass to promote in situ precipitation of perovskite CsPbBr3 quantum dots by introducing a network modifier

“…Nowadays, by traditional melt-quenching and the subsequent heat treatment method, the CsPbBr 3 QDs have been successfully in situ precipitated in phosphosilicate glasses, [18][19][20][21][22][23] borosilicate glasses, 12,[24][25][26] tellurite-based glasses, 10,27 boron-germanium glasses, 28 etc. Nevertheless, the rigid and highly polymerized structure of the glass matrix hinders the growth and assembly of CsPbBr 3 QDs by limiting the diffusion of Cs + , Pb 2+ , and Br À ions, and results in their poor luminescence properties.…”