A Systematic Approach to Achieving High Performance Hybrid Lighting Phosphors with Excellent Thermal‐ and Photostability

Abstract

The authors have designed and synthesized a family of high-performance inorganic-organic hybrid phosphor materials composed of extended and robust networks of one, two, and three dimensions. Following a bottomup solution-based synthetic approach, these structures are constructed by connecting highly emissive Cu 4 I 4 cubic clusters via carefully selected ligands that form strong CuN bonds. They emit intensive yellow-orange light with high luminescence quantum efficiency, coupled with large Stokes shift, which greatly reduces self-absorption. They also demonstrate exceptionally high framework-and photostability, comparable to those of commercial phosphors. The high stabilities are the result of significantly enhanced CuN bonds, as confirmed by the density functional theory (DFT) binding energy and electron density calculations. Possible emission mechanisms are analyzed based on the results of theoretical calculations and optical experiments. Two-component white phosphors obtained by blending blue and yellow emitters reach an internal quantum yield as high as 82% and correlated color temperature as low as 2534 K. The performance level of this subfamily exceeds all other types of Cu-I based hybrid systems. The combined advantages make them excellent candidates as alternative rare-earth element-free phosphors for possible use in energy-efficient lighting devices.

A water-stable fcu-MOF material with exposed amino groups for the multi-functional separation of small molecules

“…Thus, it is regarded as a suitable alternative to save the tremendous energy of distillation-based separation. Metal-organic frameworks (MOFs) [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23], a class of promising porous materials, offer promise for gas storage and separation due to their highly versatile nature in pore structure and functionalization [24][25][26][27][28][29][30][31][32][33][34][35][36][37]. Some accomplished pore tuning strategies were used to directly increase the pore sizes within MOFs aiming at gas storage at high pressure.…”

Flexible and Hierarchical Metal–Organic Framework Composites for High‐Performance Catalysis

“…[1] MOFs are well-known for their extraordinarily high porosity and internal surface areas. [2] Owing to their crystalline and porous structures,M OFs have been widely used in many application, including gas storage, [3] gas separation, [4] heterogeneous catalysis, [5] light emission, [6] drug delivery, [7] and proton conduction. [8] However, most MOFs are rigid, brittle, and very easy to be crumbled.…”

Highly Luminescent Inks: Aggregation‐Induced Emission of Copper–Iodine Hybrid Clusters

“…In our proposed strategy, the choice of highly luminescent 0D‐Cu 4 I 4 (py) 4 hybrid clusters as initial building blocks is based on their higher stability in comparison to other Cu x I x ‐based cluster species . In addition, the weak coordination bonding between pyridine groups and the cubic Cu 4 I 4 cores enables the ligand exchange of pyridines with other ligands very easily . To endow high solubility of cubic Cu 4 I 4 core, we used tris(3‐methylphenyl)phosphine (P‐( m ‐Tol) 3 ) ligands to substitute the pyridine ligands of Cu 4 I 4 (py) 4 because the 3‐methylphenyl groups behave strong affinity with organic solvent.…”