Two-Dimensional Copper Iodide-Based Inorganic–Organic Hybrid Semiconductors: Synthesis, Structures, and Optical and Transport Properties

Ki, Wooseok; Hei, Xiuze; Yi, Hyunjung; Liu, Wei; Teat, Simon J.; Li, Mengjun; Fu, Yang; Podzorov, Vitaly; Garfunkel, Eric; Li, Jing

doi:10.1021/acs.chemmater.1c01421

Cited by 32 publications

(40 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These compounds are air- and water-stable. It has been demonstrated that the thermal stability of copper(I) iodide hybrids depends on their dimensionality, and the overall trend is 0D < 1D < 2D. , The decomposition temperature for 0D and 1D copper(I) iodide hybrids is typically 50–150 °C. , Compounds 1 – 10 with 0D/1D structures are expected to have similar thermal stability. The hybrid copper iodide compounds presented here cover a wide variety of structural types.…”

Section: Resultsmentioning

confidence: 99%

Ligand Control of Structural Diversity in Luminescent Hybrid Copper(I) Iodides

et al. 2022

View full text Add to dashboard Cite

Copper (I) iodide hybrids are of interest for next-generation lighting technologies because of their efficient luminescence in the absence of rare-earths. Here, we report ten structurally diverse hybrid copper (I) iodides that emit in the green-red region with quantum yields reaching 67 %. The compounds display a diversity of structures including ones with 1D Cu-1 chains, Cu2I2 rhomboid dimers, and structures with two different arrangements of Cu4I4 tetramers. The compounds with Cu2I2 rhomboid dimers or Cu4I4 cubane tetramer have higher photoluminescence quantum yield than those with Cu-I 1D chain and octahedral Cu4I4 tetramer, owing to the optimal degree of condensation of the inorganic motifs that suppresses non-radiative processes. Electronic structure calculations on these compounds point out the critical influence of the inorganic motif and organic ligand on the nature of the band gaps and thus the excitation characteristics. Temperature dependent photoluminescence spectra are presented to better understand the nature of luminescence in compounds with different inorganic motifs. The emerging understanding of composition-structure-property correlations in this family provide inspiration for the rational design of hybrid phosphors for general lighting applications.

show abstract

Section: Resultsmentioning

confidence: 99%

Ligand Control of Structural Diversity in Luminescent Hybrid Copper(I) Iodides

et al. 2022

View full text Add to dashboard Cite

show abstract

“…They are ideal candidates for better‐performing lighting materials containing no rare‐earth metals, as well as promising alternative materials for luminescent noble metal Ir(III), Pt(II), Os(II) complexes given the low price, minor environmental pollution, and abundant resource of copper. [ 1–13 ] Owing to the rich coordination chemistry of Cu(I) ions, their combination with organic and inorganic ligands often leads to a large structural diversity, ranging from discrete molecular 0D to 1D chains, and from 2D layers to extended 3D networks. [ 14–18 ]…”

Section: Introductionmentioning

confidence: 99%

“…

…”

mentioning

confidence: 99%

Highly Luminescent Copper(I) Halide Phosphors Encapsulated in Fumed Silica for Anti‐Counterfeiting and Color‐Converting Applications

Chen

Dai

et al. 2022

Advanced Optical Materials

View full text Add to dashboard Cite

Os(II) complexes given the low price, minor environmental pollution, and abundant resource of copper. [1][2][3][4][5][6][7][8][9][10][11][12][13] Owing to the rich coordination chemistry of Cu(I) ions, their combination with organic and inorganic ligands often leads to a large structural diversity, ranging from discrete molecular 0D to 1D chains, and from 2D layers to extended 3D networks. [14][15][16][17][18] Generally, luminescent Cu(I) hybrid materials can be synthesized via the reaction of CuX with organic nitrogen, phosphorus, and sulfur ligands in organic solvents. [19][20][21] The inorganic and organic components may connect via covalent bond, ionic bond, or coordination action. [22][23][24][25] The overall performance of the complexes can be systematically tuned by changing the reactants and reaction conditions, yielding a broad range of physical and chemical properties, such as the optical, electronic, catalytic, or sensing. [26][27][28][29][30][31] However, most synthesis methods are undertaken in harmful and flammable organic solvents, including acetone, acetonitrile, dimethylformamide, etc. Recently, some researchers reported the mechanochemical synthesis of luminescent Cu(I) hybrid materials by mechanical grinding without a solvent, or in the presence of a slight amount of assisting solvent to initiate the ligand exchange reaction. [32,33] However, a considerable amount of solvent needs to be used to purify the product. Meanwhile, the resultant products usually show poorer optical properties than those synthesized by the traditional solution methods. Additionally, the obtained luminescent composites tend to aggregate to form large particles, which are inconvenient for further applications.Although aqueous processed synthesis has drawn more and more attention following the requirement of sustainable development, there are rare reports about the aqueous synthesis of luminescent Cu(I) hybrid materials. Recently, Yao et al. prepared the high-green-emission Cu 4 I 6 (pr-ted) 2 /polyvinylpyrrolidone (PVP) ink (pr-ted: 1-propyl-1,4-diazabicyclo[2.2.2]octan-1-ium) via the one-pot synthesis in water/ethanol solution, where PVP played a key role in confining the Cu 4 I 6 (pr-ted) 2 clusters in nanoscale. [34] However, the process involves ethanol and the ink is green emission only. The aqueous synthesis of Luminescent Cu(I) hybrid materials are currently receiving increasing attention due to their rich photophysical properties with promising phosphors applications. However, the complex synthesis processes usually involving chemotoxic organic solutions largely hinder their practical applications. Herein, the authors introduce the highly luminescent copper(I) halide phosphors encapsulated in fumed silica synthesized via aqueous mechanochemical process. By using different precursors, they obtain blue, green, and orange emission copper(I) halide phosphors with high photoluminescence quantum yields. The green emission is owing to the formation of the well-known 0D (18-crown-6) 2 Na 2 (H 2 O) 3 Cu 4 I 6 (CNCI), whil...

show abstract

“…[8][9][10][11][12] Such cuprous complexes show great potential for applications in optoelectronic devices and luminescencebased sensors. [13][14][15][16][17] The d 10 configuration of Cu(I) tends to favor the tetrahedral geometry and extensive studies on Cu(I)-based emitters show that the typical mononuclear four-coordinated Cu(I) complexes generally exhibit inferior luminescence properties. 18,19 This is associated with the nature of the low oxidation potential of the Cu + ion, which results in significant metal-to-ligand charge transfer (MLCT) excited states.…”

Section: Introductionmentioning

confidence: 99%