Water-Stable Zero-Dimensional (C4H9)4NCuCl2 Single Crystal with Highly Efficient Broadband Green Emission

Peng, Hui; Wang, Xinxin; Tian, Yan; Dong, Ting; Xiao, Yonghao; Huang, Tao; Guo, Yongchang; Wang, Jianping; Zou, B. S.

doi:10.1021/acs.jpclett.1c01794

Cited by 65 publications

(65 citation statements)

References 49 publications

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“…This phenomenon is possibly due to electron-phonon coupling causing the bandgap to shrink. Further, the FWHM is effectively widened with increasing temperature, similarly to other 0D organic metal halides, such as [BAPrEDA]PbCl6•(H2O)2 and (C4H9)4NCuCl2 [17,41]. In general, the enhanced coupling of electronic and acoustic phonons can be attributed to this phenomenon.…”

Section: Resultsmentioning

confidence: 80%

A Zero-Dimensional Organic Lead Bromide of (TPA)2PbBr4 Single Crystal with Bright Blue Emission

et al. 2022

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Blue-luminescence materials are needed in urgency. Recently, zero-dimensional (0D) organic metal halides have attractive much attention due to unique structure and excellent optical properties. However, realizing blue emission with near-UV-visible light excitation in 0D organic metal halides is still a great challenge due to their generally large Stokes shifts. Here, we reported a new (0D) organic metal halides (TPA)2PbBr4 single crystal (TPA+ = tetrapropylammonium cation), in which the isolated [PbBr4]2− tetrahedral clusters are surrounded by organic ligand of TPA+, forming a 0D framework. Upon photoexcitation, (TPA)2PbBr4 exhibits a blue emission peaking at 437 nm with a full width at half-maximum (FWHM) of 50 nm and a relatively small Stokes shift of 53 nm. Combined with density functional theory (DFT) calculations and spectral analysis, it is found that the observed blue emission in (TPA)2PbBr4 comes from the combination of free excitons (FEs) and self-trapped exciton (STE), and a small Stokes shift of this compound are caused by the small structure distortion of [PbBr4]2− cluster in the excited state confined by TPA molecules, in which the multi-phonon effect take action. Our results not only clarify the important role of excited state structure distortion in regulating the STEs formation and emission, but also focus on 0D metal halides with bright blue emission under the near-UV-visible light excitation.

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Section: Resultsmentioning

confidence: 80%

A Zero-Dimensional Organic Lead Bromide of (TPA)2PbBr4 Single Crystal with Bright Blue Emission

et al. 2022

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“…The highly regular arrangement of the TBA + cation with larger steric hindrance distributed on the surface of [CuBr 2 ] − units affords denser crystal packing and an effective organic water-resistant layer to prevent water erosion. 11 To illustrate this performance, we compared the antiwater stability of several typical luminescent materials (Figure S9). Clearly, all samples exhibit their original shape in the air (above) and emit bright colors under UV light (middle).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…As is well known, the extreme humidity sensitivity of the cuprous-based compounds, the as-synthesized water-stable 0D (TBA)CuBr 2 , is amazing. The highly regular arrangement of the TBA + cation with larger steric hindrance distributed on the surface of [CuBr 2 ] − units affords denser crystal packing and an effective organic water-resistant layer to prevent water erosion . To illustrate this performance, we compared the antiwater stability of several typical luminescent materials (Figure S9).…”

Section: Resultsmentioning

confidence: 99%

“…Among the various alternatives, low-dimensional cuprous-based metal halides have attracted much attention owing to their high PLQY, earth abundance, and low cost, and low toxicity. − For example, Jun et al reported a kind of zero-dimensional (0D) Cs 3 Cu 2 I 5 single crystals (SCs) with coexisting tetrahedral and trigonal Cu + sites and a highly efficient blue emission (PLQY ∼ 90%) . Li et al successfully prepared high-quality CsCu 2 I 3 SCs by an antisolvent vapor-assisted method and developed a high-speed UV-to-vis photodetector .…”

Section: Introductionmentioning

confidence: 99%

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Bulk Assembly of Zero-Dimensional Organic Copper Bromide Hybrid with Bright Self-Trapped Exciton Emission and High Antiwater Stability

et al. 2021

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Recently, Cu(I)-based metal halides have gained great attention due to their fascinating structures and optoelectronic properties. Here, we report the synthesis, crystal structure, and photophysical properties of zero-dimensional (0D) organic copper bromide hybrid, where the isolated [CuBr2]− units are encircled by the organic cation of TBA+ (TBA+ = tetrabutylammonium cation), forming the bulk assembly of periodic 0D blocks. Moreover, this 0D structure enables strong electron–phonon interaction to promote the formation of a self-trapped excited state that shows a bright broadband cyan emission with a photoluminescence quantum yield (PLQY) of 55% for (TBA)CuBr2 single crystals (SCs). Particularly, the as-synthesized compound shows extraordinary antiwater stability, and its PL intensity remains above 99.1% after soaking in water for 24 h. This work illustrates that the water-sensitive Cu(I) can also be used as a high antiwater stability luminescent material by introducing appropriate multifunctional organic ligands, thus opening up a new route for high antiwater materials based on lead-free metal halides.

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“…( k is Boltzmann constant and T is 260 K) between the excited state and STE state. With temperature rise in the range of 80–260 K, the emission becomes stronger due to the progressively enhanced electron–phonon interaction, which facilitates STE formation by phonon‐assisted tunneling effect [15] . In contrast, the emission begins to decrease when the temperature is higher than 260 K due to the thermal quenching [15, 16] .…”

Section: Figurementioning

confidence: 99%

Highly Efficient Light‐Emitting Diodes Based on an Organic Antimony(III) Halide Hybrid

Sang

et al. 2021

Angewandte Chemie

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As low‐dimensional lead‐free hybrids with higher stability and lower toxicity than those of three‐dimensional lead perovskites, organic antimony(III) halides show great application potential in opt‐electronic field owing to diverse topologies along with exceptional optical properties. We report herein an antimony(III) hybrid (MePPh3)2SbCl5 with a zero‐dimensional (0D) structure, which exhibits brilliant orange emission peaked at 593 nm with near‐unity photoluminescent quantum yield (99.4 %). The characterization of photophysical properties demonstrates that the broadband emission with a microsecond lifetime (3.24 μs) arises from self‐trapped emission (STE). Electrically driven organic light‐emitting diodes (OLEDs) based on neat and doped films of (MePPh3)2SbCl5 were fabricated. The doped devices show significant improvement in comparison to non‐doped OLEDs. Owing to the much improved surface morphology and balanced carrier transport in light‐emitting layers of doped devices, the peak luminance, current efficiency (CE) and external quantum efficiency (EQE) are boosted from 82 cd m−2 to 3500 cd m−2, 1.1 cd A−1 to 6.8 cd A−1, and 0.7 % to 3.1 % relative to non‐doped devices, respectively.

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Water-Stable Zero-Dimensional (C₄H₉)₄NCuCl₂ Single Crystal with Highly Efficient Broadband Green Emission

Cited by 65 publications

References 49 publications

A Zero-Dimensional Organic Lead Bromide of (TPA)2PbBr4 Single Crystal with Bright Blue Emission

A Zero-Dimensional Organic Lead Bromide of (TPA)2PbBr4 Single Crystal with Bright Blue Emission

Bulk Assembly of Zero-Dimensional Organic Copper Bromide Hybrid with Bright Self-Trapped Exciton Emission and High Antiwater Stability

Highly Efficient Light‐Emitting Diodes Based on an Organic Antimony(III) Halide Hybrid

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