Zero-dimensional plate-shaped copper halide crystals with green-yellow emissions

Liu, Feng; Mondal, Debayan; Zhang, Kai; Zhang, Ying; Huang, Keke; Wang, Dayang; Yang, Wensheng; Mahadevan, Priya; Xie, Rui-Hua

doi:10.1039/d1ma00061f

Cited by 14 publications

(15 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Addressing the concerns mentioned above, Cu(I)-based metal halides have become a hot material because of their low toxicity, earth abundance, and highly efficient emission. Progress in this regard includes Cs 3 Cu 2 I 5 (PLQY ∼ 90%, blue emission), 26 CsCu 2 I 3 (PLQY ∼ 15%, yellow emission), 27 Rb 2 CuBr 3 (PLQY ∼ 98.6%, blue emission), 28 (DTA) 2 Cu 2 I 4 (PLQY ∼ 60%, green-yellow emission), 29 (MA) 4 Cu 2 Br 6 (PLQY ∼ 93%, green emission), 30 TEA 2 Cu 2 Br 4 (PLQY ∼ 94.73%, blue emission), 31 (TBA)CuBr 2 (PLQY ∼ 55%, cyan emission), 32 and [KC 2 ] 2 [Cu 4 I 6 ] (PLQY ∼ 97.8%, greenish-yellow emission). 33 However, it is still a challenge to achieve white light emission for single-component Cu(I)-based metal halides.…”

Section: Introductionmentioning

confidence: 99%

Pure White Emission with 91.9% Photoluminescence Quantum Yield of [(C₃H₇)₄N]₂Cu₂I₄ out of Polaronic States and Ultra-High Color Rendering Index

Peng

Tian

Wang

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Recently, cuprous halide perovskite-type materials have drawn tremendous attention for their intriguing optical properties. Here, a zero-dimensional (0D) Cu(I)-based compound of [(C3H7)4N]2Cu2I4 ([C3H7)4N]+ = tetrapropylammonium cation) was synthesized by a facile solution method, a monoclinic system of P21/n symmetry with a Cu2I4 2– cluster as the confined structure. The as-synthesized [(C3H7)4N]2Cu2I4 exhibits bright dual-band pure white emission with a photoluminescence quantum yield (PLQY) of 91.9% and CIE color coordinates of (0.33, 0.35). Notably, this compound also exhibits an ultrahigh color rendering index (CRI) of 92.2, which is comparable to the highest value of single-component metal halides reported recently. Its Raman spectra provide a clear spectral profile of strong electron–phonon interaction after [(C3H7)4N]+ incorporation, favoring the self-trapped exciton (STE) formation. [(C3H7)4N]2Cu2I4 can give dual-STE bands at the same time because of the Cu–Cu metal bond in a Cu2I4 2– cluster, whose populations could be scaled by temperature, together with the local dipole orientation modulation of neighboring STEs and phase transition related emission color coordinate change. Particularly, the outstanding chemical- and antiwater stability of this compound was also demonstrated. This work illustrates the potential of such cuprous halide perovskite-type materials in multifunctional applications, such as lighting in varied environments.

show abstract

Section: Introductionmentioning

confidence: 99%

Pure White Emission with 91.9% Photoluminescence Quantum Yield of [(C₃H₇)₄N]₂Cu₂I₄ out of Polaronic States and Ultra-High Color Rendering Index

Peng

Tian

Wang

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…Hence, many researchers try to insert different organic cations into Cu(I)X lattice to develop new Cu(I)-based compounds with unique optical properties. Recently, some progresses have been achieved in hybrid organic cuprous halides with self-trapped exciton (STE) emission, mainly including (MA) 4 Cu 2 Br 6 (green emission), [N(C 2 H 5 ) 4 ] 2 [Cu 2 Br 4 ] (blue emission), (TBA) 2 Cu 2 I 4 (cool-white emission), and (DTA) 2 Cu 2 I 4 (green-yellow emission). − In these compounds, the formation of STEs plays a dominant role in their emission process due to both spatial and dielectric confinements of incorporated organic molecules . However, the role of organic amine cations in the abovementioned compounds and the related mechanisms have not been clearly studied so far.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Broadband Green Emission of (TPA)CuCl₂ Single Crystals: Understanding the Formation of Self-Trapped States

et al. 2022

View full text Add to dashboard Cite

Recently, low-dimensional metal halides (LDMHs) have attracted tremendous attention due to their fascinating optoelectronic properties. Here, we report an organic–inorganic hybrid Cu(I)-based metal halide of (TPA)CuCl2 (TPA+ = tetrapropylammonium cation), where the isolated [CuCl2]− units are surrounded by TPA+, thus forming a zero-dimensional block. Moreover, the as-synthesized compound shows a broad green emission with a photoluminescence (PL) quantum efficiency of 91.8% and a large Stokes shift of 230 nm, stemming from the self-trapped exciton (STE) transition. Variable-temperature Raman spectra reveal that there is a strong anharmonic electron–phonon coupling in (TPA)CuCl2, which provides clear evidence for the formation of STEs, and this is also supported by the temperature-dependent PL spectra of (TPA)CuCl2. Moreover, it was found that TPA+ not only works as a ligand but also participates in the STE emission. Our results provide a clear statement that the formation of the STE is related not only to the low-frequency phonon of [CuCl2]− clusters but also to the mid-infra vibration of organic molecules, which promotes the understanding of the emission mechanism of LDMHs.

show abstract

“…Meanwhile, the PL intensity decreases monotonously with the increase of temperature, which is attributed to the enhanced nonradiative transition induced by thermal vibration. It is believed that the intense interaction between electrons and phonons, which is essential for the STEs, is associated with the high distortion of 0D OIMHs. , To evaluate the strength of interaction, the Huang–Rhys factor S was obtained by the following equation FWHM false( T false) = 2.36 S ℏ ω phone coth nobreak0em.25em⁡ ℏ ω phone 2 k normalB T where ℏω phone is the phonon frequency. As a result, the S factor was derived as large as 29.44, (Figure b).…”

Section: Resultsmentioning

confidence: 99%

High-Efficiency Intrinsic Yellow-Orange Emission in Hybrid Indium Bromide with Double Octahedral Configuration

Sun

Lin

et al. 2023

Inorg. Chem.

View full text Add to dashboard Cite

In-based organic−inorganic metal halides (OIMHs) have received growing interest in recent years as promising luminescent materials. However, the high efficiencies of 0D In-based OIMHs are all dependent on Sb doping in the existing literature. Here, we report a novel 0D In-based OIMH (C 10 H 22 N 2 ) 2 In 2 Br 10 , which exhibits intrinsic broadband emission (610 nm), and the photoluminescence quantum yield (PLQY) can reach 70% without Sb doping. (C 10 H 22 N 2 ) 2 In 2 Br 10 shows a typical 0D structure with three different In−Br polyhedra (two octahedra and one tetrahedron) separated by large organic cations. Based on the optical property measurements and theoretical calculations, we demonstrate that (C 10 H 22 N 2 ) 2 In 2 Br 10 is an indirect semiconductor with a band gap of 3.74 eV, and the In−Br inorganic moiety is primarily responsible for the intense emission of (C 10 H 22 N 2 ) 2 In 2 Br 10 . Interestingly, the unique double octahedral configuration in (C 10 H 22 N 2 ) 2 In 2 Br 10 may enhance the structural distortion and stimulate the self-trapped excitons (STEs), leading to the related high PLQY. Our work provides a novel 0D In-based OIMH with high-efficiency intrinsic emission, which is helpful for understanding the structure−PL relationships of hybrid halides.

show abstract

Zero-dimensional plate-shaped copper halide crystals with green-yellow emissions

Abstract: Low-cost and eco-friendly metal hybrid materials with zero dimensional (0D) structure have recently attracted increasing attention owing to their excellent optical properties and widely applications. However, successful examples of 0D...

Cited by 14 publications

References 56 publications

Pure White Emission with 91.9% Photoluminescence Quantum Yield of [(C₃H₇)₄N]₂Cu₂I₄ out of Polaronic States and Ultra-High Color Rendering Index

Pure White Emission with 91.9% Photoluminescence Quantum Yield of [(C₃H₇)₄N]₂Cu₂I₄ out of Polaronic States and Ultra-High Color Rendering Index

Highly Efficient Broadband Green Emission of (TPA)CuCl₂ Single Crystals: Understanding the Formation of Self-Trapped States

High-Efficiency Intrinsic Yellow-Orange Emission in Hybrid Indium Bromide with Double Octahedral Configuration

Contact Info

Product

Resources

About

Zero-dimensional plate-shaped copper halide crystals with green-yellow emissions

Abstract: Low-cost and eco-friendly metal hybrid materials with zero dimensional (0D) structure have recently attracted increasing attention owing to their excellent optical properties and widely applications. However, successful examples of 0D...

Cited by 14 publications

References 56 publications

Pure White Emission with 91.9% Photoluminescence Quantum Yield of [(C3H7)4N]2Cu2I4 out of Polaronic States and Ultra-High Color Rendering Index

Pure White Emission with 91.9% Photoluminescence Quantum Yield of [(C3H7)4N]2Cu2I4 out of Polaronic States and Ultra-High Color Rendering Index

Highly Efficient Broadband Green Emission of (TPA)CuCl2 Single Crystals: Understanding the Formation of Self-Trapped States

High-Efficiency Intrinsic Yellow-Orange Emission in Hybrid Indium Bromide with Double Octahedral Configuration

Contact Info

Product

Resources

About

Pure White Emission with 91.9% Photoluminescence Quantum Yield of [(C₃H₇)₄N]₂Cu₂I₄ out of Polaronic States and Ultra-High Color Rendering Index

Pure White Emission with 91.9% Photoluminescence Quantum Yield of [(C₃H₇)₄N]₂Cu₂I₄ out of Polaronic States and Ultra-High Color Rendering Index

Highly Efficient Broadband Green Emission of (TPA)CuCl₂ Single Crystals: Understanding the Formation of Self-Trapped States