Three‐Dimensional Cuprous Lead Bromide Framework with Highly Efficient and Stable Blue Photoluminescence Emission

Sun, Chen; Guo, Yahui; Han, Shasha; Li, Jingzhao; Jiang, Kuan; Dong, Linfeng; Liu, Qilong; Yue, Cheng‐Yang; Lei, Xiao‐Wu

doi:10.1002/anie.202006990

Cited by 62 publications

(32 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure S6. The decay lifetime curves of (TPA) 2 PbBr 4 SCs at 98 K. References [3,[15][16][17][51][52][53][54][55][56][57][58][59][60] were cited in Supplementary Materials.…”

Section: Supplementary Materialsmentioning

confidence: 99%

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

et al. 2022

View full text Add to dashboard Cite

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.

show abstract

“…Figure S6. The decay lifetime curves of (TPA) 2 PbBr 4 SCs at 98 K. References [3,[15][16][17][51][52][53][54][55][56][57][58][59][60] were cited in Supplementary Materials.…”

Section: Supplementary Materialsmentioning

confidence: 99%

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

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Compared with high energy emission, low energy emission has lower activation energy resulting in the significant decreases of low band emission at high temperature (Figure S6). The low energy broadband emission at low temperature is possibly from the self‐trapped state, which is also observed in some lead halides [2d] . In addition, the maximum emission wavelength exhibits a slight red shift from 520 to 530 nm in the cooling process, which originates from the thermal expansion interaction (Figure S7).…”

Section: Resultsmentioning

confidence: 62%

Structural Evolution and Photoluminescence Properties of Two‐dimensional Lead Halide Perovskites

Pan

et al. 2022

Zeitschrift anorg allge chemie

View full text Add to dashboard Cite

Herein, by using different size of organic molecules as cation templates, we prepared four new two-dimensional (2D) lead halide perovskites, [PrPipz]PbBr 4 (1), [DMEDA]PbBr 4 (2), [TMEDA] 0.5 [DMA]PbCl 4 (3) and [TMA] 4 Pb 3 Cl 10 (4). Under the distinct structural directing effects of organic cations, compounds 1-4 present four different types of 2D inorganic layers. Remarkably, compounds 1, 3 and 4 exhibit broadband blue emissions, while compound 2 exhibits broadband yellow emission upon the excitation of UV light at room temperature. This work paves a way to modulate the crystal structure and photoluminescent property of low-dimensional halide perovskite via structural modulation strategy from the molecular level.

show abstract

“…This result indicates that at higher temperatures, more photons are coupled with excitons, thus activating the nonradiative recombination process. [ 31 ] Figure 4b exhibits the plots of integrated PL emission intensity versus the reciprocal of temperature. The activation energy ( E a ) can be derived from Arrhenius equation as follows.

I (T) = I_{0} / [1 + A \exp (- E_{normala} / k_{normalB} T)]

where I ( T ) is the emission intensity at different temperatures ( T ), and I 0 is that at 0 K, respectively.…”

Section: Resultsmentioning

confidence: 99%

Doped Emitting Cesium Silver Halides as X‐Ray Scintillator with Fast Response Time, High Absorption Coefficient, and Light Yield

Yao

Zhang

Sun

et al. 2021

Advanced Photonics Research

View full text Add to dashboard Cite

Radioluminescence materials (scintillators) are widely investigated because of their potential application in many fields, such as medical imaging, security‐related techniques, and nondestructive inspection. However, the fabrication of scintillator materials with simultaneously fast response time, high absorption coefficient, and high light yield, as well as low toxicity is still a challenge. Herein, the synthesis of Cu(I)‐doped Cs2AgI3 single crystals (SCs) with a 1D crystal structure is presented. A bright blue‐green photoluminescence (PL) is observed after incorporating Cu+ into the Cs2AgI3 SCs under UV irradiation at room temperature. The PL quantum yield of the doped samples can reach up to 73% at a Cu+ concentration of 0.66%. Experimental and theoretical studies show that the blue‐green emission may originate from self‐trapped excitons, which is further verified by photophysical results from control experiments on pure Cs2AgI3 SCs. Upon X‐ray excitation, Cu‐doped SCs exhibit fast scintillation decay time (288 ns), high light yield (27 000 photons per MeV), and high absorption coefficient compared with the commercial product (CsI: Tl). These results suggest that Cu‐doped Cs2AgI3 is an ideal scintillator, which will be a promising candidate for potential application in dynamic real‐time imaging and radiation detection.

show abstract

Three‐Dimensional Cuprous Lead Bromide Framework with Highly Efficient and Stable Blue Photoluminescence Emission

Cited by 62 publications

References 68 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

Structural Evolution and Photoluminescence Properties of Two‐dimensional Lead Halide Perovskites

Doped Emitting Cesium Silver Halides as X‐Ray Scintillator with Fast Response Time, High Absorption Coefficient, and Light Yield

Contact Info

Product

Resources

About