Emission‐Color‐Tunable Pb−Sn Alloyed Single Crystals with High Luminescent Efficiency and Stability

Liao, Jinfeng; Zhang, Zhipeng; Zhang, Zhizhong; Wang, Bingzhe; Zhou, Lei; Xing, Guichuan; Tang, Zikang; Kuang, Dai‐Bin

doi:10.1002/adom.202102426

Cited by 19 publications

(10 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…† Dual emissions can generally be achieved in Sn 2+based multi-ionic metal halides. 14,42 However, as we know, Sn 2+ -based multi-ionic metal halides are susceptible to the rapid oxidation of Sn 2+ to Sn 4+ . The stability of multi-ionic metal halides is important for their potential applications in light-emitting diodes or anti-counterfeiting.…”

Section: Resultsmentioning

confidence: 99%

“…[10][11][12][13] Compared to 3D structures, the soft crystal lattices of lowdimensional structures facilitate the self-trapping of excitons in photoinduced transient lattice defects due to strong phononexciton interactions, thus leading to large Stokes shifts and broad luminescence during the relaxation process. [14][15][16] In 2014, Karunadasa et al reported an intriguing broad emission in a lead halide material, (N-MEDA)PbBr 4 (N-MEDA: N1-methyl-ethane-1,2-diammonium). This emission arises from the radiative recombination of self-trapped excitons (STEs).…”

Section: Introductionmentioning

confidence: 99%

“…[18][19][20] 0D structures are low-dimensional analogs that enable all single metal halide unit cells to be completely isolated from each other by large organic cations, and thus these structures show the intrinsic emissions of individual metal halide species without mutual interference. 14,21 It is also noteworthy that the intense quantum confinement effect in 0D organic metal halides significantly boosts the photoluminescence quantum yield (PLQY) with respect to 3D, 2D and 1D systems. 15,22 With great efforts devoted to the experimental and theoretical study of 0D materials in recent years, many 0D luminescent metal halides with different geometries (e.g., octahedral SnX 6 2− , pyramidal SbX 5 2− , and disphenoidal SnX 4 2− ) have been developed with nearly 100% PLQY.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Regulating the coordination geometry of polyhedra in zero-dimensional metal halides for tunable emission

2023

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Regulating the coordination geometry of polyhedra in zero-dimensional metal halides for tunable emission

2023

Self Cite

View full text Add to dashboard Cite

show abstract

“…Multi-functional luminescent materials with broad response to different excitation sources afford the various applications in the solid-state lighting device, [1][2][3][4][5][6][7][8][9][10][11][12][13] anti-counterfeiting, [14][15][16][17][18][19] optical refrigeration, [20,21] and X-ray detection. [22][23][24][25][26][27][28] Recently, anti-counterfeiting has become a serious global issue in our daily lives, commercial trade, intellectual property protection, document encryption, etc.…”

Section: Introductionmentioning

confidence: 99%

Bright Cyan‐Emissive Copper(I)‐Halide Single Crystals for Multi‐Functional Applications

Luo

Zhang

et al. 2022

Advanced Optical Materials

Self Cite

View full text Add to dashboard Cite

In particular, the fluorescence inks could be easily printed on the banknote, ID card, passport, and packaging of the product; accordingly, the anti-counterfeiting technology based on fluorescence tags has been highlighted with low cost, high-security level, and facile decryption process that can be directly recognized by the ultraviolet (UV) lamp. [35] For instance, the emission of A 2 AgX 3 (A = Rb, Cs; X = Cl, Br, I) could be facilely regulated by changing the composition, showing the application potential in fluorescence anti-counterfeiting. [36] Nevertheless, the limited response range makes traditional UV light-activated anti-counterfeiting fluorescence tags unsatisfactory for the requirements of high-level anticounterfeiting applications. Therefore, exploring complicated anti-counterfeiting fluorescent materials whose response range can be broadened from UV to near-infrared (NIR) light and even X-rays are urgently needed. The fluorescent materials with a down-conversion response require a suitable energy gap that the UV light could activate. However, the traditional metal-oxide semiconductors possess a wide bandgap; thus, it is necessary to introduce lanthanide metal ions to act as activators. [37] The up-conversion photoluminescence (UCPL) process usually involves photosensitizers (Yb 3+ , etc.) to absorb infrared light and transfer the absorbed energy to other luminescent species. [38] Nonetheless, the multi-photon absorption process usually occurs under the irradiation of high-power laser (e.g., >1 kW cm −2 ), hampering the application in practical scenarios. Moreover, the doping amount of photosensitizers is critical for the final emissive behaviors and lacks batch-to-batch and labto-lab reproducibility. In terms of X-ray scintillators, except for extraordinary luminescence efficiency, the attenuation capability to X-ray becomes another critical criterion for screening the efficient scintillators, which requires the participation of heavy atoms, such as metal and iodine elements. Overall, it is still challenging to synthesize a single-source material with response to UV, NIR, and X-ray simultaneously.Recently, the outstanding photophysical performance of metal halide perovskites and derivatives has brought them to the research forefront of luminescent materials. For instance, the 3D CsPbX 3 (X = Cl, Br, and I) nanocrystals show extraordinary down-conversion properties due to the spatial confinement of excitons within nanocrystals. [39][40][41] Fortunately, lowering down the crystal structure dimensionality is another strategy Anti-counterfeiting has become a serious issue around the global world; fluorescence-based tags are praised for the low-cost and facile decryption process. However, the high-level anti-counterfeiting application requires incorporating multifunctional luminescent materials with response to different excitation sources. Herein, a dimeric Cu(I)-halide-clusters-assembled singlecrystal (AEP) 2 Cu 2 I 6 •2I•2H 2 O (AEP = N-aminoethylpiperazinium) concerning a high down-conversion photol...

show abstract

“…[32] Kuang et al recently pointed that there are two independent STEs emitters in Pb−Sn alloyed single crystals, (C 10 NH 22 ) 2 Pb 1−x Sn x Br 4 . [33] In this regard, the photogenerated species in the mixed Pb−Sn perovskite and the formation process of broad emission bands remain controversial. Therefore, more in-depth investigations are required to understand the true origin of the broad light emission in these materials.…”

Section: Introductionmentioning

confidence: 99%

Unraveling the Broadband Emission in Mixed Tin‐Lead Layered Perovskites

Fang

Tekelenburg

Xue

et al. 2022

Advanced Optical Materials

View full text Add to dashboard Cite

Low‐dimensional halide perovskites with broad emission are a hot topic for their promising application as white light sources. However, the physical origin of this broadband emission in the sub‐bandgap region is still controversial. This work investigates the broad Stokes‐shifted emission bands in mixed lead‐tin 2D perovskite films prepared by mixing precursor solutions of phenethylammonium lead iodide (PEA2PbI4, PEA = phenethylammonium) and phenethylammonium tin iodide (PEA2SnI4). The bandgap can be tuned by the lead‐tin ratio, whereas the photoluminescence is broad and significantly Stokes‐shifted and appears to be fairly insensitive to the relative amount of Pb and Sn. It is experimentally observed that these low‐dimensional systems show substantially less bandgap bowing than their 3D counterpart. Theoretically, this can be attributed to the smaller spin–orbit coupling effect on the 2D perovskites compared to that of 3D ones. The time‐resolved photoluminescence shows an ultrafast decay in the high‐energy range of the spectra that coincides with the emission range of PEA2SnI4, while the broadband emission decay is slower, up to the microsecond range. Sub‐gap photoexcitation experiments exclude exciton self‐trapping as the origin of the broadband emission, pointing to defects as the origin of the broadband emission in 2D Sn/Pb perovskite alloys.

show abstract

Emission‐Color‐Tunable Pb−Sn Alloyed Single Crystals with High Luminescent Efficiency and Stability

Cited by 19 publications

References 49 publications

Regulating the coordination geometry of polyhedra in zero-dimensional metal halides for tunable emission

Regulating the coordination geometry of polyhedra in zero-dimensional metal halides for tunable emission

Bright Cyan‐Emissive Copper(I)‐Halide Single Crystals for Multi‐Functional Applications

Unraveling the Broadband Emission in Mixed Tin‐Lead Layered Perovskites

Contact Info

Product

Resources

About