Synthetic Control on Structure/Dimensionality and Photophysical Properties of Low Dimensional Organic Lead Bromide Perovskite

U., Haris, M. P.; Bakthavatsalam, Rangarajan; Shaikh, Samir R.; Kore, Bhushan P.; Moghe, Dhanashree; Gonnade, Rajesh G.; Sarma, D. D.; Kabra, Dinesh; Kundu, Janardan

doi:10.1021/acs.inorgchem.8b02042

Cited by 33 publications

(43 citation statements)

References 66 publications

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“…Lead halide perovskites have emerged as excellent light emitting materials considering its high photoluminescence quantum yield (PLQY), wide color gamut (≈150% NSTC) and convenient fabrication process . The diversity of structural dimensionality also provides different carrier confinement effect and tunable emitting wavelengths . Benefiting from above excellent properties, CsPbBr 3 nanocrystals have recently been explored as excellent radiation scintillators, which could first convert high energy radiations (X‐rays and gamma rays) into visible light that are further captured and converted into electrical signals by a following photomultiplier …”

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confidence: 99%

Lead‐Free Halide Rb₂CuBr₃ as Sensitive X‐Ray Scintillator

et al. 2019

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into visible light that are further captured and converted into electrical signals by a following photomultiplier. [7][8][9][10][11] Scintillators have been actively utilized for radiation detection applications in many fields, like nondestructive inspection, medical imaging, and space exploration. Scintillator-based X-ray detectors are advantageous in terms of cost and stability than direct X-ray detectors (a-Se), and the current market of X-ray detectors is dominated by scintillators.The light yield of scintillators, as one of the most important figures of merit, determines the X-ray conversion efficiency and detection contrast. Liu and co-workers reported the good X-ray imaging properties from CsPbBr 3 nanocrystals [8] and Zhang et al. evaluated the light yield for CsPbBr 3 nanocrystals as 21 000 photons per MeV. [11] Such value is still much lower than traditional scintillators like Lu 1.8 Y 0.2 SiO 5 -Ce (LYSO, 33 200 photons per MeV), [12] CsI-Tl (54 000 photons per MeV) [12] and Gd 2 O 2 S-Tb (GOS, 60 000 photons per MeV) [13] etc. The major reason is that the small Stokes shift and the self-absorption effect for lead halide perovskites would severely restrict the light outcoupling efficiency in films and crystals, which require large thickness for complete X-ray attenuations. For scintillators, large Stokes shift and high photoluminescence efficiency are required to obtain high scintillation light yield. The recently emerged self-trapped exciton emissions from low dimensional perovskites exhibit large stokes shift and high PLQY, and may provide efficient X-ray scintillations, but have scarcely been studied. [14][15][16] Another severe issue restricting the applications of lead halide perovskite scintillators is the toxicity of lead element. The ionic nature of halide perovskites and high solubility in water may seriously harm the human health as well as the environment. It is thus of great significance to find lead-free perovskites or halide scintillators.Here we present 1D structured Rb 2 CuBr 3 as one new member of scintillators with exceptionally high light yield. Rb 2 CuBr 3 is obtained by direct reaction between RbBr and CuBr with phase-purity, high quality, and good stability. Its 1D crystal structure and soft crystal lattice facilitate the formation of self-trapped exciton, which emits at 385 nm with a large Stokes shift of 85 nm (0.91 eV) and 98.6% photoluminescence quantum yield. The high emission efficiency, large Stokes shift, strong X-ray attenuation, and good spectrum matching with the photomultiplier tube (PMT) or silicon photomultiplier Scintillators are widely utilized for radiation detections in many fields, such as nondestructive inspection, medical imaging, and space exploration. Lead halide perovskite scintillators have recently received extensive research attention owing to their tunable emission wavelength, low detection limit, and ease of fabrication. However, the low light yields toward X-ray irradiation and the lead toxicity of these perovskites severely restricts their practical ...

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Lead‐Free Halide Rb₂CuBr₃ as Sensitive X‐Ray Scintillator

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“…[6,45, However, the 2D lead bromide analogues are a comparatively underexplored phase space, where the structure-property-device relationship has recently started to be defined systematically. [26,[81][82][83][84][85][86][87] Intriguingly, we demonstrated earlier this year the stability relationship between 3D and 2D hybrid lead bromide perovskite films that manifest greater extrinsic stability than their lead iodide congeners. [81] Hence, we review the structural, luminescentoptoelectronic properties and device development of 2D hybrid lead bromide perovskites in order to assess and highlight their potential along with the iodide analogues.…”

Section: Introductionmentioning

confidence: 93%

“…(PDA) 7 Pb 6 Br 26 , [133] (HDA)PbBr 4 , [134] (NDA)PbBr 4 [134] (110) 6 × 6, (100), (100) Ama2, Cc, Cc (DMSO) [82] (no broadband emission), (100)…”

Section: D Perovskite Formulamentioning

confidence: 99%

Structure‐Property Relationships and Idiosyncrasies of Bulk, 2D Hybrid Lead Bromide Perovskites

Vasileiadou

Kanatzidis

2021

Israel Journal of Chemistry

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Bulk, 2D hybrid lead bromide perovskites comprise a robust family of halide perovskites with a rich structural and photophysical chemistry witnessed thus far. In an attempt to boost focus on systematically charting the phase space of 2D lead bromide perovskites, it is timely and critical to review the structure-property relationships that are emerging in this family of materials. In this review, we assess the multitude of (100)-orientated lead bromide perovskites, as well as the idiosyncratic (110)-orientated members. We examine the underpopulated phase space of bulk, thick-layer (n > 1) lead bromide perovskites, highlighting several examples of structures violating Goldschmidt's tolerance factor with large organic spacers in the cuboctahedral perovskite cages. The narrow and broadband emission is discussed, along with the developed optoelectronic profile of bulk, lead bromide perovskites, as yet. Lastly, we summarize the integration of 2D lead bromide perovskites in optoelectronic devices.

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“…Compared to their three‐dimensional (3 D) counterparts, lower‐dimensional organic metal halides exhibit larger exciton binding energies, owing to strengthened charge localization, which facilitates the formation of room‐temperature stable excitons and intense excitonic emission . In particular, the easier formation of self‐trapping excitons (STEs) in low‐dimensional structure is advantageous for the versatility of photoluminescence (PL) emission and subsequent application .…”

Section: Figurementioning

confidence: 99%

Exploring Organic Metal Halides with Reversible Temperature‐Responsive Dual‐Emissive Photoluminescence

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The exceptional structural tunability of organic metal halides endows them with fascinating electronic and photophysical properties, providing much scope for applications.I nt his work, single crystalso ft he organic metal halide (C 4 H 9 NH 3 ) 2 MnI 4 are found to show reversible thermo-induced luminescent chromism within aw ide temperature range.T he (C 4 H 9 NH 3 ) 2 MnI 4 single crystal exhibits two emission peaks at 550 and 672 nm, which are assigned to ad -d transition of Mn 2 + -centered tetrahedra and self-trapped excitons, respectively.T he temperature-dependent emission color change is attributed to the thermo-induced trapping and detrapping process of the self-trapped exciton. (C 4 H 9 NH 3 ) 2 MnI 4 exhibits am aximum photoluminescence quantum efficiency of up to 68 %a t 70 8C. The disclosed interacted photoluminescence decay mechanisms may prove useful for the further designo fo rganic metal halidesfor optical thermometry.

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Synthetic Control on Structure/Dimensionality and Photophysical Properties of Low Dimensional Organic Lead Bromide Perovskite

Cited by 33 publications

References 66 publications

Lead‐Free Halide Rb₂CuBr₃ as Sensitive X‐Ray Scintillator

Lead‐Free Halide Rb₂CuBr₃ as Sensitive X‐Ray Scintillator

Structure‐Property Relationships and Idiosyncrasies of Bulk, 2D Hybrid Lead Bromide Perovskites

Exploring Organic Metal Halides with Reversible Temperature‐Responsive Dual‐Emissive Photoluminescence

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Synthetic Control on Structure/Dimensionality and Photophysical Properties of Low Dimensional Organic Lead Bromide Perovskite

Cited by 33 publications

References 66 publications

Lead‐Free Halide Rb2CuBr3 as Sensitive X‐Ray Scintillator

Lead‐Free Halide Rb2CuBr3 as Sensitive X‐Ray Scintillator

Structure‐Property Relationships and Idiosyncrasies of Bulk, 2D Hybrid Lead Bromide Perovskites

Exploring Organic Metal Halides with Reversible Temperature‐Responsive Dual‐Emissive Photoluminescence

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Lead‐Free Halide Rb₂CuBr₃ as Sensitive X‐Ray Scintillator

Lead‐Free Halide Rb₂CuBr₃ as Sensitive X‐Ray Scintillator