Luminescence of CsPbCl3-like Quantum Dots in CsCl : Pb Crystals

Aceves, R.; Babin, V.; Barboza-Flores, M.; Fabeni, P.; Nikl, M.; Nitsch, K.; Pazzi, G.P.; Río-Salas, Rafael Del; Zazubovich, S.

doi:10.1002/(sici)1521-3951(200105)225:1<247::aid-pssb247>3.0.co;2-l

Cited by 21 publications

(19 citation statements)

References 20 publications

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“…Many papers have also demonstrated the luminescent behavior of IHPs while no exploration was reported about the form of colloidal nanomaterials. Besides, the claimed luminescent particles usually exist in CsX crystals . Previously reported optical parameters were far from practical applications and hence, these IHPs didn't gain much attention.…”

Section: Introductionmentioning

confidence: 99%

All Inorganic Halide Perovskites Nanosystem: Synthesis, Structural Features, Optical Properties and Optoelectronic Applications

Cao

et al. 2017

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The recent success of organometallic halide perovskites (OHPs) in photovoltaic devices has triggered lots of corresponding research and many perovskite analogues have been developed to look for devices with comparable performance but better stability. Upon the preparation of all inorganic halide perovskite nanocrystals (IHP NCs), research activities have soared due to their better stability, ultrahigh photoluminescence quantum yield (PL QY), and composition dependent luminescence covering the whole visible region with narrow line-width. They are expected to be promising materials for next generation lighting and display, and many other applications. Within two years, a lot of interesting results have been observed. Here, the synthesis of IHPs is reviewed, and their progresses in optoelectronic devices and optical applications, such as light-emitting diodes (LEDs), photodetectors (PDs), solar cells (SCs), and lasing, is presented. Information and recent understanding of their crystal structures and morphology modulations are addressed. Finally, a brief outlook is given, highlighting the presently main problems and their possible solutions and future development directions.

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Section: Introductionmentioning

confidence: 99%

All Inorganic Halide Perovskites Nanosystem: Synthesis, Structural Features, Optical Properties and Optoelectronic Applications

Cao

et al. 2017

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“…behave as three-dimensional (3D) semiconducting systems. 4,5,8,13,14,[18][19][20][21][22][23][25][26][27][36][37][38][39][40][41][42] Compounds of the type (SC) nÀ1 (BC) 2 M n X 3n+1 (n ¼ 2: bilayer; n ¼ 3: trilayer; n $ 3: multilayer) behave as quasi-two-dimensional (q-2D) semiconducting systems. [3][4][5][6]13,14,16,24,38 Generally, the q-2D compounds have been prepared from solutions or melts of the corresponding 2D and 3D compounds.…”

Section: Introductionmentioning

confidence: 99%

“…1,4,5,34 However, the PL-spectra of the bulk 3D crystals, such as CH 3 NH 3 PbI 3 , CH 3 NH 3 PbBr 3 and CH 3 NH 3 PbCl 3 , show PL-bands at ca. 740, 535 and 408 nm, respectively, [1][2][3][4][5]8,13,[19][20][21][22][23][25][26][27][36][37][38][39][40][41][42] which are shifted to shorter wavelengths (710, 515 and 390 nm, respectively) and become stronger, after grinding the crystals. [6][7][8][9][13][14][15] Similar results have been also obtained from CsPbX 3 (X ¼ Cl, Br, I) by grinding 3,5,13,14 or from CsPbX 3 particles (X ¼ Cl, Br) in a CsX matrix.…”

Section: Introductionmentioning

confidence: 99%

Nanocrystalline/microcrystalline materials based on lead-halide units

et al. 2012

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“…This cubic structure has been reported to be advantageous for CsPbBr3 perovskites for photovoltaic applications due to its optimal band gap of ̴ 2.4 eV [58] in nanoparticle form. Other low temperature synthesis methods lead to yellow and non-luminescent nanocrystals, as a result of poor crystallinity or the formation of an orthorhombic crystal structure [59]. However, it has been reported that the cubic structure suffers a transformation to the orthorhombic structure when it is exposed to ambient conditions [60].…”

Section: Resultsmentioning

confidence: 99%

Structural characterization of bulk and nanoparticle lead halide perovskite thin films by (S)TEM techniques

et al. 2019

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In the last few years, lead halide (APbX3) perovskites, which are of interest for applications in photovoltaic and photonic devices, have demonstrated excellent optoelectronic performance. The structural characterization of APbX3 thin films using (scanning) transmission electron microscopy ((S)TEM) techniques can provide valuable information that can be used to understand their optoelectronic performance and device properties. However, since APbX3 perovskites are soft materials, their characterization using (S)TEM is challenging. Here, we study two APbX3 perovskite thin films: bulk CH3NH3PbI3, and nanoparticle (NP) CsPbBr3. Both specimen preparation methods and working conditions for analysis by (S)TEM are optimized. On the one hand, we show that CH3NH3PbI3 thin films grown by a one step method are composed of independent grains with random orientations. The growth method results in the formation of tetragonal perovskite films with good adherence to an underlying TiO2 layer and with a photoluminescence (PL) emission band that has a Gaussian shape and is centered at 775 nm. On the other hand, in the NP CsPbBr3 perovskite thin films the colloidal NPs, which are used as the building blocks of the film, are preserved by the deposition process. Small gaps are observed between adjacent NPs in the deposited film. The crystal structure is cubic, which is beneficial due its optimal band gap. The colloidal NPs shows similar absorption and PL in the thin film as in the colloidal solution, indicating good homogeneity and the absence of aggregation of NPs in the film. Care was required to avoid long electron irradiation times during these studies, even at a low voltage of 80 kV, as the material was observed to decompose through Pb segregation.

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Luminescence of CsPbCl3-like Quantum Dots in CsCl : Pb Crystals

Cited by 21 publications

References 20 publications

All Inorganic Halide Perovskites Nanosystem: Synthesis, Structural Features, Optical Properties and Optoelectronic Applications

All Inorganic Halide Perovskites Nanosystem: Synthesis, Structural Features, Optical Properties and Optoelectronic Applications

Nanocrystalline/microcrystalline materials based on lead-halide units

Structural characterization of bulk and nanoparticle lead halide perovskite thin films by (S)TEM techniques

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