CsPbX3/Cs4PbX6 core/shell perovskite nanocrystals

Jia, Chao; Lĭ, Hui; Meng, Xianghe; Li, Hongbo

doi:10.1039/c8cc02802h

Cited by 110 publications

(134 citation statements)

References 38 publications

Supporting

Mentioning

133

Contrasting

Order By: Relevance

“…Improving the stability of LHPs is currently the main strategy for overcoming the abovementioned obstacles. To date, many efforts have been devoted to this endeavor, including polymer or inorganic oxide (SiO 2 , TiO 2 , Al 2 O 3 ) encapsulation, embedding of QDs into mesoporous materials, and construction of protective shells for QDs . Although the decomposition of LHPs can be mitigated, the thick matrix does not contribute to the luminescence, so the device performance will inevitably be affected .…”

mentioning

confidence: 99%

Epitaxial Growth of CsPbX₃ (X = Cl, Br, I) Perovskite Quantum Dots via Surface Chemical Conversion of Cs₂GeF₆ Double Perovskites: A Novel Strategy for the Formation of Leadless Hybrid Perovskite Phosphors with Enhanced Stability

Wei

Cheng

et al. 2019

Advanced Materials

View full text Add to dashboard Cite

LHPs are emerging as highly efficient light emitters with a narrow full width at half-maximum (FWHM) and tunable emission throughout the visible region (400-700 nm). [3] In particular, all inorganic cesium lead halide (CsPbX 3 , X = Cl, Br, I) perovskite quantum dots (QDs) with near-unity photoluminescence quantum yields (PLQYs) in the blue, green, and red regions and high color purity have been regarded as highly efficient narrow-band phosphors for lighting and next-generation displays devices. [4] Despite their excellent optical properties together with their impressive performance in various lighting fields, LHPs have received criticism because of the toxicity of lead and the lack of long-term stability. [5] Concerning the environmental issues, tin-, bismuth-, and antimony-based analogs such as CsSnX 3 , [6] Cs 3 Bi 2 X 9 , [7] and Cs 3 Sb 2 X 9 , [8] were developed to replace the toxic lead complexes, but both the PLQYs and the stability failed to meet the requirements of practical applications. For example, CsSnX 3 suffers from a low PLQY (0.14% for CsSnBr 3 QDs); simultaneously, it is highly sensitive to oxygen, which subsequently results in severe photoluminescence (PL) quenching. [6] Recently, silverbismuth-based Cs 2 AgBiX 6 double perovskites have attracted wide attention owing to their relatively higher stability. [5a,9] Nevertheless, the PLQY (6.7% for Cs 2 AgBiCl 6 QDs) is still limited. [9a] Similarly, tin(IV)-based Cs 2 SnX 6 double perovskites Lead halide perovskites (LHPs) have received increased attention owing to their intriguing optoelectronic and photonic properties. However, the toxicity of lead and the lack of long-term stability are potential obstacles for the application of LHPs. Herein, the epitaxial synthesis of CsPbX 3 (X = Cl, Br, I) perovskite quantum dots (QDs) by surface chemical conversion of Cs 2 GeF 6 double perovskites with PbX 2 (X = Cl, Br, I) is reported. The experimental results show that the surface of the Cs

show abstract

mentioning

confidence: 99%

Epitaxial Growth of CsPbX₃ (X = Cl, Br, I) Perovskite Quantum Dots via Surface Chemical Conversion of Cs₂GeF₆ Double Perovskites: A Novel Strategy for the Formation of Leadless Hybrid Perovskite Phosphors with Enhanced Stability

Wei

Cheng

et al. 2019

Advanced Materials

View full text Add to dashboard Cite

show abstract

Section: Other Methodsmentioning

confidence: 99%

“…Unlike thermal injection and LARP methods, in situ growth of perovskite NCs provides excellent control of the size and dimension of the perovskite materials on the substrate by spin‐coating precursor solution or controlled drying or swelling techniques . After several years of development, researchers have explored in situ synthesis of different strategies, such as hard template‐assisted in situ fabrication, NC pinning, organic ammonium‐assisted in situ manufacturing, blended spin coating, controlled drying, swelling‐deswelling microencapsulation, microfluidic spinning, and in situ fabrication of perovskite NCs embedded in a crystal matrix . As shown in Figure , we choose some representative works to introduce these methods.…”

Section: Synthesis Of Perovskite Ncsmentioning

confidence: 99%

See 1 more Smart Citation

Metal halide perovskite nanocrystals and their applications in optoelectronic devices

Wang

et al. 2019

InfoMat

View full text Add to dashboard Cite

In recent years, metal halide perovskite nanocrystals (NCs) have been favored by many researchers due to their unique properties including long carrier diffusion length, high carrier mobility, tunable emission wavelength, and narrow full width at half maximum, making them great application potentials in optoelectronic devices. The photoluminescence quantum yields of perovskite NCs are nearly 100%, and the device efficiency of perovskite NC‐based light‐emitting diodes (LEDs) has been improved significantly from below 0.1% to over 20%. In addition, perovskite NC‐based solar cells and photodetectors have also developed rapidly in recent years. Here, we summarize the synthesis and the basic optoelectronic properties of metal halide perovskite NCs and introduce their applications in LEDs, solar cells, and photodetectors.

show abstract

“…Similarly, Tang et al reported a kind of CsPbBr 3 /CdS core/shell structure using a hot-injection method. Embedding CsPbBr 3 into SiO 2 or the pores of mesoporous silica can also improve the stability of the perovskite [33][34][35][36][37] . Although most inorganic matrices are dense and thermally stable, it is difficult to controllably form an inorganic protective layer covering perovskite quantum dots (QDs) due to the high synthetic temperature and relatively complicated synthesis conditions.…”

Section: Introductionmentioning

confidence: 99%

Water-induced MAPbBr3@PbBr(OH) with enhanced luminescence and stability

et al. 2020

View full text Add to dashboard Cite

Poor stability has long been one of the key issues that hinder the practical applications of lead-based halide perovskites. In this paper, the photoluminescence (PL) quantum yield (QY) of bromide-based perovskites can be increased from 2.5% to 71.54% by introducing water, and the PL QY of a sample in aqueous solution decreases minimally over 1 year. The enhanced stability and PL QY can be attributed to the water-induced methylamino lead bromide perovskite (MAPbBr 3)@PbBr(OH). We note that this strategy is universal to MAPbBr 3 , formamidine lead bromide perovskite (FAPbBr 3), inorganic lead bromide perovskite (CsPbBr 3), etc. Light-emitting devices (LEDs) are fabricated by using the as-prepared perovskite as phosphors on a 365 nm UV chip. The luminance intensity of the LED is 9549 cd/m 2 when the driven current is 200 mA, and blemishes on the surface of glass are clearly observed under the illumination of the LEDs. This work provides a new strategy for highly stable and efficient perovskites.

show abstract

CsPbX₃/Cs₄PbX₆ core/shell perovskite nanocrystals

Cited by 110 publications

References 38 publications

Epitaxial Growth of CsPbX₃ (X = Cl, Br, I) Perovskite Quantum Dots via Surface Chemical Conversion of Cs₂GeF₆ Double Perovskites: A Novel Strategy for the Formation of Leadless Hybrid Perovskite Phosphors with Enhanced Stability

Epitaxial Growth of CsPbX₃ (X = Cl, Br, I) Perovskite Quantum Dots via Surface Chemical Conversion of Cs₂GeF₆ Double Perovskites: A Novel Strategy for the Formation of Leadless Hybrid Perovskite Phosphors with Enhanced Stability

Metal halide perovskite nanocrystals and their applications in optoelectronic devices

Water-induced MAPbBr3@PbBr(OH) with enhanced luminescence and stability

Contact Info

Product

Resources

About

CsPbX3/Cs4PbX6 core/shell perovskite nanocrystals

Cited by 110 publications

References 38 publications

Epitaxial Growth of CsPbX3 (X = Cl, Br, I) Perovskite Quantum Dots via Surface Chemical Conversion of Cs2GeF6 Double Perovskites: A Novel Strategy for the Formation of Leadless Hybrid Perovskite Phosphors with Enhanced Stability

Epitaxial Growth of CsPbX3 (X = Cl, Br, I) Perovskite Quantum Dots via Surface Chemical Conversion of Cs2GeF6 Double Perovskites: A Novel Strategy for the Formation of Leadless Hybrid Perovskite Phosphors with Enhanced Stability

Metal halide perovskite nanocrystals and their applications in optoelectronic devices

Water-induced MAPbBr3@PbBr(OH) with enhanced luminescence and stability

Contact Info

Product

Resources

About

CsPbX₃/Cs₄PbX₆ core/shell perovskite nanocrystals

Epitaxial Growth of CsPbX₃ (X = Cl, Br, I) Perovskite Quantum Dots via Surface Chemical Conversion of Cs₂GeF₆ Double Perovskites: A Novel Strategy for the Formation of Leadless Hybrid Perovskite Phosphors with Enhanced Stability

Epitaxial Growth of CsPbX₃ (X = Cl, Br, I) Perovskite Quantum Dots via Surface Chemical Conversion of Cs₂GeF₆ Double Perovskites: A Novel Strategy for the Formation of Leadless Hybrid Perovskite Phosphors with Enhanced Stability