Growth, characterization and optoelectronic applications of pure-phase large-area CsPb<sub>2</sub>Br<sub>5</sub> flake single crystals

Zhang, Zhaojun; Zhu, Yanming; Wang, Weiliang; Zheng, Wei; Lin, Rijia; Huang, Feng

doi:10.1039/c7tc04834c

Cited by 98 publications

(112 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[1] Recently, the IWE has achieved great effects in low-dimensional (1D/2D) organic-inorganic lead halides. [4][5][6][7] Based on this circumstance, all-inorganic lead-free metal halides possess more prominent prospect in a stable, efficient, and eco-friendly white lighting. [4][5][6][7] Based on this circumstance, all-inorganic lead-free metal halides possess more prominent prospect in a stable, efficient, and eco-friendly white lighting.…”

Section: Doi: 101002/adma201905079mentioning

confidence: 99%

All‐Inorganic CsCu₂I₃ Single Crystal with High‐PLQY (≈15.7%) Intrinsic White‐Light Emission via Strongly Localized 1D Excitonic Recombination

et al. 2019

Self Cite

View full text Add to dashboard Cite

In order to achieve a high quantum efficiency, doping crystals with appropriate elements such as sodium cations (ref. [8]) to reduce electronic dimension is a useful method. [5,8] However, doping also tends to cause nonradiation recombination loss. [13] Therefore, a reliable and promising way is to synthesize high-quality inorganic metal halide single crystal (SC) with natural lowdimensional structure to realize stable and high quantum efficiency white-light illumination application.In this work, we successfully synthesized 1D CsCu 2 I 3 SC by replacing toxic Pb with eco-friendly and abundant Cu, and organic molecules with large-radius Cs. [12,13] The "one dimension" we noted here is localized dimension of electron. [14] Through density functional theory (DFT) calculation, in 1D CsCu 2 I 3 SC, [Cu 2 I 3 ] − octahedra contributes most electronic states, and Cs + only forms a 1D electronic structure with isolated [Cu 2 I 3 ] − in 2D direction. Therefore, CsCu 2 I 3 SC obtains a high photoluminescence quantum yield (PLQY ≈15.7%) of the IWE at room temperature. [2] We also calculated that the crystal has a high radiation recombination rate which is owning to the 1D localized electronic structure, and this rate is the key to its high PLQY. [15,16] Under a strong injection and atmospheric environment, the PL intensity of all-inorganic CsCu 2 I 3 SC only decays about 5% after 750 min ( Figure S5, Supporting Information). This excellent stability demonstrates that the all-inorganic CsCu 2 I 3 SC possesses a great prospect in high-efficiency lighting applications.High-quality CsCu 2 I 3 SCs were synthesized by antisolvent infiltration method. [17,18] Cesium iodide and cuprous (I) iodide in certain ratio were dissolved in dimethyl formamide (DMF)dimethyl sulfoxide (DMSO) (4:1) to obtain a saturated solution. Then, methanol (antisolvent) was slowly dropped into the saturated solution to form a white precipitate (the white precipitate quickly dissolved again) until it no longer dissolved. The solution was filtered and then placed in a beaker with methanol atmosphere to grow crystals. Several days later, centimeter-scale high-quality CsCu 2 I 3 SCs were obtained (refer to the Supporting information and the Experimental Section for more details). Figure 1a shows an optical image of a rod-shaped CsCu 2 I 3 SCs excited by ultraviolet light. The SC has a size of about 10 mm × 1.5 mm, being colorless and transparent at room temperature but having strong white-light emission under ultraviolet light. Crystal structure of the CsCu 2 I 3 SC was obtained through single-crystal X-ray diffraction (SCXRD) test (Figure 1b,c), which belongs to orthorhombic system. The 1D Energy-saving white lighting from the efficient intrinsic emission of semiconductors is considered as a next-generation lighting source. Currently, white-light emission can be composited with a blue light-emitting diode and yellow phosphor. However, this solution has an inevitable light loss, which makes the improvement of the energy utilization efficiency more difficult. T...

show abstract

Section: Doi: 101002/adma201905079mentioning

confidence: 99%

All‐Inorganic CsCu₂I₃ Single Crystal with High‐PLQY (≈15.7%) Intrinsic White‐Light Emission via Strongly Localized 1D Excitonic Recombination

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…[40][41][42][43][44][45][46][47][48] However, taking CsPbBr 3 as an example, even though the Cs : Pb : Br ratio is set precisely to 1 : 1 : 3 in the precursor, the nal products are always accompanied by CsPb 2 Br 5 impurities, which are known as nonemissive wide bandgap components. [49][50][51][52] These impurities introduce undesired energy states and act as charge blockers, decreasing the charge mobility. 53 We propose the nonuniform precursor release rate to be the main cause of the formation of CsPb 2 Br 5 byproducts, and this general idea is demonstrated here.…”

Section: Introductionmentioning

confidence: 99%

Methanol-induced fast CsBr release results in phase-pure CsPbBr₃ perovskite nanoplatelets

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Finally, it is interesting to note that the CsPb 2 Br 5 phase, which is a layered 2D structure, is currently facing the same green PL discussion as Cs 4 PbBr 6 . Various different optical properties have been reported, ranging from a nonluminescent wide indirect bandgap material 52,103−105 to a green material with strong green PL (again, around 515 nm). 22,106−109 …”

mentioning

confidence: 99%

Zero-Dimensional Cesium Lead Halides: History, Properties, and Challenges

Akkerman

Abdelhady

Manna

2018

J. Phys. Chem. Lett.

232

247

View full text Add to dashboard Cite

Over the past decade, lead halide perovskites (LHPs) have emerged as new promising materials in the fields of photovoltaics and light emission due to their facile syntheses and exciting optical properties. The enthusiasm generated by LHPs has inspired research in perovskite-related materials, including the so-called “zero-dimensional cesium lead halides”, which will be the focus of this Perspective. The structure of these materials is formed of disconnected lead halide octahedra that are stabilized by cesium ions. Their optical properties are dominated by optical transitions that are localized within the individual octahedra, hence the title “‘zero-dimensional perovskites”. Controversial results on their physical properties have recently been reported, and the true nature of their photoluminescence is still unclear. In this Perspective, we will take a close look at these materials, both as nanocrystals and as bulk crystals/thin films, discuss the contrasting opinions on their properties, propose potential applications, and provide an outlook on future experiments.

show abstract

Growth, characterization and optoelectronic applications of pure-phase large-area CsPb₂Br₅ flake single crystals

Abstract: Wide band gap CsPb2Br5 flake single crystals have been successfully obtained and demonstrated to have potential applications in deep-UV photodetection.

Cited by 98 publications

References 22 publications

All‐Inorganic CsCu₂I₃ Single Crystal with High‐PLQY (≈15.7%) Intrinsic White‐Light Emission via Strongly Localized 1D Excitonic Recombination

All‐Inorganic CsCu₂I₃ Single Crystal with High‐PLQY (≈15.7%) Intrinsic White‐Light Emission via Strongly Localized 1D Excitonic Recombination

Methanol-induced fast CsBr release results in phase-pure CsPbBr₃ perovskite nanoplatelets

Zero-Dimensional Cesium Lead Halides: History, Properties, and Challenges

Contact Info

Product

Resources

About

Growth, characterization and optoelectronic applications of pure-phase large-area CsPb2Br5 flake single crystals

Abstract: Wide band gap CsPb2Br5 flake single crystals have been successfully obtained and demonstrated to have potential applications in deep-UV photodetection.

Cited by 98 publications

References 22 publications

All‐Inorganic CsCu2I3 Single Crystal with High‐PLQY (≈15.7%) Intrinsic White‐Light Emission via Strongly Localized 1D Excitonic Recombination

All‐Inorganic CsCu2I3 Single Crystal with High‐PLQY (≈15.7%) Intrinsic White‐Light Emission via Strongly Localized 1D Excitonic Recombination

Methanol-induced fast CsBr release results in phase-pure CsPbBr3 perovskite nanoplatelets

Zero-Dimensional Cesium Lead Halides: History, Properties, and Challenges

Contact Info

Product

Resources

About

Growth, characterization and optoelectronic applications of pure-phase large-area CsPb₂Br₅ flake single crystals

All‐Inorganic CsCu₂I₃ Single Crystal with High‐PLQY (≈15.7%) Intrinsic White‐Light Emission via Strongly Localized 1D Excitonic Recombination

All‐Inorganic CsCu₂I₃ Single Crystal with High‐PLQY (≈15.7%) Intrinsic White‐Light Emission via Strongly Localized 1D Excitonic Recombination

Methanol-induced fast CsBr release results in phase-pure CsPbBr₃ perovskite nanoplatelets