High intensity photoluminescence of microcrystalline CsPbBr3 films: Evidence for enhanced stimulated emission at room temperature

Kondo, Shinichi; Takahashi, Kiyonori; Nakanish, T.; Saito, T.; Asada, Hiroshi; Nakagawa, Hideyuki

doi:10.1016/j.cap.2005.08.001

Cited by 62 publications

(53 citation statements)

References 15 publications

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“…Our initial study focused on CsPbBr 3 nanowires, as previous reports suggest this composition is strongly photoluminescent (26,34) and capable of stimulated emission (29)(30)(31). Although we have already reported the synthesis of colloidal CsPbBr 3 nanowires (34), those nanowires are too narrow (∼20-nm diameter) to efficiently confine the 535-nm emission and are therefore unable to support photonic lasing (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…With strikingly similar optical and electronic properties, cesium lead halide perovskites are favorable materials for laser gain media (26,27). Whereas early studies revealed wide stoichiometric emission wavelength tunability (28), stimulated emission for all-inorganic perovskites was not reported until 2007 in thin films of CsPbBr 3 (29,30). Recent reports have expanded the versatility of the cesium lead halides by demonstrating amplified spontaneous emission in a variety of CsPbX 3 compositions and alloys, as well as whispering gallery mode lasing in coated silica beads and microcrystals (31)(32)(33).…”

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confidence: 99%

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Lasing in robust cesium lead halide perovskite nanowires

Eaton

Lai

Gibson

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

700

723

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The rapidly growing field of nanoscale lasers can be advanced through the discovery of new, tunable light sources. The emission wavelength tunability demonstrated in perovskite materials is an attractive property for nanoscale lasers. Whereas organic-inorganic lead halide perovskite materials are known for their instability, cesium lead halides offer a robust alternative without sacrificing emission tunability or ease of synthesis. Here, we report the low-temperature, solution-phase growth of cesium lead halide nanowires exhibiting low-threshold lasing and high stability. The as-grown nanowires are single crystalline with well-formed facets, and act as high-quality laser cavities. The nanowires display excellent stability while stored and handled under ambient conditions over the course of weeks. Upon optical excitation, Fabry-Pérot lasing occurs in CsPbBr 3 nanowires with an onset of 5 μJ cm −2 with the nanowire cavity displaying a maximum quality factor of 1,009 ± 5. Lasing under constant, pulsed excitation can be maintained for over 1 h, the equivalent of 10 9 excitation cycles, and lasing persists upon exposure to ambient atmosphere. Wavelength tunability in the green and blue regions of the spectrum in conjunction with excellent stability makes these nanowire lasers attractive for device fabrication.nanowire | perovskite | laser | inorganic | stability M iniaturized light sources hold great promise for advancing the field of optoelectronics. The development of highly stable, wavelength-tunable light sources on the nanoscale can unlock the potential for commercial applications in optical communications (1, 2), sensing (3), imaging (4), and data storage (5), among many others. Nanowire lasers represent one promising approach toward miniaturized light sources. Acting both as the laser cavity and gain medium (6), nanowires may be easily incorporated into optoelectronic circuits based on their size as well as recent advances in electrical pumping (7-10). A wide range of nanowire lasers has been reported consisting of a multitude of compositions including many II-VI and III-V semiconductors (11). Unfortunately, fabrication of many of these nanowires requires expensive hightemperature or low-pressure conditions. Additionally, whereas most are stable under ambient conditions, only a few of these materials have demonstrated broad wavelength tunability. The recent discovery of the favorable properties of methyl ammonium lead halide perovskite materials has triggered a paradigm shift in what is possible in optoelectronics. Stoichiometric wavelength tunability, low trap state density, solution-phase processability, as well as excellent light absorption and emission, make these materials well suited to applications in solar cells (12-15), light-emitting diodes (16, 17), photodetectors (18, 19), and lasers (20)(21)(22).Recently, Zhu et al. reported low lasing thresholds and recordbreaking quality factors for methyl ammonium lead halide (CH 3 NH 3 PbX 3 , X = I, Br, Cl) nanowire lasers as well as excellent wavelength tuna...

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Lasing in robust cesium lead halide perovskite nanowires

Eaton

Lai

Gibson

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

700

723

View full text Add to dashboard Cite

show abstract

“…Such experimentally obtained E b values are in well accordance with previous theoretical predicts of CsPbBr 3 QDs, but slightly higher than that of bulk CsPbBr 3 (35 meV), which should be due to quantum confi nement effect. [31][32][33] More importantly, these values are much higher than the thermal disturbance energy at RT (≈26 meV), and than that of GaN (25 meV), which ensures the generation of exitons at RT and their high-rate recombination, and hence induces outstanding PL properties, even stimulated emission at RT [ 12 ] t A t A t A( ) exp exp …”

Section: Mev Exciton Binding Energy and 46 Mev Optical Phononmentioning

confidence: 98%

CsPbX₃ Quantum Dots for Lighting and Displays: Room‐Temperature Synthesis, Photoluminescence Superiorities, Underlying Origins and White Light‐Emitting Diodes

Zhang

et al. 2016

Adv Funct Materials

2,124

105

1,805

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2435wileyonlinelibrary.com IntroductionQuantum dots (QDs), combined with unique optical, electrical properties and solution processed functional applications, have been studied intensively for decades. [ 1,2 ] Recently, Kovalenko and co-workers and Li and co-workers developed CsPbX 3 (X = Cl, Br, I) inorganic perovskite quantum dots (IPQDs), which exhibited ultrahigh photoluminescence (PL) quantum yields (QYs), lowthreshold lasing, and multicolor electroluminescence. However, the usual synthesis needs high temperature, inert gas protection, and localized injection operation, which are severely against applications. Moreover, the so unexpectedly high QYs are very confusing. Here, for the fi rst time, the IPQDs' roomtemperature (RT) synthesis, superior PL, underlying origins and potentials in lighting and displays are reported. The synthesis is designed according to supersaturated recrystallization (SR), which is operated at RT, within few seconds, free from inert gas and injection operation. Although formed at RT, IPQDs' PLs have QYs of 80%, 95%, 70%, and FWHMs of 35, 20, and 18 nm for red, green, and blue emissions. As to the origins, the observed 40 meV exciton binding energy, halogen self-passivation effect, and CsPbX 3 @X quantumwell band alignment are proposed to guarantee the excitons generation and high-rate radiative recombination at RT. Moreover, such superior optical merits endow them with promising potentials in lighting and displays, which are primarily demonstrated by the white light-emitting diodes with tunable color temperature and wide color gamut.

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“…[32] Improved performance was observed by modulating the precursor stoichiometry during thin-film formation with an excess of CsBr (CsBr:PbBr 2 = 2:1) showing nearly 300% improvement in luminescence over the stoichiometric compositions. Besides the increased thermal stability compared to the CH 3 NH 3 PbX 3 family, bulk CsPbBr 3 exhibits other attractive features for lightemitting applications, such as long PL life-time (≈2.5 μs) and electron mobility (≈10 3 cm 2 V −1 s −1 , comparable electron and hole mobility/life-time products, [45] small exciton binding energy (≈35 meV), [46] and potentially better ambient stability.…”

Section: Reviewmentioning

confidence: 99%

Perovskite Materials for Light‐Emitting Diodes and Lasers

et al. 2016

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Organic-inorganic hybrid perovskites have cemented their position as an exceptional class of optoelectronic materials thanks to record photovoltaic efficiencies of 22.1%, as well as promising demonstrations of light-emitting diodes, lasers, and light-emitting transistors. Perovskite materials with photoluminescence quantum yields close to 100% and perovskite light-emitting diodes with external quantum efficiencies of 8% and current efficiencies of 43 cd A(-1) have been achieved. Although perovskite light-emitting devices are yet to become industrially relevant, in merely two years these devices have achieved the brightness and efficiencies that organic light-emitting diodes accomplished in two decades. Further advances will rely decisively on the multitude of compositional, structural variants that enable the formation of lower-dimensionality layered and three-dimensional perovskites, nanostructures, charge-transport materials, and device processing with architectural innovations. Here, the rapid advancements in perovskite light-emitting devices and lasers are reviewed. The key challenges in materials development, device fabrication, operational stability are addressed, and an outlook is presented that will address market viability of perovskite light-emitting devices.

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High intensity photoluminescence of microcrystalline CsPbBr3 films: Evidence for enhanced stimulated emission at room temperature

Cited by 62 publications

References 15 publications

Lasing in robust cesium lead halide perovskite nanowires

Lasing in robust cesium lead halide perovskite nanowires

CsPbX₃ Quantum Dots for Lighting and Displays: Room‐Temperature Synthesis, Photoluminescence Superiorities, Underlying Origins and White Light‐Emitting Diodes

Perovskite Materials for Light‐Emitting Diodes and Lasers

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High intensity photoluminescence of microcrystalline CsPbBr3 films: Evidence for enhanced stimulated emission at room temperature

Cited by 62 publications

References 15 publications

Lasing in robust cesium lead halide perovskite nanowires

Lasing in robust cesium lead halide perovskite nanowires

CsPbX3 Quantum Dots for Lighting and Displays: Room‐Temperature Synthesis, Photoluminescence Superiorities, Underlying Origins and White Light‐Emitting Diodes

Perovskite Materials for Light‐Emitting Diodes and Lasers

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CsPbX₃ Quantum Dots for Lighting and Displays: Room‐Temperature Synthesis, Photoluminescence Superiorities, Underlying Origins and White Light‐Emitting Diodes