All‐Inorganic Colloidal Perovskite Quantum Dots: A New Class of Lasing Materials with Favorable Characteristics

Wang, Yue; Li, Xiaoming; Song, Jizhong; Lian, Xiao; Zeng, Haibo; Sun, Handong

doi:10.1002/adma.201503573

Cited by 1,163 publications

(1,041 citation statements)

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“…In CsPbX 3 quantum dots, support for both single-exciton and biexciton lasing has been demonstrated (31,33). In the case of biexciton-driven stimulated emission, a 50-meV red-shifted emission band was assigned to biexciton recombination, in agreement with expected biexciton binding energies in CsPbX 3 quantum dots (37).…”

Section: Resultssupporting

confidence: 65%

“…Cesium lead halide materials have been shown to be stable when exposed to atmospheric water or heat, making them attractive for real-world application (27,33). The CsPbBr 3 nanowires reported here are stable for days under ambient atmosphere and illumination without loss of morphology.…”

Section: Resultsmentioning

confidence: 82%

“…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). Whereas these recent works have highlighted the impressive properties of cesium lead halide perovskites in terms of their optical properties and tunability, the growth and characterization of cesium lead halide nanowires capable of lasing has not yet been achieved.…”

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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.

716

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: Resultssupporting

confidence: 65%

Section: Resultsmentioning

confidence: 82%

mentioning

confidence: 99%

See 1 more Smart Citation

Lasing in robust cesium lead halide perovskite nanowires

Eaton

Lai

Gibson

et al. 2016

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

716

723

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“…In addition, a CsPb(Br/Cl) 3 film presented laser lines as narrow as 0.14 nm, due to a random feedback effect. Amplification properties of perovskite QDs have also been studied by Wang et al [107] by optically pumping close packed films of CsPbBr nanocrystals with sizes between 5.5 nm and 9 nm. These nanocrystals presented useful properties for optical amplification because they exhibit a quantum yield as high 30001-p16 I. Suárez Alvarez: Active photonic devices based on colloidal semiconductor nanocrystals and organometallic halide perovskites as 90% and reduced Auger non radiative recombination (down to two fold) respect that found in colloidal II-IV nanocrystals.…”

Section: -P15mentioning

confidence: 99%

“…Therefore, HPVKs layers have been successfully applied in a wide range of photonic devices, such as photodetectors [91,92] or light emitting diodes [90,93]. In addition, since HPVKs present a fast carrier formation and long recombination time, they are promising materials to reduce the stimulated emission threshold in active devices [94][95][96][97][98][99][100][101][102][103][104][105][106][107][108][109], as it has been nicely reviewed in [90].…”

Section: -P14mentioning

confidence: 99%

Active photonic devices based on colloidal semiconductor nanocrystals and organometallic halide perovskites

Suárez¹

2016

Eur. Phys. J. Appl. Phys.

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Abstract. Semiconductor nanocrystals have arisen as outstanding materials to develop a new generation of optoelectronic devices. Their fabrication under simple and low cost colloidal chemistry methods results in cheap nanostructures able to provide a wide range of optical functionalities. Their attractive optical properties include a high absorption cross section below the band gap, a high quantum yield emission at room temperature, or the capability of tuning the band-gap with the size or the base material. In addition, their solution process nature enables an easy integration on several substrates and photonic structures. As a consequence, these nanoparticles have been extensively proposed to develop several photonic applications, such as detection of light, optical gain, generation of light or sensing. This manuscript reviews the great effort undertaken by the scientific community to construct active photonic devices based on these nanoparticles. The conditions to demonstrate stimulated emission are carefully studied by comparing the dependence of the optical properties of the nanocrystals with their size, shape and composition. In addition, this paper describes the design of different photonic architectures (waveguides and cavities) to enhance the generation of photoluminescence, and hence to reduce the threshold of optical gain. Finally, semiconductor nanocrystals are compared to organometallic halide perovskites, as this novel material has emerged as an alternative to colloidal nanoparticles.

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