Amplified Spontaneous Emission from Perovskite Quantum Dots Inside a Transparent Glass

Abstract

densities, long carrier diffusion lengths, high photoluminescence quantum yield (PLQY), tunable direct bandgap, and low Auger recombination rate. [11][12][13][14] With these unique properties, a tide of intensive research on organic-inorganic halide perovskite-based amplified spontaneous emission (ASE)/laser, including but not limited to thin-film, has been conducted with the excitation of optical pumping sources. [15,16] In addition to the aforementioned medium, colloidal nanocrystals of cesium lead halide perovskites have also drawn tremendous attention due to their high stability upon exposure to optical pumping, thermal stress, and moisture. [17] At the same time, the quantization of electron energy levels of nanocrystals also contributes to narrow emission width. Since the first report on ASE from CsPbBr 3 nanocrystals, all-inorganic perovskites nanocrystals (CsPbX 3 , X = Cl, Br, I) have been dramatically developed. In particular, bandgap energies are precisely and continuously controlled through compositional regulation (mixed halide Cl/Br and Br/I) as well as quantum-size effects. [17] Another key practical advantage of CsPbX 3 nanocrystals is the easy realization of emission covering a blue-green spectral region (410-530 nm) through facile synthesis. [18] As a comparison, only an extremely small (≤5 nm) size for common metal chalcogenide nanocrystals such as CdSe can contribute to being an approach to the blue-green region; even then, the PLQY is rather low (≤5%) owing to the mid-gap trap states. [17] ASE wavelength is also tunable from visible range to near-infrared spectral range by integrating the facile processability with the merits of quantum confinement. [17] Further, CsPbX 3 nanocrystals are easy to mix with other optoelectronic materials (polymers, optical glass, and nanomaterials) for further adjustments of optical properties and application in various environments.Optical glass is an excellent medium for optical storage, amplification, and waveguide used in society, industry, and scientific research, mainly due to its unequaled optical transparency as well as prominent mechanical, chemical, and thermal resistance. [1,9,[19][20][21][22][23] The improvement and optimization of optical property are achievable by the introduction of homogeneously distributed phosphor particles/semiconductor nanocrystals in a glass matrix via embedment and/or crystallization (nucleation and crystal growth). [9,[19][20][21] In addition, the phosphors/nanocrystals inside the glass have high chemical and physical stability owing to the insulation of glass to the external moisture,The diverse optoelectronics systems can provide interesting design inspiration for photonics devices, ranging from optical modulators to light-emitting displays. With the increasing applications and requirements of optical interconnect in complex environments, an essential operation is increasingly being pursued to exploit the consolidation of various merits of basic components. Here, an optical gain from monodisperse CsPbBr 3 quantum dots cr...

Metal Halide Perovskites toward Electrically Pumped Lasers

“…8 2019 [177] CsPb 2 Br 5 microplates 800 nm, 35 fs, 1 kHz 300 538 243 4 >9 × 10 6 2020 [178] CsPbBr 3 QDs-Au core/shell 400 nm, 120 fs, 1 kHz RT 542 5 k 5.5 2020 [146] CsPbBr 3 single crystal films 400 nm, 100 fs, 1 kHz RT 540 8 3.3 1255 ± 160 2020 [150] PEA 2 FA n −1 Pb n Br 3 n+1 thin films 337 nm, 3 ns, 20 Hz RT 550 33.1 4 2020 [24] NMA 2 FA n −1 Pb n Br 3 n+1 thin films 337 nm, 3 ns, 20 Hz RT 555 16.7 4 2020 [24] MAPbBr 3 thin films 400 nm, 200 fs, 1 kHz ≈100 2020 [101] BA 3 MA 3 Pb 5 Br 16 thin films 337 nm, 3 ns, 20 Hz 13-230 554 0.18-5.8 k 2021 [179] CsPbBr 2021 [180] CsPb(Br 0.75 Cl 0.25 ) 3 QDs 355 nm, 70 fs, 15 Hz RT 498 45 6.71 2021 [180] CsPb(Br 0.6 Cl 0.4 ) 3 QDs 355 nm, 70 fs, 15 Hz RT 468 53 6.15 2021 [180] CsPbBr 3 microrods 343 nm, 290 fs, 1 kHz RT 543 10.2 10 2021 [181] PEA 2 (CsPbBr 3 ) n −1 PbBr 4 thin films 400 nm, 120 fs, 1 kHz 800 nm, 120 fs, 1 kHz 532 11.7 7.2k ≈4 622 2022 [182] CsPbBr 3 QDs inside a transparent glass 400 nm, 50 fs, 1 kHz 78-RT ≈530 7.4-100.4 ≈4 627.9-98 >12 h 2022 [183] CsPbCl 1.5 Br 1.5 thin films 355 nm, 80 fs, 1 kHz 480 6.5 5 2022 [184] but also injected into a cylindrical microcapillary tube to establish a ring cavity, [78,83,111] as shown in Figure 4d,e. Although the low lasing threshold is charming, single-mode lasers are still the further goal for their practical applications in on-chip optical processing, communication, and data storage.…”

Direct Lithography of Perovskite Quantum Dots Inside an Organic Transparent Medium

“…In recent years, crystallization of perovskite quantum dots (PQDs) inside a glass medium using a femtosecond laser has been extensively researched. − Perovskite nanocrystals induced by femtosecond laser in a solid transparent medium could possess the advantages of both crystalline materials and homogeneous medium . Transparent nanocrystal-in-glass composite combined the attractive spectroscopic properties of nanocrystals and the high transparency, extreme stability, and flexible processing properties of glass. − PQDs with variable chemical compositions and different luminescence properties have been fabricated inside glass media .…”

Enhanced Amplified Spontaneous Emission from Perovskite Films by a Multifunctional 4′‐Aminoacetophenone Hydrochloride Additive Assistant Engineering

“…[13] Inspired by the pioneering works, tremendous researches on the optically pumped laser based on the perovskite materials have been gradually reported and substantive advancement have been made. [14][15][16][17][18][19][20] To adequately probe the application potential of the perovskite materials in the field of coherent light emission or lasing, it is extremely pivotal to explore the high-quality perovskite films and achieve the low threshold, high optical gain, and long carrier transport for ASE/lasing device applications. The outstanding low-threshold optical pumping ASE will be a motivating goal to acquire electrically pumped lasing or continuous wave operation and facilitate the perovskites materials for light-emission applications.…”