Photonics and Optoelectronics of 2D Metal‐Halide Perovskites

Qi, Xiang; Zhang, Yupeng; Ou, Qingdong; Ha, Son Tung; Qiu, Cheng; Zhang, Han; Cheng, Yi; Xiong, Qihua; Bao, Qiaoliang

doi:10.1002/smll.201800682

Cited by 179 publications

(115 citation statements)

References 155 publications

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“…Hence, they could bring perovskite‐based optoelectronic devices closer to their commercialization, once their main weaknesses of toxicity and low stability are addressed . Synthesis, characterization, and applications of a wide set of PNCs have been intensively investigated during the last few years, and the key results are summarized in several good reviews . However, a comprehensive overview of halide PNCs, with special emphasis on their intriguing optoelectronic properties in relation to the emerging applications, is not yet thoroughly reported.…”

Section: Introductionmentioning

confidence: 99%

Halide Perovskite Nanocrystals for Next‐Generation Optoelectronics

Liu

Zhang

Gedamu

et al. 2019

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Colloidal perovskite nanocrystals (PNCs) combine the outstanding optoelectronic properties of bulk perovskites with strong quantum confinement effects at the nanoscale. Their facile and low‐cost synthesis, together with superior photoluminescence quantum yields and exceptional optical versatility, make PNCs promising candidates for next‐generation optoelectronics. However, this field is still in its early infancy and not yet ready for commercialization due to several open challenges to be addressed, such as toxicity and stability. Here, the key synthesis strategies and the tunable optical properties of PNCs are discussed. The photophysical underpinnings of PNCs, in correlation with recent developments of PNC‐based optoelectronic devices, are especially highlighted. The final goal is to outline a theoretical scaffold for the design of high‐performance devices that can at the same time address the commercialization challenges of PNC‐based technology.

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Section: Introductionmentioning

confidence: 99%

Halide Perovskite Nanocrystals for Next‐Generation Optoelectronics

Liu

Zhang

Gedamu

et al. 2019

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“…Nevertheless, graphene as all‐optical device was limited by its weak modulation depth and zero bandgap. Enlighten by the discovery of graphene, several types of graphene‐like 2D materials have been reported, mono‐elemental materials like Group‐IVA and Group VA mono‐elemental materials, transition metal dichalcogenides, hexagonal boron nitrides, metal oxides, hydroxides, perovskites, etc.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Few‐Layer MXene‐Assisted All‐Optical Wavelength Conversion at Telecommunication Band

Song

Chen

Jiang

et al. 2019

Advanced Optical Materials

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logic operations, and buffering, are still lacking in practically usable forms. It is still challenging to improve the optical device performance for practical applications, including reducing footprint size, required optical power levels, and device performance regarding nonlinear transfer characteristics. Wavelength conversion between adjacent channels is one of the essential functions in advanced optical networks. As a crucial component in the optical communication system, alloptical wavelength converter should be with advantages of high speed, bit rate transparency, low chirp, and no extinction ratio degradation. [4,5] Wavelength conversion in the optical system was typically realized by utilizing the parametric nonlinear optical effect, including cross gain modulation (XGM), [6] four-wave mixing (FWM), [7][8][9][10][11][12][13] and cross phase modulation (XPM) effect. [14,15] These nonlinear optical wavelength converters were typically realized in semiconductor optical amplifiers (SOA). [6] By using the SOAs, the XGM-based method is highly power efficient and polarization independent but suffers from high extinction ratio degradation. Besides, only converted signal can be obtained in the desired wavelength through the XGM-based method. The XPM-based method can convert signal to the target wavelength with converted signal into a SOA-Mach-Zehnder interferometer structure. [16] However, the input power of the XPM-based method is limited in a certain range and has to be integrated. FWM method is attractive because it is transparent to modulation format and capable of transmitting high bit rate signals. [6] FWM methods typically suffer from low conversion efficiency and fast decrease on efficiency as wavelength span increases. Researchers have also investigated other nonlinear optical methods to realize the wavelength conversion, such as highly nonlinear optical fiber, [17] nonlinear optical loop mirror, [18] optical filtering, [19] or based on time-domain holography [20] and so on. These previous methods suffer from high cost, unstable, bulky, or difficult to be compatible in the fiber system.In the last decade, novel materials-based optical devices are considered as an effective solution. Silicon was considered to be with great potential in the optical signal processing system as it is transparent at the near-and mid-infrared telecommunication regime and with high nonlinearity. [21][22][23][24] Silicon waveguides have been reported as optical wavelength converter in the photonic signal processing system. [25,26] For the all-optical applications utilizing the third-order nonlinear properties of Optical signal processing based on 2D materials is a hot topic which has attracted rising interests. As a novel class of 2D material, MXene is becoming a promising nonlinear photonics material. In this contribution, MXene Ti 3 C 2 T x , prepared by liquid acid etching method, is developed as a novel all-optical device by depositing on a microfiber, which shows an excellent nonlinear optical response at the telecommunicati...

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“…Among them, 2D perovskites have attracted increasing research interest and been applied to diverse fields, such as light‐emitting diodes (LEDs), solar cells, and PDs, because of the advantages peculiar to them . First, inherited from their bulk counterparts and originated from their reduced dimension, 2D perovskites exhibit a variety of intriguing properties, including tunable bandgap, high photoconductive gain, high photoluminescence (PL) efficiency, and nonlinear optical properties . Second, it is found that many properties of 2D perovskites are strongly dependent on their thickness, and the properties show increased sensitivity to applied external fields owing to their ultrathin thickness .…”

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confidence: 99%

2D Perovskite Sr₂Nb₃O₁₀ for High‐Performance UV Photodetectors

et al. 2019

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2D perovskites, due to their unique properties and reduced dimension, are promising candidates for future optoelectronic devices. However, the development of stable and nontoxic 2D wide‐bandgap perovskites remains a challenge. 2D all‐inorganic perovskite Sr2Nb3O10 (SNO) nanosheets with thicknesses down to 1.8 nm are synthesized by liquid exfoliation, and for the first time, UV photodetectors (PDs) based on individual few‐layer SNO sheets are investigated. The SNO sheet‐based PDs exhibit excellent UV detecting performance (narrowband responsivity = 1214 A W−1, external quantum efficiency = 5.6 × 105%, detectivity = 1.4 × 1014 Jones @270 nm, 1 V bias), and fast response speed (trise ≈ 0.4 ms, tdecay ≈ 40 ms), outperforming most reported individual 2D sheet‐based UV PDs. Furthermore, the carrier transport properties of SNO and the performance of SNO‐based phototransistors are successfully controlled by gate voltage. More intriguingly, the photodetecting performance and carrier transport properties of SNO sheets are dependent on their thickness. In addition, flexible and transparent PDs with high mechanical stability are easily fabricated based on SNO nanosheet film. This work sheds light on the development of high‐performance optoelectronics based on low‐dimensional wide‐bandgap perovskites in the future.

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Photonics and Optoelectronics of 2D Metal‐Halide Perovskites

Cited by 179 publications

References 155 publications

Halide Perovskite Nanocrystals for Next‐Generation Optoelectronics

Halide Perovskite Nanocrystals for Next‐Generation Optoelectronics

Nonlinear Few‐Layer MXene‐Assisted All‐Optical Wavelength Conversion at Telecommunication Band

2D Perovskite Sr₂Nb₃O₁₀ for High‐Performance UV Photodetectors

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Photonics and Optoelectronics of 2D Metal‐Halide Perovskites

Cited by 179 publications

References 155 publications

Halide Perovskite Nanocrystals for Next‐Generation Optoelectronics

Halide Perovskite Nanocrystals for Next‐Generation Optoelectronics

Nonlinear Few‐Layer MXene‐Assisted All‐Optical Wavelength Conversion at Telecommunication Band

2D Perovskite Sr2Nb3O10 for High‐Performance UV Photodetectors

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2D Perovskite Sr₂Nb₃O₁₀ for High‐Performance UV Photodetectors