High-performance transparent ultraviolet photodetectors based on inorganic perovskite CsPbCl<sub>3</sub> nanocrystals

Zhang, Jingru; Wang, Qian; Zhang, Xisheng; Jiang, Jiexuan; Gao, Zhenfei; Jin, Zhiwen; Liu, Shengzhong

doi:10.1039/c7ra06597c

Cited by 100 publications

(90 citation statements)

References 59 publications

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“…The onset of the dual absorption peaks at ≈395 and ≈365 nm of CsPb 1− x Mg x Cl 3 NCs for x ≤ 10% with decreasing intensity of peak intensity at ≈365 nm is in consistent with the shape varied NCs distribution, reflected in TEM images. The sharp peak at the longer wavelength (≈395 nm) and a shoulder peak at the shorter wavelength (≈365 nm) can be ascribed to the distribution of nanocubes and nanoplatelets, respectively, as reported in an earlier study . The intensity of the shoulder peak at ≈365 nm successively decreases with an increase in the content of Mg 2+ , manifesting the distribution of nanoplatelets like structure to be thinner but enhancing the assembling of cube‐like structure to be more pronounced.…”

Section: Resultssupporting

confidence: 78%

Mg²⁺‐Alloyed All‐Inorganic Halide Perovskites for White Light‐Emitting Diodes by 3D‐Printing Method

Adhikari

Thapa

Zhu

et al. 2019

Advanced Optical Materials

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All‐inorganic halide perovskites (CsPbX3, X = Cl−, Br−, and I−) are brought to the forefront of research focus in the field of modern lighting technology. However, due to the toxic element (Pb2+), environmentally friendly white‐light emissions are difficult to achieve, thus limiting their practical applications. Herein, high‐quality Mg2+‐alloyed CsPb1−x Mgx X3 (up to 20%) nanocrystals (NCs) are synthesized. The structural and optical properties are investigated. The application of these NCs in white‐light‐emitting diodes (LEDs) is also demonstrated. The incorporation of Mg2+ into CsPb1−x Mgx X3 NCs results in a lattice contraction without a change in structure and morphology, blue‐shifts in the photoluminescence emission, and increased bandgap. Then, the tunable emission (≈408–650 nm) is obtained by adjusting the compositions of different halides (for 20% Mg2+). Most importantly, for the first time, 3D printed thin color conversion layers for different color emitting NCs (green, yellow, and red) are stacked on top of the blue‐LEDs to achieve high‐quality white light emission. A bright neutral white‐light with a correlated‐color temperature of 5806 K, a high color‐rendering index of 89, CIE coordinates of (0.32, 0.33), a small Duv (<0.003), and high luminous efficacy of radiation of 280 lm W−1 is achieved.

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Section: Resultssupporting

confidence: 78%

Mg²⁺‐Alloyed All‐Inorganic Halide Perovskites for White Light‐Emitting Diodes by 3D‐Printing Method

Adhikari

Thapa

Zhu

et al. 2019

Advanced Optical Materials

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“…9,13 For example, Liu et al presented photodetectors made of CsPbCl 3 nanocrystals, which exhibited a good photoresponse to UV light. 14 Han and co-workers reported CsPbBr 3 microcrystal based photodetectors with high on/off ratios as well as a fast response speed, 15 and Fan et al demonstrated CsPbI 3 nanowire congured array-photodetectors, which had a stabilized cubic phase and exhibited high responsivity. 16 Apart from that, the excellent emission efficiency and tunable emission color of CsPbX 3 QDs benet from the quantum size effect and anion exchange, and make them potential candidates in high quantum efficiency and low-cost LEDs.…”

Section: Introductionmentioning

confidence: 99%

Enhanced performance of ZnO nanoparticle decorated all-inorganic CsPbBr₃ quantum dot photodetectors

Shen

et al. 2019

J. Mater. Chem. A

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“…In comparison with other perovskite‐based photodetectors, our devices deliver competitive or even superior performance, as summarized in Table 1 . [ 50–58 ] According to the map color variation, over 80% devices exhibited similar performance, indicating spatial photoresponse uniformity.…”

Section: Figurementioning

confidence: 99%

Flexible and Self‐Powered Photodetector Arrays Based on All‐Inorganic CsPbBr₃ Quantum Dots

Shen

et al. 2020

Advanced Materials

161

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high-performance photodetection is highly desirable in various fields, including optical communication, imaging, and environmental monitoring. [4][5][6] Currently, GaN, Si, InGaAs, and other semiconductors have dominated the ultraviolet to near-infrared photodetection market. [7][8][9][10] These detectors are mostly assembled on rigid substrates and usually require relatively thick active materials for photonic detection, therefore, they are not compatible with flexible systems or suitable for low cost manufacturing.The demand for flexible devices has driven the research in emerging functional materials that are bendable. To date, various functional materials have been explored for constructing flexible photodetectors, such as zero-dimensional (0D) semiconductor nanostructures, 2D layered materials, and perovskites. [11][12][13][14] They can be facilely transferred to arbitrary rigid substrates and directly deposited on flexible substrates, which are favorable for flexible optoelectronics. Particularly, organometal halide perovskites (OHPs) have demon strated intriguing properties, including large absorption coefficients, tunable bandgaps, long carrier diffusion length, and high carrier mobility. [15][16][17][18][19][20] Nevertheless, their organic parts Flexible devices are garnering substantial interest owing to their potential for wearable and portable applications. Here, flexible and self-powered photodetector arrays based on all-inorganic perovskite quantum dots (QDs) are reported. CsBr/KBr-mediated CsPbBr 3 QDs possess improved surface morphology and crystallinity with reduced defect densities, in comparison with the pristine ones. Systematic material characterizations reveal enhanced carrier transport, photoluminescence efficiency, and carrier lifetime of the CsBr/KBr-mediated CsPbBr 3 QDs. Flexible photodetector arrays fabricated with an optimum CsBr/KBr treatment demonstrate a high open-circuit voltage of 1.3 V, responsivity of 10.1 A W −1 , specific detectivity of 9.35 × 10 13 Jones, and on/off ratio up to ≈10 4 . Particularly, such performance is achieved under the self-powered operation mode. Furthermore, outstanding flexibility and electrical stability with negligible degradation after 1600 bending cycles (up to 60°) are demonstrated. More importantly, the flexible detector arrays exhibit uniform photoresponse distribution, which is of much significance for practical imaging systems, and thus promotes the practical deployment of perovskite products.The "Internet of Things" (IoT) has been expected to reshape or even revolutionize human daily lives. As a fundamental technology of the IoT, flexible optoelectronics, such as solar power sources, display panels, and photodetectors, have attracted substantial research interest globally. [1][2][3] Moreover,

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High-performance transparent ultraviolet photodetectors based on inorganic perovskite CsPbCl₃ nanocrystals

Abstract: Fully transparent ultraviolet photodetectors (PDs) based on the CsPbCl3 nanocrystals (NCs) were fabricated for the first time.

Cited by 100 publications

References 59 publications

Mg²⁺‐Alloyed All‐Inorganic Halide Perovskites for White Light‐Emitting Diodes by 3D‐Printing Method

Mg²⁺‐Alloyed All‐Inorganic Halide Perovskites for White Light‐Emitting Diodes by 3D‐Printing Method

Enhanced performance of ZnO nanoparticle decorated all-inorganic CsPbBr₃ quantum dot photodetectors

Flexible and Self‐Powered Photodetector Arrays Based on All‐Inorganic CsPbBr₃ Quantum Dots

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High-performance transparent ultraviolet photodetectors based on inorganic perovskite CsPbCl3 nanocrystals

Abstract: Fully transparent ultraviolet photodetectors (PDs) based on the CsPbCl3 nanocrystals (NCs) were fabricated for the first time.

Cited by 100 publications

References 59 publications

Mg2+‐Alloyed All‐Inorganic Halide Perovskites for White Light‐Emitting Diodes by 3D‐Printing Method

Mg2+‐Alloyed All‐Inorganic Halide Perovskites for White Light‐Emitting Diodes by 3D‐Printing Method

Enhanced performance of ZnO nanoparticle decorated all-inorganic CsPbBr3 quantum dot photodetectors

Flexible and Self‐Powered Photodetector Arrays Based on All‐Inorganic CsPbBr3 Quantum Dots

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Product

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High-performance transparent ultraviolet photodetectors based on inorganic perovskite CsPbCl₃ nanocrystals

Mg²⁺‐Alloyed All‐Inorganic Halide Perovskites for White Light‐Emitting Diodes by 3D‐Printing Method

Mg²⁺‐Alloyed All‐Inorganic Halide Perovskites for White Light‐Emitting Diodes by 3D‐Printing Method

Enhanced performance of ZnO nanoparticle decorated all-inorganic CsPbBr₃ quantum dot photodetectors

Flexible and Self‐Powered Photodetector Arrays Based on All‐Inorganic CsPbBr₃ Quantum Dots