Single‐Crystalline CdS Nanobelts for Excellent Field‐Emitters and Ultrahigh Quantum‐Efficiency Photodetectors

Li, Liang; Wu, Pingfan; Fang, Xiao Sheng; Zhai, Tianyou; Dai, Li‐Xin; Liao, Meiyong; Koide, Yasuo; Wang, Shaoyi; Bando, Yoshio; Golberg, Dmitri

doi:10.1002/adma.201000144

Cited by 356 publications

(272 citation statements)

References 44 publications

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“…And, the faster response speed of this CsPb 2 Br 5 thin microsheets based photodetector could be ascribed to the high crystal quality of asprepared CsPb 2 Br 5 microsheets, which guaranteeing the efficient optical absorption and photogeneration of carriers. On the other side, the short transit time and large surface-to-volume ratio of CsPb 2 Br 5 thin microsheets tend to induce defects and dangling bonds on the surface of microsheets [40,41]. The switching in the two states exhibited faster photoresponse characteristics, allowing the device to act as a high-quality photosensitive switch.…”

Section: Resultsmentioning

confidence: 99%

All-Inorganic Perovskite CsPb2Br5 Microsheets for Photodetector Application

Tang

Han

et al. 2018

Front. Phys.

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Lead-halide perovskites have emerged as one kind of important optoelectronic materials with excellent performance in photovoltaic and light-emitting diode applications. Herein, we reported all-inorganic perovskite CsPb 2 Br 5 microsheets prepared by a facile injection method. Through the X-ray diffraction (XRD) and Scanning Electron Microscope (SEM), it could be seen that the CsPb 2 Br 5 microsheets showed single tetragonal crystalline phase and kept uniform square shape. Moreover, the as-synthesized CsPb 2 Br 5 microsheets exhibited photoluminescence emission at 513 nm, and the UV-vis absorption spectrum further indicated the band gap of CsPb 2 Br 5 microsheets was ≈2.50 eV. Additionally, the as-fabricated CsPb 2 Br 5 microsheets based photodetector exhibited faster photoresponse characteristics of short rise time (0.71 s) and decay time (0.60 s), which demonstrated its promising application as high performance electronic and optoelectronic devices.

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Section: Resultsmentioning

confidence: 99%

All-Inorganic Perovskite CsPb2Br5 Microsheets for Photodetector Application

Tang

Han

et al. 2018

Front. Phys.

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“…Notably, a turn‐on current density (10 μA cm −2 ) at a macroscopic field of as low as 3.60 V μm −1 and a high FE current density of 7.47 mA cm −2 at a macroscopic field of 5.80 V μm −1 can be read from Figure 3b. The results indicate that the UBNSs are ideal field emitters of high efficiency, which can surpass or comparable with B nanowires,[[qv: 12e]] LaB 6 /NdB 6 nanorods,25 B 4 C nanowires,26 CdS nanobelts,27 MoS 2 sheets,28 and graphene 29…”

Section: Resultsmentioning

confidence: 99%

Ultrathin Single‐Crystalline Boron Nanosheets for Enhanced Electro‐Optical Performances

et al. 2015

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Large‐scale single‐crystalline ultrathin boron nanosheets (UBNSs, ≈10 nm) are fabricated through an effective vapor–solid process via thermal decomposition of diborane. The UBNSs have obvious advantages over thicker boron nanomaterials in many aspects. Specifically, the UBNSs demonstrate excellent field emission performances with a low turn‐on field, E to, of 3.60 V μm−1 and a good stability. Further, the dependence of (turn‐on field) E to/(threshold field) E thr and effective work function, Φ e, on temperature is investigated and the possible mechanism of temperature‐dependent field emission phenomenon has been discussed. Moreover, electronic transport in a single UBNS reveals it to be an intrinsic p‐type semiconductor behavior with carrier mobility about 1.26 × 10−1 cm2 V−1 s−1, which is the best data in reported works. Interestingly, a multiconductive mechanism coexisting phenomenon has been explored based on the study of temperature‐dependent conductivity behavior of the UBNSs. Besides, the photodetector device fabricated from single‐crystalline UBNS demonstrates good sensitivity, reliable stability, and fast response, obviously superior to other reported boron nanomaterials. Such superior electronic‐optical performances are originated from the high quality of single crystal and large specific surface area of the UBNSs, suggesting the potential applications of the UBNSs in field‐emitters, interconnects, integrated circuits, and optoelectronic devices.

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“…Among them, cadmium sulphide (CdS) is an excellent material with a direct band gap of 2.42 eV, which is now widely used for optoelectronic conversion devices, biolabelling and other bio-application [4][5][6]. However, cadmium-based nanocrystals are more likely to decompose partially and release highly toxic Cd 2þ ions, which are fatal to cells [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of protein-coated CdS nanocrystals via microwave-assisted hydrothermal method

Xing

Guo

Miao

et al. 2012

Journal of Experimental Nanoscience

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CdS nanocrystals coated with protein were synthesised in the aqueous solution of bovine serum albumin protein by a rapid microwave-assisted hydrothermal method. Transmission electron microscopy, X-ray powder diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis (TGA) and cell cytotoxicity were used to characterise the morphology, composition and properties of the nanocrystals. The results indicate that the as-prepared CdS nanocrystals were wrapped up with the protein. The cytotoxicity profile on the human cervical cancer cell line HeLa shows that the potential cellular toxicity of the nanocrystals is efficiently prevented due to the presence of protein coating, which may offer the possibility of applications in biomedical research.

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Single‐Crystalline CdS Nanobelts for Excellent Field‐Emitters and Ultrahigh Quantum‐Efficiency Photodetectors

Cited by 356 publications

References 44 publications

All-Inorganic Perovskite CsPb2Br5 Microsheets for Photodetector Application

All-Inorganic Perovskite CsPb2Br5 Microsheets for Photodetector Application

Ultrathin Single‐Crystalline Boron Nanosheets for Enhanced Electro‐Optical Performances

Fabrication of protein-coated CdS nanocrystals via microwave-assisted hydrothermal method

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