Low-temperature processed inorganic perovskites for flexible detectors with a broadband photoresponse

Zhang, Ting; Wang, Feng; Zhang, Peng; Wang, Yafei; Chen, Hao; Li, Jian; Wu, Jiang; Chen, Li; Chen, Zhi David

doi:10.1039/c8nr09900f

Cited by 73 publications

(54 citation statements)

References 34 publications

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“…1e, the decorated CsPbBr 3 QDs can only enhance the absorption for a narrow range (400-500 nm) in comparison with CH 3 NH 3 PbI 3 −x Cl x layer solely. Furthermore, we also calculated the bandgap of QDs according to the Tauc equation [39][40][41][42][43][44] as shown in Additional file 1: Figure S1. The bandgap is about 2.38 eV.…”

Section: Resultsmentioning

confidence: 99%

All-Perovskite Photodetector with Fast Response

et al. 2019

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Perovskites have attracted substantial attention on account of their excellent physical properties and simple preparation process. Here we demonstrated an improved photodetector based on solution-processing organic-inorganic hybrid perovskite CH 3 NH 3 PbI 3− x Cl x layer decorated with CsPbBr 3 perovskite quantum dots. The CH 3 NH 3 PbI 3− x Cl x -CsPbBr 3 photodetector was operated in a visible light region, which appeared high responsivity ( R = 0.39 A/W), detectivity ( D* = 5.43 × 10 9 Jones), carrier mobility ( μ p = 172 cm 2 V −1 s −1 and μ n = 216 cm 2 V −1 s −1 ), and fast response (rise time 121 μs and fall time 107 μs). The CH 3 NH 3 PbI 3− x Cl x -CsPbBr 3 heterostructure is anticipated to find comprehensive applications in future high-performance photoelectronic devices. Electronic supplementary material The online version of this article (10.1186/s11671-019-3082-z) contains supplementary material, which is available to authorized users.

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Section: Resultsmentioning

confidence: 99%

All-Perovskite Photodetector with Fast Response

et al. 2019

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“…Generally, the optical features of the crystal are closely related to its photoelectric performance . The UV–vis absorption spectrum exhibits a subvertical absorption edge at 650 nm ( Figure a).…”

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confidence: 99%

Highly Oriented Thin Films of 2D Ruddlesden‐Popper Hybrid Perovskite toward Superfast Response Photodetectors

Han

Yao

Liu

et al. 2019

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2D hybrid perovskites have shown great promise in the photodetection field, due to their intriguing attributes stemming from unique structural architectures. However, the great majority of detectors based on this 2D system possess a relatively low response speed (≈ms), making it extremely urgent to develop new candidates for superfast photodetection. Here, a new organic–inorganic hybrid perovskite, (PA)2(FA)Pb2I7 (EFA, where PA is n‐pentylaminium and FA is formamidine), which features the 2D Ruddlesden–Popper type perovskite framework that is composed of the corner‐sharing PbI6 octahedra is reported. Significantly, photodetectors fabricated on highly oriented thin films, which exhibit a perfect orientation parallel to 2D inorganic perovskite layers, exhibit a superfast response time up to ≈2.54 ns. To the best of the knowledge, this figure‐of‐merit catches up with that of the top‐ranking commercial materials, and sets a new record for 2D hybrid perovskite photodetectors. Moreover, extremely high photodetectivity (≈1.73 × 1014 Jones, under an incident power intensity of ≈46 µW cm−2), considerable switching ratios (>103), and low dark current (≈10 pA) are also achieved in the detector, indicating its great potential for high‐efficiency photodetection. These results shed light on the possibilities to explore new 2D candidates for assembling future high‐performance optoelectronic devices.

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“…To date, various functional materials have been explored for constructing flexible photodetectors, such as zero‐dimensional (0D) semiconductor nanostructures, 2D layered materials, and perovskites. [ 11–14 ] 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 demonstrated intriguing properties, including large absorption coefficients, tunable bandgaps, long carrier diffusion length, and high carrier mobility.…”

Section: Figurementioning

confidence: 99%

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

Shen

et al. 2020

Advanced Materials

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139

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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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Low-temperature processed inorganic perovskites for flexible detectors with a broadband photoresponse

Abstract: The flexible perovskite photodetector, fabricated by a modified one-step method, showed a broadband spectrum response from blind ultraviolet to visible light, and exhibited excellent mechanical flexibility and improved environmental stability.

Cited by 73 publications

References 34 publications

All-Perovskite Photodetector with Fast Response

All-Perovskite Photodetector with Fast Response

Highly Oriented Thin Films of 2D Ruddlesden‐Popper Hybrid Perovskite toward Superfast Response Photodetectors

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

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Low-temperature processed inorganic perovskites for flexible detectors with a broadband photoresponse

Abstract: The flexible perovskite photodetector, fabricated by a modified one-step method, showed a broadband spectrum response from blind ultraviolet to visible light, and exhibited excellent mechanical flexibility and improved environmental stability.

Cited by 73 publications

References 34 publications

All-Perovskite Photodetector with Fast Response

All-Perovskite Photodetector with Fast Response

Highly Oriented Thin Films of 2D Ruddlesden‐Popper Hybrid Perovskite toward Superfast Response Photodetectors

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

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