Balanced Photodetection in One-Step Liquid-Phase-Synthesized CsPbBr<sub>3</sub> Micro-/Nanoflake Single Crystals

Zheng, Wei; Xiong, Xufan; Lin, Rijia; Zhang, Zhaojun; Xu, Cunhua; Huang, Feng

doi:10.1021/acsami.7b18093

Cited by 64 publications

(45 citation statements)

References 27 publications

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“…Once ITO NWs are incorporated into the device channel, the responsivity is greatly improved to 4.9 × 10 6 A W −1 . Notably, this responsivity is already 5 orders of magnitude higher than the ones of typical IPH photodetectors using photovoltaic structures, and 2 orders of magnitude higher than those of CsPbBr 3 ‐based photogating devices . At the same time, it is also critical to assess the response time of the devices.…”

Section: Resultsmentioning

confidence: 98%

“…With the improved material stability, most of the early works focused on the fabrication of IHP photodetectors utilizing the photovoltaic device structure. Owing to the poor conductivity of IHPS as well as the lack of appropriate photogain mechanism, the obtained IHP devices usually exhibit low responsivities ( R ) with the values of ≈10 −1 to 10 1 A W −1 , making the detection of weak optical signals difficult. To solve this problem, one alternative way is to employ the hybrid phototransistor structure by combining a high‐mobility conducting layer with a perovskite light absorption layer.…”

Section: Introductionmentioning

confidence: 99%

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Substantially Improving Device Performance of All‐Inorganic Perovskite‐Based Phototransistors via Indium Tin Oxide Nanowire Incorporation

Wang

Zou

Wan

et al. 2020

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In the past decade, organic-inorganic metal halide perovskites (OMHPs) have drawn tremendous attention because of their extraordinary optoelectronic properties, including high All-inorganic halide perovskites (IHPs) have attracted enormous attention due to their intrinsically high optical absorption coefficient and superior ambient stabilities. However, the photosensitivity of IHP-based photodetectors is still restricted by their poor conductivities. Here, a facile design of hybrid phototransistors based on the CsPbBr 3 thin film and indium tin oxide (ITO) nanowires (NWs) integrated into a InGaZnO channel in order to achieve both high photoresponsivity and fast response is reported. The metallic ITO NWs are employed as electron pumps and expressways to efficiently extract photocarriers from CsPbBr 3 and inject electrons into InGaZnO. The obtained device exhibits the outstanding responsivity of 4.9 × 10 6 A W −1 , which is about 100-fold better than the previous best results of CsPbBr 3 -based photodetectors, together with the fast response (0.45/0.55 s), long-term stability (200 h in ambient), and excellent mechanical flexibility. By operating the phototransistor in the depletion regime, an ultrahigh specific detectivity up to 7.6 × 10 13 Jones is achieved. More importantly, the optimized spin-coating manufacturing process is highly beneficial for achieving uniform InGaZnO-ITO/perovskite hybrid films for high-performance flexible detector arrays. All these results can not only indicate the potential of these hybrid phototransistors but also provide a valuable insight into the design of hybrid material systems for high-performance photodetection.

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Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Substantially Improving Device Performance of All‐Inorganic Perovskite‐Based Phototransistors via Indium Tin Oxide Nanowire Incorporation

Wang

Zou

Wan

et al. 2020

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“…Figure 3 g displays the photo/dark current ratios of CH 3 NH 3 PbX 3 detectors under increasing voltage, the maximum photo/dark current ratios are nearly 900 for CH 3 NH 3 PbCl 3 , 320 for CH 3 NH 3 PbBr 3 and 190 for CH 3 NH 3 PbI 3 . The responsivity is defined as R = I / AP , where I represents the photocurrent, P is the incident light power, and A is the absorption area of device [34–37]. Illuminated under 255 nm light with power intensity of 5.3 mW cm −2 , the responsivity versus voltage is shown in figure 3 h .…”

Section: Resultsmentioning

confidence: 99%

High-sensitive and fast response to 255 nm deep-UV light of CH ₃ NH ₃ PbX ₃ (X = Cl, Br, I) bulk crystals

et al. 2018

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Deep-UV light detection has important application in surveillance and homeland security regions. CH3NH3PbX3 (X = Cl, Br, I) materials have outstanding optical absorption and electronic transport properties suitable for obtaining excellent deep-UV photoresponse. In this work, we have grown high-quality CH3NH3PbX3 (X = Cl, Br, I) bulk crystals and used them to fabricate photodetectors. We found that they all have high-sensitive and fast-speed response to 255 nm deep-UV light. Their responsivities are 10–103 times higher than MgZnO and Ga2O3 detectors, and their response speeds are 103 times faster than Ga2O3 and ZnO detectors. These results indicate a new promising route for deep-UV detection.

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Section: The Synthesis and Properties Of Low‐dimensional Mhpsmentioning

confidence: 99%

Low‐Dimensional Metal Halide Perovskite Photodetectors

et al. 2020

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Metal halide perovskites (MHPs) have been a hot research topic due to their facile synthesis, excellent optical and optoelectronic properties, and record‐breaking efficiency of corresponding optoelectronic devices. Nowadays, the development of miniaturized high‐performance photodetectors (PDs) has been fueling the demand for novel photoactive materials, among which low‐dimensional MHPs have attracted burgeoning research interest. In this report, the synthesis, properties, photodetection performance, and stability of low‐dimensional MHPs, including 0D, 1D, 2D layered and nonlayered nanostructures, as well as their heterostructures are reviewed. Recent advances in the synthesis approaches of low‐dimensional MHPs are summarized and the key concepts for understanding the optical and optoelectronic properties related to the PD applications of low‐dimensional MHPs are introduced. More importantly, recent progress in novel PDs based on low‐dimensional MHPs is presented, and strategies for improving the performance and stability of perovskite PDs are highlighted. By discussing recent advances, strategies, and existing challenges, this progress report provides perspectives on low‐dimensional MHP‐based PDs in the future.

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Balanced Photodetection in One-Step Liquid-Phase-Synthesized CsPbBr₃ Micro-/Nanoflake Single Crystals

Cited by 64 publications

References 27 publications

Substantially Improving Device Performance of All‐Inorganic Perovskite‐Based Phototransistors via Indium Tin Oxide Nanowire Incorporation

Substantially Improving Device Performance of All‐Inorganic Perovskite‐Based Phototransistors via Indium Tin Oxide Nanowire Incorporation

High-sensitive and fast response to 255 nm deep-UV light of CH ₃ NH ₃ PbX ₃ (X = Cl, Br, I) bulk crystals

Low‐Dimensional Metal Halide Perovskite Photodetectors

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Balanced Photodetection in One-Step Liquid-Phase-Synthesized CsPbBr3 Micro-/Nanoflake Single Crystals

Cited by 64 publications

References 27 publications

Substantially Improving Device Performance of All‐Inorganic Perovskite‐Based Phototransistors via Indium Tin Oxide Nanowire Incorporation

Substantially Improving Device Performance of All‐Inorganic Perovskite‐Based Phototransistors via Indium Tin Oxide Nanowire Incorporation

High-sensitive and fast response to 255 nm deep-UV light of CH 3 NH 3 PbX 3 (X = Cl, Br, I) bulk crystals

Low‐Dimensional Metal Halide Perovskite Photodetectors

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Product

Resources

About

Balanced Photodetection in One-Step Liquid-Phase-Synthesized CsPbBr₃ Micro-/Nanoflake Single Crystals

High-sensitive and fast response to 255 nm deep-UV light of CH ₃ NH ₃ PbX ₃ (X = Cl, Br, I) bulk crystals