Wafer-scale synthesis of monolayer WS2 for high-performance flexible photodetectors by enhanced chemical vapor deposition

Lan, Changyong; Zhou, Ziyao; Zhou, Zhifei; Li, Chun; Shu, Lei; Shen, Lifan; Li, Dapan; Dong, Ruoting; Yip, Sen Po; Ho, Johnny C.

doi:10.1007/s12274-017-1941-4

Cited by 202 publications

(160 citation statements)

References 68 publications

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“…At the light intensity of 8mWcm À2 and ab ias of 10 V, the R and detectivity of HFA photodetector were calculated as 0.95 mAW À1 (Figure 4d)a nd 3 10 11 Jones (Figure S6), respectively.C ompared to the results of photodetectorso fi norganic 2D materials, the responsivity of device is smaller than that of WS 2 ,A u-CIS/MoS or Pt-CIS/MoS. [41][42][43] However,d etectivity of HFA photodetector exhibits excellent result. (TableS5) It is expectedt od ecrease the electrode distance to improve the photoresponsivity.…”

Section: Resultsmentioning

confidence: 87%

(C₆H₁₃NH₃)₂(NH₂CHNH₂)Pb₂I₇: A Two‐dimensional Bilayer Inorganic–Organic Hybrid Perovskite Showing Photodetecting Behavior

Wang

Liu

et al. 2019

Chemistry An Asian Journal

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Inorganic–organic hybrid perovskites, especially two‐dimensional (2D) layered halide perovskites, have attracted significant attention due to their unique structures and attractive optoelectronic properties, which open up a great opportunity for next‐generation photosensitive devices. Herein, we report a new 2D bilayered inorganic–organic hybrid perovskite, (C6H13NH3)2(NH2CHNH2)Pb2I7 (HFA, where C6H13NH3+ is hexylaminium and NH2CHNH2+ is formamidinium), which exhibits a remarkable photoresponse under broadband light illumination. Structural characterizations demonstrate that the 2D perovskite structure of HFA is constructed by alternant stacking of inorganic lead iodide bilayered sheets and organic hexylaminium layers. Optical absorbance measurements combined with density functional theory (DFT) calculations suggest that HFA is a direct band gap semiconductor with a narrow band gap (Eg) of ≈2.02 eV. Based on these findings, photodetectors based on HFA crystal wafer are fabricated, which exhibit fascinating optoelectronic properties including large on/off current ratios (over 103), fast response speeds (τrise=310 μs and τdecay=520 μs) and high responsivity (≈0.95 mA W−1). This work will contribute to the design and development of new two‐dimensional bilayer inorganic–organic hybrid perovskites for high‐performance photosensitive devices.

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Section: Resultsmentioning

confidence: 87%

(C₆H₁₃NH₃)₂(NH₂CHNH₂)Pb₂I₇: A Two‐dimensional Bilayer Inorganic–Organic Hybrid Perovskite Showing Photodetecting Behavior

Wang

Liu

et al. 2019

Chemistry An Asian Journal

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“…Wearable environmental sensors, which mainly monitor environmental parameters, such as various environmental gases, breathing gases, and humidity, have received extensive attention. This information can not only protect people from adverse environments, enhancing awareness of the impact of the environment on health care, but also the interaction between people and the environment, improving human–computer interactions.…”

Section: Promising Applications Of Smart Wearable Sensors In Health Mmentioning

confidence: 99%

Bio‐Multifunctional Smart Wearable Sensors for Medical Devices

Wang

Lou

Jiang

et al. 2019

Advanced Intelligent Systems

133

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Advances in digital health care have driven innovations in high‐performance wearable and smart sensors. One requirement in this field is establishing healthy, secure, and reliable medical devices for precisely monitoring vital signs of the human body or the surrounding environment through flexible sensors with not only high‐sensing performance but also excellent biofunctionality. Smart wearable sensors with excellent biofunctionality furnish medical devices with various smart functions such as biocompatibility, biodegradability, and self‐healing, which have attracted widespread interest from device engineers and materials scientists. Herein, a comprehensive review of the latest progress concerning these smart wearable sensors is presented with a focus on bio‐multifunctional (biocompatible, biodegradable, and self‐healing) device designs. The medical applications of bio‐multifunctional smart wearable sensors are also briefly covered, and to conclude, a discussion of the challenges, opportunities, and future perspectives is provided.

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“…In comparison, solid sources are also commonly used for the growth of TMDs. In the CVD process, transition metal oxides (eg, MoO 3 , WO 3 ) or chlorides (MoCl 5 ) or metal foils/films serve as the metal (molybdenum or tungsten) sources while sulfur or selenium powders act as the source of sulfur or selenium. There are three different precursor supply modes (Figure C): point‐to‐face, horizontal, and face‐to‐face .…”

Section: Vapor‐phase Growth Of High‐quality Wafer‐scale 2d Materialsmentioning

confidence: 99%

Vapor‐phase growth of high‐quality wafer‐scale two‐dimensional materials

Tong

Liu

Zeng

et al. 2019

InfoMat

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Emerging two‐dimensional (2D) materials have stimulated tremendous scientific and industrial interests due to their diverse and tunable physical, chemical, and mechanical properties. The scalable production of high‐quality wafer‐scale 2D materials has become significantly essential to bring us closer to practical industrial applications, particularly in electronic devices. Vapor‐phase growth provides attractive opportunities for the synthesis of large‐area and high‐quality 2D materials. In this review, we will emphasize vapor‐phase growth strategies from three aspects, including suppressing nucleation, seamless stitching, and evolutionary selection growth. We discuss the general understanding of the related fundamental mechanism and specific parameter optimization from precursors and substrate design to the adjusting of growth parameters (temperature and pressure). Meanwhile, we present other strategies to produce various kinds of wafer‐scale 2D materials. Finally, we conclude the current challenges and future directions in this developing field. This work may inspire researchers to better design routes in the synthesis of wafer‐scale 2D materials with high quality.

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Wafer-scale synthesis of monolayer WS2 for high-performance flexible photodetectors by enhanced chemical vapor deposition

Cited by 202 publications

References 68 publications

(C₆H₁₃NH₃)₂(NH₂CHNH₂)Pb₂I₇: A Two‐dimensional Bilayer Inorganic–Organic Hybrid Perovskite Showing Photodetecting Behavior

(C₆H₁₃NH₃)₂(NH₂CHNH₂)Pb₂I₇: A Two‐dimensional Bilayer Inorganic–Organic Hybrid Perovskite Showing Photodetecting Behavior

Bio‐Multifunctional Smart Wearable Sensors for Medical Devices

Vapor‐phase growth of high‐quality wafer‐scale two‐dimensional materials

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Wafer-scale synthesis of monolayer WS2 for high-performance flexible photodetectors by enhanced chemical vapor deposition

Cited by 202 publications

References 68 publications

(C6H13NH3)2(NH2CHNH2)Pb2I7: A Two‐dimensional Bilayer Inorganic–Organic Hybrid Perovskite Showing Photodetecting Behavior

(C6H13NH3)2(NH2CHNH2)Pb2I7: A Two‐dimensional Bilayer Inorganic–Organic Hybrid Perovskite Showing Photodetecting Behavior

Bio‐Multifunctional Smart Wearable Sensors for Medical Devices

Vapor‐phase growth of high‐quality wafer‐scale two‐dimensional materials

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Product

Resources

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(C₆H₁₃NH₃)₂(NH₂CHNH₂)Pb₂I₇: A Two‐dimensional Bilayer Inorganic–Organic Hybrid Perovskite Showing Photodetecting Behavior

(C₆H₁₃NH₃)₂(NH₂CHNH₂)Pb₂I₇: A Two‐dimensional Bilayer Inorganic–Organic Hybrid Perovskite Showing Photodetecting Behavior