p-GaN/n-ZnO nanorods: the use of graphene nanosheets composites to increase charge separation in self-powered visible-blind UV photodetectors

Huang, Chun‐Ying; Kang, Chun-Chieh; Ma, Yu-Chi; Chou, Yu-Cheng; Ye, Jian-Huei; Huang, Ruting; Siao, Chen-Zih; Lin, Yu‐Feng; Chang, Yu-Hao; Shen, Ji‐Lin; Lin, Tai‐Yuan

doi:10.1088/1361-6528/aadad8

Cited by 32 publications

(17 citation statements)

References 58 publications

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“…Ultraviolet (UV) photodetectors (PDs) are widely used for biological analysis, flame monitoring, environmental sensing, and space exploration. − To reduce or eliminate energy consumption, many studies propose self-powered UV PDs that convert incident UV light into an electrical signal, so there is no need for an external power supply. , UV PDs that operate at zero bias usually have a p–n heterojunction structure because the built-in electrical field prevents the recombination of photogenerated electron–hole pairs. − However, the vertical structure of a p–n photodiode that has two different electrodes on opposite sides is complex, and the large lattice mismatch at the interfaces in the heterostructure result in a significant reduction in the performance of the device. ,, …”

Section: Introductionmentioning

confidence: 99%

Realization of a Self-Powered InGaZnO MSM UV Photodetector Using Localized Surface Fluorine Plasma Treatment

Huang

Peng

Hsieh

2020

ACS Appl. Electron. Mater.

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Metal−semiconductor−metal (MSM) photodetectors (PDs) are used for optoelectronic integrated circuits (OEICs) because they allow easy integration with a preexisting circuit. However, traditional MSM PDs require an external bias to separate the electron−hole pairs because they have a symmetrical structure. This study proposes a method to create an asymmetric Schottky barrier height in a MSM PD with a symmetrical interdigital electrode. A localized surface fluorine plasma treatment is applied to a specific area of the a-IGZO film underneath the contacts of the MSM PDs, which produces a localized oxygen deficiency. The photocurrent spontaneously diffuses because there is an asymmetric Schottky barrier. This gives the device self-powering characteristics. The a-IGZO MSM PD with a symmetrical interdigitate electrode operates at a zero bias and has a responsivity of 5 mA/W. The open-circuit voltage under illumination at 365 nm (2 mW/cm 2 ) is 0.20 V. This study demonstrates that this method is applicable to other MSM PDs, particularly those that use an amorphous oxide semiconductor as the active layer.

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Section: Introductionmentioning

confidence: 99%

Realization of a Self-Powered InGaZnO MSM UV Photodetector Using Localized Surface Fluorine Plasma Treatment

Huang

Peng

Hsieh

2020

ACS Appl. Electron. Mater.

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“…Guo et al [37], fabricated a photodetector based on zinc oxide quantum dots and CDs, which achieved a detectivity and noise equivalent power of 3.1 × 10 17 cmHz 1/2 /W and 7.8 × 10 −20 W, respectively. Moreover, in photosensing applications, it has been demonstrated that the photoresponsivity of p-n junction based photodetectors can be increased by the use of graphene nanosheets composites [38,39]. Dai et al [40], demonstrated transparent and flexible (TFT) based on solution processed-graphene nanosheets and amorphous indium-gallium-zinc-oxide (a-IGZO) composites, with an achieved mobility of 23.8 (cm 2 V −1 s −1 ), which is about thirty times higher than that of the pristine a-IGZO TFTs (0.82 cm 2 V −1 s −1 ).…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photoresponsivity of All-Inorganic (CsPbBr3) Perovskite Nanosheets Photodetector with Carbon Nanodots (CDs)

et al. 2019

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A hybrid composite photodetector based on cesium lead bromine perovskite (CsPbBr3) nanosheets and carbon nanodots (CDs) was fabricated on a quartz substrate by a one-step method of spin-coating and hot-plate annealing. The responsivity of the CsPbBr3/CD hybrid composite photodetector was 608 mAW−1 (under a 520-nm laser diode source applied at 0.2 mWcm−2), almost three times higher than that of a CsPbBr3-based photodetector (221 mAW−1). The enhanced performance of the CsPbBr3/CD photodetector is attributable to the high band alignment of the CDs and CsPbBr3, which significantly improves the charge extraction at the CsPbBr3/CD interface. Moreover, the hybrid CsPbBr3/CD photodetector exhibited a fast response time with a rise and decay time of 1.55 and 1.77 ms, which was faster than that of a pure CsPbBr3 based photodetector, indicating that the CDs accelerate the extraction of electrons and holes trapped in the CsPbBr3 film.

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“…In an earlier study, Zhu and co-workers reported a ZnO film/p-GaN heterojunction self-powered UV PD with a [12]. In order to enhance the response performance of the self-powered UV PDs, many different materials such as CdS, MgO, graphene, CsPbBr 3 , have been used to couple with ZnO/p-GaN heterojunction [13][14][15][16][17]. Copper oxide (CuO), as a typical transition-metal oxide semiconductor, has drawn extensive attention in the research fields of photoelectric detectors [18].…”

Section: Introductionmentioning

confidence: 99%

Enhanced photoresponse in ZnO nanorod array/p-GaN self-powered ultraviolet photodetectors via coupling with CuO nanostructures

Yao

Peng

et al. 2020

Mater. Res. Express

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ZnO nanorod arrays (ZnO NRAs) coupled with coral-like CuO nanostructures (CuO CLNs) were prepared by low-temperature hydrothermal method. Self-powered ultraviolet (UV) photodetectors (PDs) based on ZnO NRAs/CuO CLNs/p-GaN heterostructure were fabricated via a direct-contact method. Under UV illumination (1.46 mW cm −2 ), the ratios of photocurrent to dark current (I photo /I dark ), photo-responsivity and specific detectivity for the ZnO NRAs/CuO CLNs/p-GaN heterojunction self-powered PD were estimated to be 1143, 1.44 mA W −1 and 5.9×10 10 cm H z 1 /2 /W at 0 V, which were about ∼187, ∼104 and ∼153 times greater than those of the ZnO NRAs/ p-GaN self-powered PD, respectively. Moreover, the PD displayed faster response time, excellent stability and repeatability by coupling with CuO CLNs. The mechanism of the enhanced photoresponse performance was discussed through the energy band diagram.

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p-GaN/n-ZnO nanorods: the use of graphene nanosheets composites to increase charge separation in self-powered visible-blind UV photodetectors

Cited by 32 publications

References 58 publications

Realization of a Self-Powered InGaZnO MSM UV Photodetector Using Localized Surface Fluorine Plasma Treatment

Realization of a Self-Powered InGaZnO MSM UV Photodetector Using Localized Surface Fluorine Plasma Treatment

Enhanced Photoresponsivity of All-Inorganic (CsPbBr3) Perovskite Nanosheets Photodetector with Carbon Nanodots (CDs)

Enhanced photoresponse in ZnO nanorod array/p-GaN self-powered ultraviolet photodetectors via coupling with CuO nanostructures

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