Progress in piezo-phototronic effect enhanced photodetectors

Han, Xun; Chen, Mengxiao; Pan, Caofeng; Wang, Zhong Lin

doi:10.1039/c6tc04029b

Cited by 49 publications

(20 citation statements)

References 137 publications

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“…The built‐in electric field created by the Schottky contact can separate the photogenerated electrons and holes, which gives rise to a photocurrent. According to the thermionic field emission theory, under irradiation of a certain power, the photocurrent is determined by the SBH, which can be tuned by the piezoelectric polarization . One of the earliest related works was reported by Zhang et al They transferred a single ZnO microwire onto a flexible polystyrene (PS) substrate, and one end of the microwire was contacted with an Au electrode to create a Schottky junction ( Figure a) .…”

Section: Piezo‐phototronic Effect Enhanced Performances Of Self‐powermentioning

confidence: 99%

Self‐Powered Nanoscale Photodetectors

Tian

Wang

Chen

et al. 2017

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Novel self‐powered nanoscale photodetectors that can work without an external power source, which have great application potential in next‐generation nanodevices that operate wirelessly and independently, are being widely studied. This review aims to give a comprehensive summary of the state‐of‐the‐art research results on self‐powered nanoscale photodetectors. An introduction of recent progress on Schottky junction photodetectors is provided. Two types of Schottky junctions are discussed in detail: metal–semiconductor and semiconductor–graphene junctions. Next, recent developments of p–n junction photodetectors are highlighted, including homojunction and heterojunction photodetectors. Then, piezo‐phototronic effect enhanced photodetection performances of Schottky junctions and p–n junctions are discussed. Then, significant results on the photoelectrochemical‐cell‐based photodetector and integrated self‐powered nanosystem are presented, followed by a systematic comparison of different types of photodetectors. Finally, a summary of the previous results is given, and the major challenges that need to be addressed in the future are outlined. The hope is that this review can provide valuable insights into the current status of self‐powered photodetectors and spur new structure and device designs to further enhance photodetection performance.

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Section: Piezo‐phototronic Effect Enhanced Performances Of Self‐powermentioning

confidence: 99%

Self‐Powered Nanoscale Photodetectors

Tian

Wang

Chen

et al. 2017

Small

248

179

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“…As to photodetectors containing p–n junction, light absorbed in the depletion region creates electron–hole pairs, which are swept from the junction by the built‐in electric field. Similar to modifying the height of the Schottky barrier by the piezopotential, the width of the depletion region can also be modulated by external strain . Under a compressive strain, negative electric charges will aggregate at the interface of the n‐type semiconductor side.…”

Section: Strategies Of Ferroelectric and Piezoelectric Control/couplingmentioning

confidence: 99%

“…The driving force in a photodetector to separate photogenerated electron−hole pairs depends on the characteristics of the p−n junction or Schottky junction . The Schottky barrier height determines the sensitivity of the photodetectors containing Schottky junctions.…”

Section: Recent Progress and Applicationsmentioning

confidence: 99%

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Ferroelectric and Piezoelectric Effects on the Optical Process in Advanced Materials and Devices

et al. 2018

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Piezoelectric and ferroelectric materials have shown great potential for control of the optical process in emerging materials. There are three ways for them to impact on the optical process in various materials. They can act as external perturbations, such as ferroelectric gating and piezoelectric strain, to tune the optical properties of the materials and devices. Second, ferroelectricity and piezoelectricity as innate attributes may exist in some optoelectronic materials, which can couple with other functional features (e.g., semiconductor transport, photoexcitation, and photovoltaics) in the materials giving rise to unprecedented device characteristics. The last way is artificially introducing optical functionalities into ferroelectric and piezoelectric materials and devices, which provides an opportunity for investigating the intriguing interplay between the parameters (e.g., electric field, temperature, and strain) and the introduced optical properties. Here, the tuning strategies, fundamental mechanisms, and recent progress in ferroelectric and piezoelectric effects modulating the optical properties of a wide spectrum of materials, including lanthanide-doped phosphors, quantum dots, 2D materials, wurtzite-type semiconductors, and hybrid perovskites, are presented. Finally, the future outlook and challenges of this exciting field are suggested.

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“…Such an e‐skin promises that smart robots can accurately grasp and manipulate objects, distinguish surface rigidity and textures in the future . To accurately mimic tactile sensing functions, various types of sensing based on different signal transduction modes have been explored and applied . Due to the simple device layout and low cost, piezoresistive sensors which convert mechanical deformation into electrical resistance change are commonly used as sensing component …”

Section: Introductionmentioning

confidence: 99%

A Facile Realization Scheme for Tactile Sensing with a Structured Silver Nanowire‐PDMS Composite

Han

Jiang

et al. 2018

Adv Materials Technologies

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To mimic the sensing function of human skin, the rational design of force‐sensitive materials is highly required for sensors. Here, a facile design of resistive‐type tactile sensors based on a structured silver nanowire‐polydimethylsiloxane composite is reported for applications in electronic skins and wearable electronics. The composite has a hollow microstructure of interconnected channels, and the inner surface of the channels is a conductive layer consisting of silver nanowires. The sensing function to external force is realized by measuring the resistance change upon deforming. The deforming causes the distance change of silver nanowires and the contact‐area change of the inner surfaces. Such a unique structure promises a robust mechanical property due to the half‐embedded silver nanowires which are free of peeling off, and also makes it possible to control the device sensitivity by its mechanical structure and the elastic property of the polydimethylsiloxane. The results show that the composite has steady‐state responses to various pressures and stretches, even to mouth blowing, a response time of ≈90 ms, and favorable repeatability over 2000 cycles of bending/unbending. The 3D structure enables pressing, bending, pulling and torsional force sensing, and promises real‐time monitoring of various human motions ranging from blood pulses to joint movements.

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Progress in piezo-phototronic effect enhanced photodetectors

Cited by 49 publications

References 137 publications

Self‐Powered Nanoscale Photodetectors

Self‐Powered Nanoscale Photodetectors

Ferroelectric and Piezoelectric Effects on the Optical Process in Advanced Materials and Devices

A Facile Realization Scheme for Tactile Sensing with a Structured Silver Nanowire‐PDMS Composite

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