Electrical and optical properties of single zigzag SnO2 nanobelts

Butt, Faheem K.; Cao, Chuanbao; Khan, Waheed S.; Safdar, Muhammad; Fu, Xuewen; Tahir, Muhammad; Idrees, Faryal; Ali, Zulfiqar; Nabi, Ghulam; Yu, Dapeng

doi:10.1039/c2ce26728d

Cited by 31 publications

(13 citation statements)

References 73 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent years, considerable effort has been devoted to fabricating various SnO 2 nanostructures, including nanoparticles [15], nanowires [16], nanobelts [17], nanorods [18], hollow nanostructures [19], mesoporous solids [20], and porous nanostructures [21,22]. Among these structures, porous SnO 2 has drawn interest because of its high specific surface area, good stability, and low density, which promote gas diffusion and enhance material transportation processes, thus improving response time and sensitivity of the sensor [23,24].…”

Section: Introductionmentioning

confidence: 99%

Preparation of porous SnO2 microcubes and their enhanced gas-sensing property

Huang

Wang

et al. 2015

Sensors and Actuators B: Chemical

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Preparation of porous SnO2 microcubes and their enhanced gas-sensing property

Huang

Wang

et al. 2015

Sensors and Actuators B: Chemical

View full text Add to dashboard Cite

“…Nanobelts, presenting an intermediate structured between one and 2D materials (Figure c), have been intensively studied in the last few years, due to their advantage as a quasi‐ideal system to study dimensionally confined transport phenomena and building functional devices along individual nanobelts. [2a,22a,67] They were first reported by Wang and co‐workers in 2001 as a structurally controlled nanomaterial with well‐defined facets, unique growth directions, and a typical rectangular cross section. With large surface areas exposed to the light, various kinds of nanobelts have been assembled into nanoscale optical devices …”

Section: Nanostructured Photodetector Architecturesmentioning

confidence: 99%

Nanoarchitechtonics of Visible‐Blind Ultraviolet Photodetector Materials: Critical Features and Nano‐Microfabrication

Nasiri

Jin

Tricoli

2018

Advanced Optical Materials

View full text Add to dashboard Cite

Low-dimensional materials are usually classified into 0D, [19b,20] 1D, [2b,21] and 2D. [22] Quantum dots (QDs), [23] nanotubes, [24] nanowires, [25] nanorods, [18,26] nanobelts, [22a,27] core/ shell structures, [28] nanostructure arrays, [19a,29] epitaxial film, and heterostructures [30] are regarded as the future building blocks of visible-blind UV photodetectors. Compared to traditional thinfilm and bulk materials, low-dimensional nanostructured UV photodetectors are usually characterized by higher responsivity and photoconductivity gain, [1c,31] due to their high surface-areato-volume ratios and the nanoscale confined carrier transport kinetics. [3c,9,25b,32] The large surface-to-volume ratio significantly increases the number of surface trap states that can prolong the photocarrier lifetime by delaying the electron-hole recombination process. [1b,3c,9] In fact, the photoexcited carriers can be trapped by surface trap states and in that case their decay dynamics is dominated by the escape time from the traps. [33] The reduced dimensionality can confine the charge carrier transport path shortening the transit time and reducing recombination events. [3c] Nanostructured wide bandgap UV photodetectors have been produced by several methods, such as magnetron sputtering, [34] pulsed laser deposition, [35] chemical vapor deposition, [36] flame spray pyrolysis, [2d,9,15] and sol-gel. [37] A critical aspect remains how to accurately control the composition and hierarchical arrangement from the atomic scale of surface and bulk defects to the microscale of the active device area. The latter has been shown to be a dominant feature resulting in significant variation in the UV light response of quasi-identical nanomaterials. [9,25b,38] For instance, ZnO nanowires are usually reported to achieve orders of magnitude higher responsivity and detectivity than nanothin ZnO films. Similarly, ultraporous nanoparticle networks have shown thousand folds higher photo to dark-current ratios than more densely arranged ZnO nanoparticle layers resulting in among the highest detectivity reported for such 0D materials. [3c,9,39] Here, we present a comprehensive review of the latest achievements and research directions on the multiscale engineering of wide bandgap semiconductor materials for photodetection of UV light. We will focus on the impact of the nano-to microscale material hierarchy discussing commonalities and discrepancies across materials and morphologies. We will conclude with a review of the rapidly emerging trends and promising strategies for overcoming remaining issues for the engineering of the next generation of miniaturized wide bandgap semiconductors UV photodetectors for wearable and easily deployable devices. Photodetection MechanismWide bandgap semiconductors have been investigated in many recent studies to understand the fundamental process and enhancing the response to the UV light. [9,15,25b,40] The photoresponse characteristics of nanostructured devices are significantly influenced by a number of...

show abstract

“…Due to its remarkable optical/ photocatalytic [1] and electrical properties [2] it has attracted huge attention of researchers. These properties are largely dependent upon temperature, particle size, morphology [3] and method of synthesis [4].…”

Section: Introductionmentioning

confidence: 99%