Hybrid Si Nanowire/Amorphous Silicon FETs for Large-Area Image Sensor Arrays

Wong, William S.; Raychaudhuri, Sourobh; Lujan, R.; Sambandan, Sanjiv; Street, R. A.

doi:10.1021/nl200114h

Cited by 47 publications

(38 citation statements)

References 19 publications

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“…They are promising building blocks for future high-performance and high-integration nanodevices for electronics, optoelectronics, sensors, and energy science45. The capability of assembling NWs rationally in an orientation-, dimensionality-, and location-controlled manner is vital in tuning their properties toward high-integration nanodevices67. Aligned growth of inorganic NW arrays is usually achieved on lattice matched substrates via a vapor-liquid-solid (VLS) process with metallic catalysts involved89.…”

mentioning

confidence: 99%

In-situ device integration of large-area patterned organic nanowire arrays for high-performance optical sensors

Zhang

Pan

et al. 2013

Sci Rep

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Single-crystalline organic nanowires (NWs) are important building blocks for future low-cost and efficient nano-optoelectronic devices due to their extraordinary properties. However, it remains a critical challenge to achieve large-scale organic NW array assembly and device integration. Herein, we demonstrate a feasible one-step method for large-area patterned growth of cross-aligned single-crystalline organic NW arrays and their in-situ device integration for optical image sensors. The integrated image sensor circuitry contained a 10 × 10 pixel array in an area of 1.3 × 1.3 mm2, showing high spatial resolution, excellent stability and reproducibility. More importantly, 100% of the pixels successfully operated at a high response speed and relatively small pixel-to-pixel variation. The high yield and high spatial resolution of the operational pixels, along with the high integration level of the device, clearly demonstrate the great potential of the one-step organic NW array growth and device construction approach for large-scale optoelectronic device integration.

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confidence: 99%

In-situ device integration of large-area patterned organic nanowire arrays for high-performance optical sensors

Zhang

Pan

et al. 2013

Sci Rep

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“…Si nanowires were prepared using either Au nanocrystal seeds or with Sn seeds generated in situ in the reactor from 4 or Sn 2 H 6 ), etching away the Sn seed particles during nanowire growth. Under these conditions, Si also deposits heterogeneously on the surface of the nanowires as an amorphous shell.…”

Section: Silicon Nanowire Synthesismentioning

confidence: 99%

“…Rathi et al 24 found that in their plasma enhanced CVD VLS growth of Si nanowires with Sn seeds, the H 2 plasma reacted with Sn to form volatile tin hydrides (e.g. SnH 4 or Sn 2 H 6 ) and the loss of Sn would ultimately arrest wire growth. Similarly, it is likely that hydrogen evolved from trisilane decomposition reacts with the Sn during the SFLS growth process.…”

Section: Papermentioning

confidence: 99%

Precision synthesis of silicon nanowires with crystalline core and amorphous shell

Bogart

Korgel

2013

Dalton Trans.

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A synthetic route to crystalline silicon (Si) nanowires with an amorphous Si shell is reported. Trisilane (Si 3 H 8 ) and Sn(HMDS) 2 are decomposed in supercritical toluene at 450°C. Sn(HMDS) 2 creates Sn nanoparticles that seed Si nanowire growth by the supercritical fluid-liquid-solid (SFLS) mechanism. The Si : Sn ratio in the reaction determines the growth of amorphous Si shell. No amorphous shell forms at relatively low Si : Sn ratios of 20 : 1, whereas higher Si : Sn ratio of 40 : 1 leads to significant amorphous shell. We propose that hydrogen evolved from trisilane decomposition etches away the Sn seed particles as nanowires grow, which promotes the amorphous Si shell deposition when the higher Si : Sn ratios are used.

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“…Photosensors of nanometer scale benefits from optical (Mie) resonances, high conversion efficiency, and significant material conservation when compared with bulk devices. However, many of these nanoscale devices [3][4][5][6][7][8] (e.g., photovoltaics, photodetectors) have the problem of insufficient absorption amount due to the limit on the material absorption capacity and the small volume of individual nanowires. Therefore, 1D photosensors require more efficient absorber platforms in order to effectuate working of the advanced nanodevices.…”

Section: Introductionmentioning

confidence: 99%

Nanosprings harvest light more efficiently

Khudiyev

Bayındır

2015

Appl. Opt.

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Nanotechnology presents versatile architectural designs for the purpose of utilization as a building block of 1D optoelectronic nanodevices because current nanowire-based schemes require more effective solutions for low absorption capacity of nanoscale volumes. We report on the potential of nanospring absorbers as an alternative light-harvesting platform with significant advantages over conventional nanowires. Absorption capacity of nanospring geometry is found to be superior to cylindrical nanowire shape. Unlike nanowires, they are able to trap a larger amount of light thanks to characteristic periodic behavior that boosts light collection for the points matched with Mie resonances. Moreover, nanospring shape supplies compactness to a resulting device with area preservation as high as twofold. By considering that a nanospring array with optimal periods yields higher absorption than individual arrangements and core-shell designs, which further promote light collection due to unique antireflection features of shell layer, these nanostructures will pave the way for the development of highly efficient self-powered nanosystems.

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Hybrid Si Nanowire/Amorphous Silicon FETs for Large-Area Image Sensor Arrays

Cited by 47 publications

References 19 publications

In-situ device integration of large-area patterned organic nanowire arrays for high-performance optical sensors

In-situ device integration of large-area patterned organic nanowire arrays for high-performance optical sensors

Precision synthesis of silicon nanowires with crystalline core and amorphous shell

Nanosprings harvest light more efficiently

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