Fabrication of ordered Au nanodot arrays utilizing anodic aluminum oxide templates formed on Si substrate

Kwon, Na Young; Kim, Nam-Kyu; Yeon, J. K.; Yeom, Geun‐Young; Chung, Ilsub

doi:10.1116/1.3592431

Cited by 12 publications

(13 citation statements)

References 26 publications

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“…The difference in the AAO height at the same pore diameter results in the shadow effect, which originates from the aspect ratio between the pore diameter and the pore height. 10 Thus, it was possible to control the size of Cr nanodots in terms of the aspect ratio of the AAO template. That is, the size of the Cr nanodots decreases with increasing aspect ratio of the AAO template.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…In addition, a well-known two-step anodizing process was performed on the Al films deposited on the Si substrate. 10 the desired unoxidized Al film thickness. After the first anodization, a partially formed anodic aluminum oxide was removed by immersing it in a mixture of 1.8 wt% H 2 CrO 4 and 7.4 wt% H 3 PO 4 at 75 C for 90 min.…”

Section: Introductionmentioning

confidence: 99%

“…[10][11][12] Especially, AAO templates provide good opportunities to fabricate high-density arrays of sizecontrolled nanodots on a Si substrate by depositing the materials on a through-hole membrane. 10 In this study, we fabricated Cr nanodot Schottky diodes by depositing Cr through AAO templates. The diameters of * Author to whom correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

“…[10][11][12][13][14] Among these materials, anodic aluminum oxide (AAO) template has great advantages due to the low cost and easy process. [10][11][12] Especially, AAO templates provide good opportunities to fabricate high-density arrays of sizecontrolled nanodots on a Si substrate by depositing the materials on a through-hole membrane. 10 In this study, we fabricated Cr nanodot Schottky diodes by depositing Cr through AAO templates.…”

Section: Introductionmentioning

confidence: 99%

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Cr–Si Schottky Nano-Diodes Utilizing Anodic Aluminum Oxide Templates

Kwon¹,

Kim²,

Heo³

et al. 2014

j nanosci nanotechnol

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We have fabricated Cr nanodot Schottky diodes utilizing AAO templates formed on n-Si substrates. The diameters of the diodes were 75.0, 57.6, and 35.8 nm. Cr nanodot Schottky diodes with smaller diameters yield higher current densities than those with larger diameters due to an enhanced tunnel current contribution, which is attributed to a reduction in the barrier thickness. The diameters of Cr nanodots smaller than the Debye length (156 nm) play an important role in the reduction of barrier thickness. Also, we have fabricated Cr-Si nanorod Schottky diodes with three different lengths (130, 220, and 330 nm) by dry etching of n-Si substrate. Cr-Si nanorod Schottky diodes with longer nanorods yield higher reverse current than those with shorter nanorods due to the enhanced electric field, which is attributed to a high aspect ratio of Si nanorod.

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Section: Experimental Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Cr–Si Schottky Nano-Diodes Utilizing Anodic Aluminum Oxide Templates

Kwon¹,

Kim²,

Heo³

et al. 2014

j nanosci nanotechnol

Self Cite

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“…Among the advantages of utilization of such AAO templates are simplicity, possibility to use cheap equipment, tunability in preparation of nanostructures with different size and interparticle distance, and the possibility to work with different materials. 95,96 The AAO membrane method allows better control of NW parameters than other protocols for synthesis of similar nanostructures. Because AAO is also highly suitable for manufacturing of nanostructure arrays that provide high surface to volume ratio and good access for biomolecules due to vertical alignment, 97-100 we will consider this method in more detail.…”

Section: Anodic Porous Alumina Membranesmentioning

confidence: 99%

Chapter 13. Nanostructured Materials for Biosensor Applications: Comparative Review of Preparation Methods

Chegel¹

2012

Nanoscience &Amp; Nanotechnology Series

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Parallelized Nanopillar Perovskites for Semitransparent Solar Cells Using an Anodized Aluminum Oxide Scaffold

Kwon

Kim

Lee

et al. 2016

Advanced Energy Materials

107

112

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fi ber-shaped, [ 8 ] wearable, [ 9 ] and even semitransparent [ 10,11 ] perovskite solar cells.In particular, semitransparent solar cells are of great interest for future applications, such as power-generating window panels in buildings or automobiles, which would raise the usage ratio of solar energy without occupying additional space. [ 12,13 ] For example, building-integrated solar cells could lead to the creation of completely self-sustaining, pollution-free buildings. Furthermore, semitransparent solar cells can be stacked in a tandem device architecture in which a cell with a higher bandgap is placed atop another with a lower bandgap. [14][15][16] To date, most demonstrated semitransparent solar cells have been based on high-bandgap absorbers, thin polymers, and amorphous silicon absorbers, which result in critical losses in overall effi ciency. Perovskitebased absorbers possess outstanding lightabsorbing characteristics, and the explicit tradeoff between PCE and transparency can be adjusted by varying the thickness of the absorbing layer. In this strategy, the conventional approach is to form perovskite layers thin enough to attain the desirable high transparency. [17][18][19][20][21][22][23] Uniform, thin perovskite fi lms have been produced via evaporation or gasassisted spin-coating techniques. Roldán-Carmona et al. fabricated semitransparent perovskite solar cells by employing an evaporated 280 nm thick perovskite absorber layer, achieving a PCE of 7.73% and an average visible transmittance (AVT) of 19%. [ 10 ] Additionally, centimeter-scale, 135 nm thick evaporated CH 3 NH 3 PbI 3 thin fi lms were reported to have PCEs of 9.9%. [ 18 ] Using a gas-assisted spin-coating process, continuous 107 nm thick CH 3 NH 3 PbI 3 thin fi lms were demonstrated with PCEs of 8.1% and AVTs of 19%. [ 24 ] Along with the development of thin perovskite absorber layers, strategies for enhancing the carrier collection effi ciency, including the use of Ag nanowire electrodes, [ 20 ] graphene electrodes, [ 17 ] and atomically thin ZnO cathode buffer layers and Al 2 O 3 capping layers, [ 21 ] have been suggested to compensate for the limited light absorption.Despite the success of these approaches, the practical fabrication of large-scale continuous, thin perovskite fi lms remains challenging, and issues preventing commercial viability, including reproducibility and stability, are unresolved. Obtaining a highly effi cient, moderately thick absorber layer with a restricted open aperture is a prerequisite for achieving practical semitransparent photovoltaic devices. Two suggested Semitransparent solar cells have attracted signifi cant attention for practical applications, such as windows in buildings and automobiles. Here, semitransparent, highly effi cient, 1D nanostructured perovskite solar cells are demonstrated employing anodized aluminum oxide (AAO) as a scaffold layer. The parallel nanopillars in the perovskite layer enable construction of hazefree semitransparent devices without any hysteresis behavior. By controlling the...

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Fabrication of ordered Au nanodot arrays utilizing anodic aluminum oxide templates formed on Si substrate

Cited by 12 publications

References 26 publications

Cr–Si Schottky Nano-Diodes Utilizing Anodic Aluminum Oxide Templates

Cr–Si Schottky Nano-Diodes Utilizing Anodic Aluminum Oxide Templates

Chapter 13. Nanostructured Materials for Biosensor Applications: Comparative Review of Preparation Methods

Parallelized Nanopillar Perovskites for Semitransparent Solar Cells Using an Anodized Aluminum Oxide Scaffold

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