Synthesis and characterization of polycrystalline Sn and SnO2 films with wire morphologies

Santato, Clara; López, Carmen M.; Choi, Kyoung Shin

doi:10.1016/j.elecom.2007.02.006

Cited by 23 publications

(15 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Further studies to understand dye uptake, interfacial chemistry and electron injection processes will be crucial to improve the stability and current density of tin oxide nanowire based DSSCs. In addition to DSSCs, because of potentially better transport properties, SnO 2 nanowires are finding increased applications in photoelectrochemical cells, 23 and Li-ion batteries. 24…”

Section: Transport and Recombination Characteristicsmentioning

confidence: 99%

Surface properties of SnO2 nanowires for enhanced performance with dye-sensitized solar cells

Gubbala

Russell

Shah

et al. 2009

Energy Environ. Sci.

139

View full text Add to dashboard Cite

Our recent studies showed that nanowire based DSSCs exhibited over 250 mV higher open circuit potentials (V OC ) compared to those using nanoparticles. In this study, the electron transport and surface properties of nanowires and nanoparticles are investigated to understand the reasons for the observed higher photovoltages with NW based solar cells. It was seen that, in addition to slow recombination kinetics, the lower work function of SnO 2 nanowires compared to the nanoparticle counterparts also significantly contributes to the high V OC observed for the nanowire based DSSCs.

show abstract

Section: Transport and Recombination Characteristicsmentioning

confidence: 99%

Surface properties of SnO2 nanowires for enhanced performance with dye-sensitized solar cells

Gubbala

Russell

Shah

et al. 2009

Energy Environ. Sci.

139

View full text Add to dashboard Cite

show abstract

“…Most studies in this area have focused on electrochemical migration and analysis of passive tin films. [6][7][8][9][10][11] Some researchers have studied the corrosion behaviors of solder alloys with compositions of SnZn-X, Sn-In-Ag, and Sn-Zn-Ag-Al-XGa, but few have studied the corrosion properties of Sn-Ag-Cu. [12][13][14][15][16][17][18] In this research, deionized water was used as the corrosion solution, and the formation mechanism of tin(II) oxide crystals on the surfaces of Sn-Ag-Cu and Sn-Ag-Cu-Bi solder joints was studied and compared with that for the traditional eutectic Sn-Pb solder.…”

Section: Introductionmentioning

confidence: 99%

Generation of Tin(II) Oxide Crystals on Lead-Free Solder Joints in Deionized Water

Chang

Chen

et al. 2009

Journal of Elec Materi

View full text Add to dashboard Cite

The effect of the anode and cathode on the electrochemical corrosion behavior of lead-free Sn-Ag-Cu and Sn-Ag-Cu-Bi solder joints in deionized water was investigated. Corrosion studies indicate that SnO crystals were generated on the surfaces of all lead-free solder joints. The constituents of the lead-free solder alloys, such as Ag, Cu, and Bi, did not affect the corrosion reaction significantly. In contrast to lead-free solders, PbO x was formed on the surface of the traditional 63Sn-37Pb solder joint in deionized water. A cathode, such as Au or Cu, was necessary for the electrochemical corrosion reaction of solders to occur. The corrosion reaction rate decreased with reduction of the cathode area. The formation mechanism of SnO crystals was essentially a galvanic cell reaction. The anodic reaction of Sn in the lead-free solder joints occurred through solvation by water molecules to form hydrated cations. In the cathodic reaction, oxygen dissolved in the deionized water captures electrons and is deoxidized to hydroxyl at the Au or Cu cathode. By diffusion, the anodic reaction product Sn 2+ and the cathodic reaction product OH À meet to form Sn(OH) 2 , some of which can dehydrate to form more stable SnOAExH 2 O crystals on the surface of the solder joints. In addition, thermodynamic analysis confirms that the Sn corrosion reaction could occur spontaneously.

show abstract

“…The instantaneous electrolysis of the incorporated water generates hydrogen bubbles that result in the blockage of several sites ,, on the substrate. Additionally, the consumption of protons to produce hydrogen bubbles causes relatively alkaline conditions , localized at the electrode–electrolyte interface due to the relatively high concentration of OH – ions therein. Thus, the metal ions in the electrolyte diffusing toward the electrode surface are forced to selectively nucleate in a high pH environment in the form of their corresponding metal hydroxides [M 2+ + OH – → M(OH) 2 ↓] in the regions lacking bubble coverage, leading to dendritic branching.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Oxygen Evolution Reaction Electrocatalysis via Electrodeposited Amorphous α-Phase Nickel-Cobalt Hydroxide Nanodendrite Forests

Balram

Zhang

Santhanagopalan

2017

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

We demonstrate an electrodeposition method to rapidly grow novel three-dimensional nanodendrite forests of amorphous α-phase mixed nickel-cobalt hydroxides on stainless steel foil toward high performance electrocatalysis of the oxygen evolution reaction (OER). The proposed hydrogen bubble-templated, diffusion-limited deposition process leads to the unprecedented dendritic growth of vertically aligned amorphous metal hydroxides, induced by the controlled electrolysis of the tuned water content in the primarily alcohol-based deposition solution. The hierarchical nature of these binder-free, amorphous metal hydroxide deposits leads to their superhydrophilic nature and underwater superaerophobic behavior. The combination of all of these qualities leads to exemplary catalytic performance. When directly grown on planar stainless steel substrates, these nanoforests show high OER activity with overpotentials as low as ∼255 mV to produce a current density of 10 mA cm over 10 000 accelerated stability test cycles. This work demonstrates a novel fabrication technique that can simultaneously achieve a dendritic hierarchical structure, vertical alignment, superaerophobicity, amorphous crystal structure, and intimate contact with the substrate that leads to high catalytic activity with excellent durability.

show abstract

Synthesis and characterization of polycrystalline Sn and SnO2 films with wire morphologies

Cited by 23 publications

References 14 publications

Surface properties of SnO2 nanowires for enhanced performance with dye-sensitized solar cells

Surface properties of SnO2 nanowires for enhanced performance with dye-sensitized solar cells

Generation of Tin(II) Oxide Crystals on Lead-Free Solder Joints in Deionized Water

Enhanced Oxygen Evolution Reaction Electrocatalysis via Electrodeposited Amorphous α-Phase Nickel-Cobalt Hydroxide Nanodendrite Forests

Contact Info

Product

Resources

About