Substitution of silver electrode with an abundant metal - A fundamental study

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

One of the fundamental bottlenecks for crystalline-Si solar cells to reach a terawatt scale is the scarcity of silver, which is used as the front finger electrode in most commercial Si solar cells today. In this paper, we examine some of the challenges related to low work-function abundant metals, such as aluminum and titanium, as a potential substitution for silver. These challenges include material resistivity, resistance to oxidation, contact resistance and alloying with Si. Valence-mending passivation is proposed as a potential solution to some of the most fundamental challenges including low Schottky barrier to n-type Si for low contact resistance and suppression of aluminum alloying with Si to prevent unintentional p-type doping into n-type Si. Preliminary results are presented on Al and Ti contacts to valence-mended Si(100) surface. Valence-mending passivation allows record-low Schottky barriers of less than 0.1 eV on n-type Si with aluminum and titanium, leading to a 29x reduction in specific contact resistance between titanium and lightly-doped n-type Si. It also suppresses silicidation on Si(100) surface up to ∼400°C with titanium as well as nickel.

Original languageEnglish (US)
Title of host publicationConference Record of the IEEE Photovoltaic Specialists Conference
Pages2947-2951
Number of pages5
DOIs
StatePublished - 2011
Externally publishedYes
Event37th IEEE Photovoltaic Specialists Conference, PVSC 2011 - Seattle, WA, United States
Duration: Jun 19 2011Jun 24 2011

Other

Other37th IEEE Photovoltaic Specialists Conference, PVSC 2011
CountryUnited States
CitySeattle, WA
Period6/19/116/24/11

Fingerprint

Silver
Substitution reactions
Contact resistance
Titanium
Electrodes
Metals
Aluminum
Alloying
Passivation
Solar cells
Nickel
Doping (additives)
Crystalline materials
Oxidation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering

Cite this

Tao, M. (2011). Substitution of silver electrode with an abundant metal - A fundamental study. In Conference Record of the IEEE Photovoltaic Specialists Conference (pp. 2947-2951). [6186564] https://doi.org/10.1109/PVSC.2011.6186564

Substitution of silver electrode with an abundant metal - A fundamental study. / Tao, Meng.

Conference Record of the IEEE Photovoltaic Specialists Conference. 2011. p. 2947-2951 6186564.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Tao, M 2011, Substitution of silver electrode with an abundant metal - A fundamental study. in Conference Record of the IEEE Photovoltaic Specialists Conference., 6186564, pp. 2947-2951, 37th IEEE Photovoltaic Specialists Conference, PVSC 2011, Seattle, WA, United States, 6/19/11. https://doi.org/10.1109/PVSC.2011.6186564
Tao M. Substitution of silver electrode with an abundant metal - A fundamental study. In Conference Record of the IEEE Photovoltaic Specialists Conference. 2011. p. 2947-2951. 6186564 https://doi.org/10.1109/PVSC.2011.6186564
Tao, Meng. / Substitution of silver electrode with an abundant metal - A fundamental study. Conference Record of the IEEE Photovoltaic Specialists Conference. 2011. pp. 2947-2951
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