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Alloying from screen-printed aluminum pastes containing boron additives
- Publication Year :
- 2013
-
Abstract
- We present a detailed study on alloying from screen-printed aluminum pastes containing boron additives (Al-B pastes) to further enhance the efficiency of p- and n-type silicon solar cells with an Al-alloyed back-surface field and rear emitter, respectively. Due to the high B solubility in Si, the additional incorporation of B atoms as acceptors into the Al-alloyed p+ region-referred to as Al-B codoping of Si-provides improved shielding of electrons from the recombination-active surface. Thus, alloying from Al-B pastes allows for significantly thinner p + regions and leads to a considerable reduction of the p + saturation current densities. By comparing surface-passivated p+ regions alloyed from Al-B pastes or conventional Al pastes with each other, we show that a highly recombination-active defect limits the minority carrier lifetime in these p+ regions. We demonstrate that the acceptor concentration profiles of the p+ regions can easily be modified by adding different amounts of aluminum diboride or boron trioxide as B sources to the Al pastes.
- Subjects :
- inorganic chemicals
Materials science
Silicon
Passivation
Herstellung und Analyse von hocheffizienten Solarzellen
Inorganic chemistry
chemistry.chemical_element
Boron trioxide
chemistry.chemical_compound
Aluminium
Dotierung und Diffusion
Electrical and Electronic Engineering
Boron
Kontaktierung und Strukturierung
Solarzellen - Entwicklung und Charakterisierung
Doping
technology, industry, and agriculture
Carrier lifetime
equipment and supplies
Condensed Matter Physics
Acceptor
Electronic, Optical and Magnetic Materials
Silicium-Photovoltaik
chemistry
Chemical engineering
Industrielle und neuartige Solarzellenstrukturen
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....f18ec61f8303cb748356d35cdb8b0e8e