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Energy Procedia
Article . 2011 . Peer-reviewed
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Energy Procedia
Article
License: CC BY NC ND
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Energy Procedia
Article . 2011
License: CC BY NC ND
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https://dx.doi.org/10.34657/43...
Article . 2011
License: CC BY NC ND
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Investigation of Emitter Homogeneity on Laser Doped Emitters

Authors: Germershausen, Sven; Bartholomäus, Lars; Seidel, Ulf; Hanisch, Norbert; Schieferdecker, Anja; Küsters, Karl Heinz; Kittler, Martin; +3 Authors

Investigation of Emitter Homogeneity on Laser Doped Emitters

Abstract

The selective emitter formation by laser doping is a well known process to increase the efficiency of silicon solar cells [1], [2]. For the characterization of laser doped emitters, SIMS (Secondary Ion Mass Spectroscopy) and ECV (Electrochemical Capacitance Voltage Measurement) techniques are used to analyze the emitter profile [3]. It is very difficult to get acceptable result by SIMS on a textured surface, so only ECV can be used. It has been shown, that a charge carrier depth profile can be measured on a homogeneous emitter only by ECV. The use of laser doping results in a non-homogeneous emitter. We have shown that the emitter depth is not just a function of the pulse power, but in addition of the surface structure of the wafer. The texture seems responsible for a strong variability in the doping profile. It has been shown, that the ECV measurement is not applicable to characterize the emitter depth on laser doped areas, because of the microscopic inhomogeneities in the emitter on the macroscopic measurement area. The real emitter profiles are to complex to be characterized by SIMS or ECV. We have shown that the variation in the emitter profile is resulting from the texture in the laser-doped regions.

Keywords

Secondary ion mass spectrometry, Mass spectrometry, selective emitter, Capacitance, Macroscopic measurements, Selective emitter, Electrochemical capacitance voltage, Laser doping, Microscopic inhomogeneities, Selective emitters, Silicon wafers, 620, Doping profiles, Secondary ion mass spectroscopy, Energy(all), Doping profile, Silicon solar cells, Textured surface, doping profile

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
4
Average
Average
Average
gold