Silicon Materials

Fell, Andreas

doi:10.1002/9781118927496.ch8

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“…These doped regions can act as emitters, back-surface fields (BSFs), and floating junctions in solar cell structures. [1][2][3][4][5][6][7][8] LD can be performed in an ambient atmosphere at room temperature. In LD, only the irradiated area is heated and impurities diffuse to the substrate without thermal damage.…”

Section: Introductionmentioning

confidence: 99%

Surface polarity control to reinforce dopant adhesion in laser doping of textured silicon

Nishimura¹,

Okamura²,

Yamamoto³

et al. 2014

Jpn. J. Appl. Phys.

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Increasing energy conversion efficiency without any extra cost is required for crystalline silicon (c-Si) solar cells. Laser doping (LD) can meet these requirements because it can be performed in an ambient atmosphere at room temperature. In this study, spin-coated phosphorus silicate glass (PSG) was formed on textured c-Si as a precursor for LD. We found that after LD, the reinforcement of the interface between PSG and the Si surface improved the photovoltaic characteristics V oc and J sc. The interface was reinforced by changing the c-Si surface from hydrophobic to hydrophilic before spin coating. The reinforced interface led to a reduction in the number of surface voids and an enhancement of the transfer of dopant atoms.

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