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SURFACE PASSIVATED PHOTOVOLTAIC DEVICES

CTCN Keyword Matches:

A photovoltaic device comprising a photovoltaic cell is provided. The photovoltaic cell includes an emitter layer comprising a crystalline semiconductor material and a lightly doped crystalline substrate disposed adjacent the emitter layer. The lightly doped crystalline substrate and the emitter layer are oppositely doped. Further the photovoltaic device includes a back surface passivated structure coupled to the photovoltaic cell. The structure includes a highly doped back surface field layer disposed adjacent the lightly doped crystalline substrate. The highly doped back surface field layer includes an amorphous or a microcrystalline semiconductor material wherein the highly doped back surface field layer and the lightly doped crystalline substrate are similarly doped and wherein a doping level of the highly doped back surface field layer is higher than a doping level of the lightly doped crystalline substrate. Additionally the structure may also include an intrinsic back surface passivated layer disposed adjacent the lightly doped crystalline substrate where the intrinsic back surface passivated layer includes an amorphous or a microcrystalline semiconductor material.

Benefits:

Provides surface passivated photovoltaic devices having improved conversion efficiency and light confining properties.

Date of release: