Fishing – trapping – and vermin destroying
Patent
1989-11-29
1991-12-31
Chaudhuri, Olik
Fishing, trapping, and vermin destroying
437 88, 437101, 437110, 437154, 136258, H01L 21205
Patent
active
050772236
ABSTRACT:
A photoelectric conversion device has a non-single-crystal semiconductor laminate member formed on a substrate having a conductive surface, and a conductive layer formed on the non-single-crystal semiconductor laminate member. The non-single-crystal semiconductor laminate member has such a structure that a first non-single-crystal semiconductor layer having a P or N first conductivity type, an I-type second non-single-crystal semiconductor layer and a third non-single-crystal semiconductor layer having a second conductivity type opposite the first conductivity type are laminated in this order. The first (or third) non-single-crystal semiconductor layer is disposed on the side on which light is incident, and is P-type. The I-type non-single-crystal semiconductor layer has introduced thereinto a P-type impurity, such as boron which is distributed so that its concentration decreases towards the third (or first) non-single-crystal semiconductor layer in the thickwise direction of the I-type layer.
REFERENCES:
Magee et al., "Investigation of the Hydrogen and Impurity Contents of Amorphous Silicon by Secondary Ion Mass Spectrometry", Solar Cells, 2(1980), 365-376, Elsevier Sequoia S.A., Lausanne-Netherlands.
Chaudhuri Olik
Ojan Ourmazd S.
Semiconductor Energy Laboratory Co,. Ltd.
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