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28 SOLAR POWER SYSTEM PHYSICS AND TECHNOLOGIES
SI SI SI SI SI
SI SI SI SI SI
SI SI SI SI SI
P-TYPE N-TYPE
SILICONE SEMICONDUCTOR PN JUNCTION DOPPED
STRUCTURE SEMICONDUCTORS
ELECTRONS
HOLES
NEGATIVE ION FROM
FILLING OF N-TYPE
VACANCY
POSITIVE ION FROM
FILLING OF P-TYPE
N-TYPE P-TYPE N-TYPE P-TYPE
IMPURITY
P-TYPE N-TYPE P-TYPE N-TYPE
P-TYPE N-TYPE
SEMICONDUCTOR JUNCTION CURRENT FLOW
Figure 3.2 Semiconductor depletion region formation.
