(i) An intrinsic semiconductor will behave as insulator at \(T = 0text{ K}\).
(ii) Doping pure silicon with trivalent impurities gives p-type semiconductors.
(iii) The majority carriers in n-type semiconductors are electrons.
(iv) Solar cell works when it is in forward bias.
The correct statements(s) is/are
Solution:
At \(T = 0text{ K}\), all electrons are in the valence band, so an intrinsic semiconductor acts as an insulator. Trivalent doping creates p-type, and n-type has majority electron carriers. Solar cells do not require external bias to operate. Thus, statements (i), (ii), and (iii) are correct.
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