{HEAD ~ Suitable p type dopants} for use in the present invention include Group 1 , {TAIL ~ Group} 11 , Group 5 , and Group 15 , with arsenic being preferred 
{ HEAD ~ Suitable p type dopants } for use in the present invention include Group 1 , { TAIL ~ Group } 11 , Group 5 , and Group 15 , with arsenic being preferred
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