which scientist is known for the shockley-queisser limit and the bipolar junction transistor ?
select distinct var_uri where brack_open var_uri dbo_knownFor dbr_Shockley-Queisser_limit sep_dot var_uri rdf_type dbo_Scientist sep_dot var_uri dbo_knownFor dbr_Bipolar_junction_transistor sep_dot brack_close