Radiation resistance of wide band gap n+/p AlInGaP solar cell for high-efficient multijunction space solar cells - Lee,H-S; Yamaguchi,M; Ekins-Daukes,NJ; Khan,A; Takamoto,T; Imaizumi,M; Ohshima,T; Itoh,H (JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 2007)