Figure 10

Photo-emf spectra of the p–i–n structures. (a) R 163: (1) without bias lighting; (2)–(5) under bias lighting (Ge filter): (2) W=0.25 mW/cm²; (3) W=0.77 mW/cm²; (4) W=1.5 mW/cm²; (5) W=2.16 mW/cm²; (b) R 166: (1) without bias lighting; (2)–(6) under bias lighting (Si filter): (2) W=0.63 mW/cm²; (3) W=3.3 mW/cm²; (4) W=5.3 mW/cm²; (5) W=12 mW/cm²; (6) W=17.5 mW/cm².