Solar cells sensitizers Prof . Danilo Mustafa dmustafa@if . usp . br 450 500 550 600 650 700 750 ZnAlEu-NO 3 -BTC-P123 exc. = 295 nm, 77 K 7 F 0 7 F 4 7 F 3 7 F 2 7 F 1 5 D 0 Intensity (arb. units) Wavelength (nm) 20 nm (Opportunities for undergraduate and graduate students)