UV-Ozone Treatment on Cs₂CO₃ Interfacial Layer for the Improvement of Inverted Polymer Solar Cells

Table 2

Element analysis of Cs₂CO₃ film with different time of UV-Ozone treatment.

Elements		O	Si	In	Sn	Cs	O/Cs (mol)
5 min	Wt %	22.31	22.41	31.29	2.07	21.92	8.45
	At %	52.68	30.14	10.30	0.66	6.23
10 min	Wt %	26.95	26.21	25.50	2.04	19.29	11.59
	At %	56.11	31.08	7.40	0.57	4.84
15 min	Wt %	22.37	27.91	28.93	3.21	17.57	10.56
	At %	49.88	35.45	8.99	0.97	4.72
20 min	Wt %	46.44	27.26	12.71	0.85	12.75	30.22
	At %	71.02	23.75	2.71	0.18	2.35

(Wt %: weight percent; At %: elemental mol percent; O/Cs: Mol ratio.)