Preparation of Polyimide/Zinc Oxide Nanocomposite Films via an Ion-Exchange Technique and Their Photoluminescence Properties

Table 2

Surface atomic concentration of the Zn²⁺-doped PI precursor film and the PI/ZnO film obtained at 350°C/7 h with initial zinc ion loadings of 803 nmol/cm².

Samples	Surface atomic concentration (%)
	C	O	N	Zn
Zn^2+-doped film	69.7	21.6	6.5	2.2
PI/ZnO film	50.1	32.7	4.0	13.2