PL spectra of PVK films spin-coated or electrosprayed from the solvents (CB/DCB, DCE, or CF). (a) Normal view. (b) Enlarged view of (a). All spectra are normalized to their maximum value, and the excitation wavelength was fixed at 335 nm.
Hwang et al. Nanoscale Research Letters 2012 7:52 doi:10.1186/1556-276X-7-52