FTO玻璃衬底上锆钛酸铅多层膜的微结构与光学特性

应用化学溶液沉积法,在涂布氟掺杂SnO2的玻璃衬底上制备了具有16个周期的PbZr0.4Ti0.6O3多层膜,并对其微结构与光学性能进行了研究.测试表明,玻璃基底上的PbZr0.4Ti0.6O3多层膜具有均匀、平整、致密和无裂纹的表面形貌,呈现出由致密层和多孔疏松层交替排列构成的层状结构,且具有单一钙钛矿相.在350～900nm的波长范围内,反射光谱曲线上存在一个中心波长位于450nm、带宽约为41nm、峰值反射率超过91%的高反射率带;与反射光谱相对应,在相同频段的透射光谱曲线上出现了一个与反射带等宽、中心波长位于450nm的透射谷,谷的最小透过率小于6%.这项研究进展对拓展铁电多层膜的应用范围将有积极作用.

MICRO STRUCTURES AND OPTICAL PROPERTIES OF PbZr0.4Ti0.6O3 MULTILAYER FILMS DEPOSITED ON FTO COATED GLASS SUBSTRATE

PbZr0.4Ti0.6O3 multilayers with 16 periods have been grown on the glass substrates coated by transparent tin oxide doped with fluorine by using chemical solution deposition, and the micro-structures and optical properties of the multilayers have been investigated. The scanning electron microscope images show that the multilayers exhibit a smooth, dense and crack-free surface morphology, and a layered structure consisting of dense and porous PbZr0.4Ti0.6O3 layers. The X-ray diffraction curves of the PbZr0.4Ti0.6O3 multilayers show a single perovskite structure. The room temperature reflectance and transmittance spectra in the wavelength range of 350-900 nm display an optical reflection-band centered at 450 nm, with a peak reflectivity of 91% and a 41 nm stop-band width, and a transmission valley at 450 nm with the same band-width as the reflection band. The minimum of the transmittance is less than 6% in the valley. This investigation is helpful to enlarge the application scale of ferroelectric multilayers.