基于三(8-羟基喹啉)铝的紫外增强薄膜研究

为了提高硅基成像器件的紫外响应,本文通过对Alq3发光机理与光致发光特性的研究,用真空蒸镀的方法制备出了基于Alq3的有机金属薄膜.通过测量Alq3薄膜的透过率、光致发光光谱和激发光谱,发现Alq3薄膜在可见波段有很好的透过性,用紫外光激发会产生较强的绿光(中心波长位于510 nm),且激发光谱宽(250～425 nm).结论表明Alq3薄膜的发射光谱能够与传统硅基成像器件的响应光谱匹配,是一种符合实际要求的紫外增强薄膜.

Investigation in UV-enhanced Coatings based on Tris(8-hydroxyquinoline) aluminum

To improve response of Si-based image sensors in the ultraviolet (UV) region, this paper has investigated the luminescence mechanism and photoluminescence properties of Tris(8-hydroxyquinoline) aluminum. In this work, an organometallic coating is evaporated Alq3 onto quartz substrates under vacuum. From the transmittance curves, photoluminescence and excitation spectra of Alq3 thin films, the films have a nice permeability in visual field, together with wide excitation spectra from ??250 nm to 425 nm. These thin films can emit much intense green radiation centered at ?=510 nm. The results show that the emission spectrum of Alq3 thin films could match well with the spectral response of the conventional silicon image sensors. Thus, the Alq3 coating is a nice UV-enhanced thin film to correspond with the actual needs.