窄带隙酞菁薄膜在1．3μm波段的近红外发光特性

Near-Infrared Luminescence Characteristics at 1.3μm Range of Narrow Band-Gap Phthalocyanines Thin Film

有机化合物的光活性主要由其能级带隙决定，通过扩展酞菁分子的共轭体系和在大环外围进行拉电子基团修饰，实现了有机小分子材料的近红外发光。合成了一种外围缩合4个1，10-啉啡哕啉单元的氮杂酞菁，并制备了溶液沉积薄膜样品。实验测得分子的最大吸收波长达到1μm以上，光致发光（PL）波长则达到了1．3μm波段，这是重要的光通信窗口波长。进行了电化学循环伏安测试，计算得到氮杂酞菁的带隙为1．1eV，这一窄带隙能级结构进一步验证了其近红外光活性。为开发有机近红外光学材料提供了新的思路和实验数据。

The optical activities of organic compounds are dertermined by their energy band gaps. By extending the conjugated system of phthalocyanine molecule and adding peripheral electrophilic subunits, near-infrared emitting of organic molecule materials is realized. A new aza phthalocyanine containing four 1,10-phenanthroline subunits is synthesized and thin-film samples are prepared. The maximum absorption wavelength reaches beyond 1 μm. The photoluminescence （PL） spectra show emission wavelength is at the range of 1.3 μm, which is one of the important optical communication wavelengths. The cyclic voltammetry measurement is performed. The energy band-gap is determined to be 1.1 eV. The narrow band-gap further verifies its near-infrared optical activity. This paper provides some experimental data for developing organic NIR materials.