平板显示器中荧光检测方案(分子荧光光谱)

EMISSION·FLUORESCENCE·FORENSICS· GRATINGS F OEM·RAMAN·SPECTROSCOPIC SYSIEMS ·THIN FILMS Flat Panel Displays and Fluorescence Introduction One of the fastest-growing segments of thesemiconductor industry is concerned with a newgeneration of graphic displays for communica-tions and high-definition television setss..FForphosphors that might be used as the active me-dium in such displays， the critical characteristicsare the lifetimes and wavelengths of their emis-sions. Experiment and Results Because the lifetimes and wavelengths ofemissions were required， the SPEXRFLUOROLOG-TR steady-state andlifetimespectrofluorometer was chosen for this investiga-tion. To further complicate matters， the lifetimeof the phosphor had to be obtained in a short pe-riod (three to five minutes) because of the rap-idly changing character of the material. In addi-tion， the phosphor and matrix were highly scat-tering， so stray-light rejection was crucial. Figure 1 shows the emission spectrum of thefinal phosphor， confirming a useful visible emis-sion dominated by the 550-nm peak. In Figure 2 the results of the quick lifetimestudy (eight frequencies scanned in five minutes)indicate a three-component system， dominatedby a very fast (10s) decay. This fast emissionassures that the phosphor will produce a highquantum yield within a timeframe compatiblewith refreshing the CRT’s screen. Copyright C 2000 Jobin Yvon Inc. In the USA： Figure 1. Fluorescence emission spectrum ofthe phosphor complex， showing lumines-cence in the visible range. Figure 2. Phase-shift(+)and modulation-ratio frequency response(x) of phosphorcomplex. Conclusion This particular investigation of phosphor emis-sion characteristics was made possible by theexcellent stray-light reflection， sensitivity， andwide lifetime range of the FLUOROLOG-tproducing rapid and accurate characterization ofthe phosphor. Printed in the USA This particular investigation of phosphor emission characteristics was made possible by the excellent stray-light reflection, sensitivity, and wide lifetime range of the FLUOROLOG-τ® producing rapid and accurate characterization of the phosphor.