蓝色发射CaS:Cu,F薄膜的发光特性

Proceedings of 5th Asian Symposium on Information Display. ASID '99 (IEEE Cat. No.99EX291) Pub Date : 1999-03-18 DOI:10.1109/ASID.1999.762714

Y. Nakanishi, A. Kawasumi, T. Aoki, H. Tatsuoka, H. Kuwabara, Y. Hatanaka

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引用次数: 0

摘要

研究了电子束蒸发法制备的CaS:Cu,F薄膜的结构和发光性能。当退火温度高于750/spl℃时，薄膜呈现出[110]取向，且随着退火温度的升高，薄膜的结晶度有所提高。退火后的薄膜在室温下具有435 nm和450 nm的光谱峰，在较长的波长处有较宽的发射光谱，在高于750/spl℃的温度下退火后435 nm的发射光谱占优势。时间分辨发射光谱的测量表明，无论是荧光粉还是薄膜的蓝色发光都不是由于D-A对的复合，而是由于Cu/sup +/离子的电子内跃迁。

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Luminescent properties of blue-emitting CaS:Cu,F thin films

Structural and luminescent properties of CaS:Cu,F thin films prepared by the electron beam evaporation have been investigated. The film annealed at higher than 750/spl deg/C showed [110] orientation and the crystallinity of the film was improved with increasing annealing temperature. The annealed films showed spectra with peaks at 435 and 450 nm and broad emission at longer wavelength at room temperature, and the 435 nm emission became dominant by the annealing at temperatures higher than 750/spl deg/C. It was suggested from the measurement of the time-resolved emission spectra that the blue luminescence of not only the phosphor but also the film is not due to D-A pair recombination but due to the intraionic transition in the Cu/sup +/ ion.

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Proceedings of 5th Asian Symposium on Information Display. ASID '99 (IEEE Cat. No.99EX291)

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