白光發(fā)光二極管為固態(tài)照明領(lǐng)域提供了新的環(huán)保機(jī)遇,大大降低了全球能源消耗和二氧化碳?xì)怏w排放。另外,它們還展現(xiàn)出低成本,易于微調(diào),可加工性,低毒性,設(shè)備制造有足夠的靈活性等優(yōu)點(diǎn)。由于它們?cè)诔志眯�、性能和制造方面不斷提�?因此需要不斷的研究以獲得更好的材料設(shè)計(jì)和制造方案。目前,白光發(fā)光二極管在人工照明、顯示系統(tǒng)、熒光生物醫(yī)學(xué)工具等領(lǐng)域都有了技術(shù)進(jìn)步。因此,它們已經(jīng)成為下一代固態(tài)照明應(yīng)用的一個(gè)有前途的組成部分。在此,制備了Bi3+/Eu3+單摻雜和共摻雜的SiO2-Al2O3-CaO-B2O3-La2O3-K2O玻璃,并系統(tǒng)地研究了其發(fā)光性能、能量轉(zhuǎn)移和熱穩(wěn)定性。分析了Bi3+的發(fā)射帶與Eu3+的激發(fā)帶之間的光譜重疊,以及Bi3+的衰減曲線,以檢驗(yàn)Bi3+到Eu3+的能量傳遞的存在。隨著Eu3+濃度的增加,可調(diào)發(fā)射顏色可實(shí)現(xiàn)從藍(lán)綠色到白色,然后再到橙紅色。在333nm的激發(fā)下可以獲得CIE坐標(biāo)為（0.348,0.333）的白光發(fā)射。通過(guò)溫度相關(guān)發(fā)射光譜,研究了Bi3+/Eu3+的抗熱猝滅性能。這些結(jié)果表明,這些玻璃是可用于無(wú)有機(jī)樹(shù)脂的W-LEDs的單相白光發(fā)光材料。摘要以硼硅酸鹽玻璃為基體,以... 

【文章來(lái)源】：浙江師范大學(xué)浙江省

【文章頁(yè)數(shù)】：56 頁(yè)

【學(xué)位級(jí)別】：碩士

【文章目錄】：
ABSTRACT
摘要
Chapter 1.Introduction
    1.1 WLEDs(white light emitting diodes WLEDs)
        1.1.1 Overview
        1.1.2 Progress in the efficiency of WLEDs
        1.1.3 Approaches and disadvantages of WLEDs
    1.2 Luminescent materials
        1.2.1 Luminescence
        1.2.2 Energy transfer
        1.2.3 Thermal quenching
    1.3 Luminescent ions
        1.3.1 Rare earth ions
        1.3.2 Eu~(3+),Bi~(3+)and Mn~(2+)ions
    1.4 Luminescent glasses
        1.4.1 Advantages and structural properties
        1.4.2 Preparation method
    1.5 Characterization technique
        1.5.1 Measurement of the absorption spectra:the spectrometer
        1.5.2 Measurement of the luminescent: the spectrofluorimeter
Chapter 2.Energy transfer and white luminescence in Bi~(3+)/Eu~(3+)luminescent oxide glasses
    2.1 Introduction
    2.2 Experimental
        2.2.1 Chemical reagents and synthesis way
        2.2.2 Characterization techniques
    2.3 Result and discussion
        2.3.1 Photoluminescent properties of Bx glasses
        2.3.2 Photoluminescent properties of E1.0 glass
        2.3.3 Photoluminescent properties of BEy glasses
        2.3.4 Thermal quenching properties of BE0.3 glass
    2.4 Conclusion
Chapter 3.A New Self-Referencing Optical Thermometry Based on Tb~(3+)-Mn~(2+)Co-dopedBorosilicate Bulk Glasses
    3.1 Introduction
    3.2 Experimantal
        3.2.1 Chemical reagents and synthesis way
        3.2.2 Characterisation techniques
    3.3 Results and discussions
        3.3.1 Transmittance and XRD-patterns
        3.3.2 Photoluminescence properties of G-Tx and G-My glasses
        3.3.3 Photoluminescent properties of G-TMy glasses
        3.3.4 Thermal sensing properties of G-TM2.0 glass
    3.4 Conclusion
Chapter 4.Summary
    4.1 Summary
References
Acknowledgement
List of publications
附件



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