The color conversion glass ceramics which were made of borosilicate matrix co-doped(SrBaSm)Si2O2N2:(Eu^3+Ce^3+) blue-green phosphors were prepared by two-step method in co-sintering. The change in luminescence propert...The color conversion glass ceramics which were made of borosilicate matrix co-doped(SrBaSm)Si2O2N2:(Eu^3+Ce^3+) blue-green phosphors were prepared by two-step method in co-sintering. The change in luminescence properties and the drift of chromaticity coordinates(CIE) of the(SrBaSm)Si2O2N2:(Eu^3+Ce^3+) blue-green phosphors and the color conversion glass ceramics were studied in the sintering temperature range from 600℃ to 800℃. The luminous intensity and internal quantum yield(QY) of the blue-green phosphors and glass ceramics decreased with the sintering temperature increasing. When the sintering temperature increased beyond 750℃, the phosphors and the color conversion glass ceramics almost had no peak in photoluminescence(PL) and excitation(PLE) spectra. The results showed that the blue-green phosphors had poor thermal stability at higher temperature. The lattice structure of the phosphors was destroyed by the glass matrix and the Ce^3+ in the phosphors was oxidized to Ce^4+, which further caused a decrease in luminescent properties of the color conversion glass ceramics.展开更多
以Bi_2O_3-B_2O_3-ZnO为基质玻璃的原料组分,制备工艺采用传统的熔融冷却法,溶制温度950℃制备出基质玻璃。再通过低温共烧结法在基质玻璃中成功掺入Lu_(2.94-x)Y_XAl_5O_(12):0.06Ce(X=0~0.8)绿色荧光粉制备出绿色荧光玻璃。利用stc-4...以Bi_2O_3-B_2O_3-ZnO为基质玻璃的原料组分,制备工艺采用传统的熔融冷却法,溶制温度950℃制备出基质玻璃。再通过低温共烧结法在基质玻璃中成功掺入Lu_(2.94-x)Y_XAl_5O_(12):0.06Ce(X=0~0.8)绿色荧光粉制备出绿色荧光玻璃。利用stc-4000快速光谱仪和PMS-80可见光谱分析系统研究了不同电流下的LED器件光效、色温、色坐标的变化情况。结果表明,随着驱动电流从10 m A逐渐升高到30 m A,LED器件的测试光效大约下降16%,相关色温变化较小,色坐标未发生漂移。由于缺少红光成分,实验在绿色荧光玻璃上通过旋转涂覆一层红色荧光薄膜制备出高显色指数的暖白光LED,进一步推动绿色荧光玻璃在白光LED中的应用。展开更多
文摘以P型<100>硅作为衬底,采用射频磁控溅射技术,在室温下制备了氮掺杂氧化铟锡锌薄膜晶体管(ITZO TFTs),研究了氮气流量对氧化铟锡锌薄膜晶体管结构、光学、电学特性以及稳定性的影响。实验结果表明:在不同氮气流量条件下制备的氧化铟锡锌薄膜均为非晶态,在可见光范围内的平均透过率均在90%左右,光学带隙数值在3.28~3.32 e V之间变化。在氮气流量为4 m L/min时制备的ITZO TFTs,有源层与栅极电介质界面处的界面态密度(N^(max)_s)仅为4.3×10^(11)cm^(-2),场效应迁移率(μ_(FE))为18.72 cm^2/(V·s),开关比(I_(on/off))为10~6,亚阈值摆幅(S)为0.39 V/dec,电学性能最优。栅极正偏压应力测试结果表明,该器件具有最强的稳定性。因此,适量的氮掺杂可有效地实现器件氧空位的钝化,降低器件的界面态密度,提高ITZO TFTs的电学性能及稳定性。
基金Project supported by the Science and Technology Planning Project of Zhejiang Province,China(Grant No.2018C01046)Enterprise-funded Latitudinal Research Projects,China(Grant Nos.J2016-141,J2017-171,J2017-293,and J2017-243)
文摘The color conversion glass ceramics which were made of borosilicate matrix co-doped(SrBaSm)Si2O2N2:(Eu^3+Ce^3+) blue-green phosphors were prepared by two-step method in co-sintering. The change in luminescence properties and the drift of chromaticity coordinates(CIE) of the(SrBaSm)Si2O2N2:(Eu^3+Ce^3+) blue-green phosphors and the color conversion glass ceramics were studied in the sintering temperature range from 600℃ to 800℃. The luminous intensity and internal quantum yield(QY) of the blue-green phosphors and glass ceramics decreased with the sintering temperature increasing. When the sintering temperature increased beyond 750℃, the phosphors and the color conversion glass ceramics almost had no peak in photoluminescence(PL) and excitation(PLE) spectra. The results showed that the blue-green phosphors had poor thermal stability at higher temperature. The lattice structure of the phosphors was destroyed by the glass matrix and the Ce^3+ in the phosphors was oxidized to Ce^4+, which further caused a decrease in luminescent properties of the color conversion glass ceramics.
文摘以Bi_2O_3-B_2O_3-ZnO为基质玻璃的原料组分,制备工艺采用传统的熔融冷却法,溶制温度950℃制备出基质玻璃。再通过低温共烧结法在基质玻璃中成功掺入Lu_(2.94-x)Y_XAl_5O_(12):0.06Ce(X=0~0.8)绿色荧光粉制备出绿色荧光玻璃。利用stc-4000快速光谱仪和PMS-80可见光谱分析系统研究了不同电流下的LED器件光效、色温、色坐标的变化情况。结果表明,随着驱动电流从10 m A逐渐升高到30 m A,LED器件的测试光效大约下降16%,相关色温变化较小,色坐标未发生漂移。由于缺少红光成分,实验在绿色荧光玻璃上通过旋转涂覆一层红色荧光薄膜制备出高显色指数的暖白光LED,进一步推动绿色荧光玻璃在白光LED中的应用。
