Close-space sublimation(CSS)has been demonstrated as an alternative vacuum deposition technique for fabricating organic light-emitting diodes(OLEDs).CSS utilizes a planar donor plate pre-coated with organic thin films...Close-space sublimation(CSS)has been demonstrated as an alternative vacuum deposition technique for fabricating organic light-emitting diodes(OLEDs).CSS utilizes a planar donor plate pre-coated with organic thin films as an area source to rapidly transfer the donor film to a device substrate at temperatures below 200℃.CSS is also conformal and capable of depositing on odd-shaped substrates using flexible donor media.The evaporation behaviors of organic donor films under CSS were fully characterized using model OLED materials and CSS-deposited films exhibited comparable device performances in an OLED stack to films deposited by conventional point sources.The low temperature and conformal nature of CSS,along with its high material utilization and short process time,make it a promising method for fabricating flexible OLED displays.展开更多
密闭空间爆炸所导致的壁面超压是设计结构抗爆的重要参数之一,但爆炸冲击波测试试验因成本高、布线困难等原因,造成可获得壁面有效测点相对较少,故研究使用壁面较少测点重构壁面全部测点信息具有重要意义。采用少量测点的初到峰值超压...密闭空间爆炸所导致的壁面超压是设计结构抗爆的重要参数之一,但爆炸冲击波测试试验因成本高、布线困难等原因,造成可获得壁面有效测点相对较少,故研究使用壁面较少测点重构壁面全部测点信息具有重要意义。采用少量测点的初到峰值超压结合壁面反射公式,通过遗传算法求得箱型密闭空间内爆心的等效位置和爆炸当量,将其作为中间量,并结合镜像法和非线性叠加处理多波耦合效应(linear and acoustic model for the boundary)的方法,对壁面冲击波超压进行重构,从而求得壁面上各点的超压分布。表明,遗传算法得到的爆心位置和当量的最大相对偏差分别为3.64%和4.44%,箱型密闭空间壁面上测点的最大超压预测值与仿真值的最大相对偏差为17.6%。该模型预测内爆炸壁面冲击波测点的最大超压峰值与仿真结果较为吻合,验证了该方法的有效性。展开更多
基金financially supported by the General Research Fund(16309918)from the Research Grant Council,Hong Kongfunding from the Institute for Advanced Study of the Hong Kong University of Science and Technology。
文摘Close-space sublimation(CSS)has been demonstrated as an alternative vacuum deposition technique for fabricating organic light-emitting diodes(OLEDs).CSS utilizes a planar donor plate pre-coated with organic thin films as an area source to rapidly transfer the donor film to a device substrate at temperatures below 200℃.CSS is also conformal and capable of depositing on odd-shaped substrates using flexible donor media.The evaporation behaviors of organic donor films under CSS were fully characterized using model OLED materials and CSS-deposited films exhibited comparable device performances in an OLED stack to films deposited by conventional point sources.The low temperature and conformal nature of CSS,along with its high material utilization and short process time,make it a promising method for fabricating flexible OLED displays.
文摘密闭空间爆炸所导致的壁面超压是设计结构抗爆的重要参数之一,但爆炸冲击波测试试验因成本高、布线困难等原因,造成可获得壁面有效测点相对较少,故研究使用壁面较少测点重构壁面全部测点信息具有重要意义。采用少量测点的初到峰值超压结合壁面反射公式,通过遗传算法求得箱型密闭空间内爆心的等效位置和爆炸当量,将其作为中间量,并结合镜像法和非线性叠加处理多波耦合效应(linear and acoustic model for the boundary)的方法,对壁面冲击波超压进行重构,从而求得壁面上各点的超压分布。表明,遗传算法得到的爆心位置和当量的最大相对偏差分别为3.64%和4.44%,箱型密闭空间壁面上测点的最大超压预测值与仿真值的最大相对偏差为17.6%。该模型预测内爆炸壁面冲击波测点的最大超压峰值与仿真结果较为吻合,验证了该方法的有效性。
