Eu^(2+)-doped Na_(3)Sc_(2)(PO_(4))_(3)ionic conductor possesses superior thermal quenching(TQ)resistance,which is considered as a promising phosphor for high-power lighting applications.Yet the underlying mechanism of...Eu^(2+)-doped Na_(3)Sc_(2)(PO_(4))_(3)ionic conductor possesses superior thermal quenching(TQ)resistance,which is considered as a promising phosphor for high-power lighting applications.Yet the underlying mechanism of negative thermal quenching(NTQ)is not fully understood.In this study,we focus on upconversion(UC)and downshifting(DS)luminescence of Yb^(3+)/Er^(3+)with f-f transition rather than susceptible d-f transition of Eu^(2+)in Na_(3)Sc_(2)(PO_(4))_(3),aiming to get a more insightful view.The results show that thermally accelerated dynamic defects/ions contributes to the significant negative thermal quenching(NTQ)of UC luminescence and thermally stabilized DS luminescence by promoting the radiative transition and suppressing the non-radiative transition.The UC process with slow population rate is more susceptible to perturbation of Na+migration process with time scale equivalent to that of the former,resulting in evident NTQ of UC luminescence.This research opens an avenue for understanding the NTQ mechanism of luminescence via dynamic defects/ions.展开更多
薄膜晶体管(Thin Film Transistor,TFT)作为像素中的开关元器件,与存储电容一起组成电子纸显示器的驱动电路。本文按照柔性TFT有源层的不同进行分类:有机薄膜晶体管(Organic Thin Film Transistor,OTFT)、非晶硅薄膜晶体管(Amorphous Si...薄膜晶体管(Thin Film Transistor,TFT)作为像素中的开关元器件,与存储电容一起组成电子纸显示器的驱动电路。本文按照柔性TFT有源层的不同进行分类:有机薄膜晶体管(Organic Thin Film Transistor,OTFT)、非晶硅薄膜晶体管(Amorphous Silicon Thin Film Transistor,a-Si TFT)、金属氧化物薄膜晶体管(Metal Oxide Thin Film Transis⁃tor,MOTFT),介绍它们在柔性电子纸显示器中的研究进展,着重关注器件的柔性、电学特性以及稳定性。最后进行了对比分析,提出MOTFT有望凭借优良的电学特性、高光学透明性以及相对较低的工艺温度等优势成为驱动下一代柔性电子纸显示器的最佳候选者。展开更多
基金Supported by the National Natural Science Foundation of China(No.51322208,No.51672085)Guangdong Natural Science Foundation for Distinguished Young Scholars(No.S20120011380)+3 种基金the Department of Education of Guangdong Province(No.2013gjhz0001)Fundamental Research Funds for the Central Universities(No.2015ZP0004)Key Program of Guangzhou Scientific Research Special Project(No.201607020009)the Hundred,Thousand and Ten Thousand Leading Talent Project in Guangdong Program for Special Support of Eminent~~
文摘Eu^(2+)-doped Na_(3)Sc_(2)(PO_(4))_(3)ionic conductor possesses superior thermal quenching(TQ)resistance,which is considered as a promising phosphor for high-power lighting applications.Yet the underlying mechanism of negative thermal quenching(NTQ)is not fully understood.In this study,we focus on upconversion(UC)and downshifting(DS)luminescence of Yb^(3+)/Er^(3+)with f-f transition rather than susceptible d-f transition of Eu^(2+)in Na_(3)Sc_(2)(PO_(4))_(3),aiming to get a more insightful view.The results show that thermally accelerated dynamic defects/ions contributes to the significant negative thermal quenching(NTQ)of UC luminescence and thermally stabilized DS luminescence by promoting the radiative transition and suppressing the non-radiative transition.The UC process with slow population rate is more susceptible to perturbation of Na+migration process with time scale equivalent to that of the former,resulting in evident NTQ of UC luminescence.This research opens an avenue for understanding the NTQ mechanism of luminescence via dynamic defects/ions.
文摘薄膜晶体管(Thin Film Transistor,TFT)作为像素中的开关元器件,与存储电容一起组成电子纸显示器的驱动电路。本文按照柔性TFT有源层的不同进行分类:有机薄膜晶体管(Organic Thin Film Transistor,OTFT)、非晶硅薄膜晶体管(Amorphous Silicon Thin Film Transistor,a-Si TFT)、金属氧化物薄膜晶体管(Metal Oxide Thin Film Transis⁃tor,MOTFT),介绍它们在柔性电子纸显示器中的研究进展,着重关注器件的柔性、电学特性以及稳定性。最后进行了对比分析,提出MOTFT有望凭借优良的电学特性、高光学透明性以及相对较低的工艺温度等优势成为驱动下一代柔性电子纸显示器的最佳候选者。
