Perovskite light-emitting diodes(PeLEDs)have emerged as promising candidates for next-generation photonics,owing to their exceptional optoelectronic properties and scalable fabrication processes,particularly for flexi...Perovskite light-emitting diodes(PeLEDs)have emerged as promising candidates for next-generation photonics,owing to their exceptional optoelectronic properties and scalable fabrication processes,particularly for flexible wearable electronics,intelligent lighting systems,and ultra-high-definition displays.This review comprehensively examines recent advancements in perovskite materials,device architectures,operational mechanisms,and optimization strategies for the functional layers of PeLEDs.Despite significant progress,the practical deployment of high-performance flexible PeLEDs(FPeLEDs)faces three major challenges:efficiency droop at high current densities,limited light extraction efficiency,and thermal management issues during operation.Future research efforts should focus on tackling these obstacles to improve the overall performance and reliability of FPeLEDs.This systematic overview aims to provide valuable insights and guidance for the development of FPeLED technology and its applications in emerging fields.展开更多
teviseuzobeptehberzoriLead-free(K_(0.5)Na_(0.5))NbO_(3)(KNN)nanopowder with perovskite structure was synthesized bymechanochemical synthesis method successfully.In order to investigate the perovskite phaseformation of...teviseuzobeptehberzoriLead-free(K_(0.5)Na_(0.5))NbO_(3)(KNN)nanopowder with perovskite structure was synthesized bymechanochemical synthesis method successfully.In order to investigate the perovskite phaseformation of KNN powders during the mechanochemical synthesis process,we set up three millingroutes with different transmission ratios(W_(v)/W_(p))acting on the mixed starting powders of Na_(2)CO_(3),K_(2)CO_(3)and Nb_(2)O_(5).KNN perovskite phase was not detected by XRD under the lowtransmission ratios-2 with the shock power of 273 W.When the transmission ratios wasincreased to-2.75 with the shock power of 683.4 W,KNN perovskite phase was formed aftermilling for 22 h.Based on these results it has been found,that in shock mode process(SMIP),thathigher shock power is helpful for the formation KNN perovskite phase.The critical shock powerPaitial and critical weight-normalized cumulative shock energy P^(*)_(critical)in KNN system are dis-cussed.Compared with SMP,when W_(v)/W_(p),=-3.5,in friction mode process(FMiP),KNN per-ovskite phase was formed after milling for 5 h.It implis that FMP benefit the formation of KNNperovslkite phase,The morphology of KNN powder was observed by transmsion electronmicroscopy(TEM).展开更多
基金supported by the National Natural Science Foundation of China(NSFC)(12364013,52463021,52203311,22461142139)the Training Plan for Academic and Technical Leaders of Major Disciplines in Jiangxi Province(20243BCE51134)the Natural Science Foundation of Jiangxi Province(20242BAB24002,20224ACB204007).
文摘Perovskite light-emitting diodes(PeLEDs)have emerged as promising candidates for next-generation photonics,owing to their exceptional optoelectronic properties and scalable fabrication processes,particularly for flexible wearable electronics,intelligent lighting systems,and ultra-high-definition displays.This review comprehensively examines recent advancements in perovskite materials,device architectures,operational mechanisms,and optimization strategies for the functional layers of PeLEDs.Despite significant progress,the practical deployment of high-performance flexible PeLEDs(FPeLEDs)faces three major challenges:efficiency droop at high current densities,limited light extraction efficiency,and thermal management issues during operation.Future research efforts should focus on tackling these obstacles to improve the overall performance and reliability of FPeLEDs.This systematic overview aims to provide valuable insights and guidance for the development of FPeLED technology and its applications in emerging fields.
基金supported by the National Natural Science Foundation of China No.50872106the National Basic Research Program of China(973 Program)No.2009CB623306.
文摘teviseuzobeptehberzoriLead-free(K_(0.5)Na_(0.5))NbO_(3)(KNN)nanopowder with perovskite structure was synthesized bymechanochemical synthesis method successfully.In order to investigate the perovskite phaseformation of KNN powders during the mechanochemical synthesis process,we set up three millingroutes with different transmission ratios(W_(v)/W_(p))acting on the mixed starting powders of Na_(2)CO_(3),K_(2)CO_(3)and Nb_(2)O_(5).KNN perovskite phase was not detected by XRD under the lowtransmission ratios-2 with the shock power of 273 W.When the transmission ratios wasincreased to-2.75 with the shock power of 683.4 W,KNN perovskite phase was formed aftermilling for 22 h.Based on these results it has been found,that in shock mode process(SMIP),thathigher shock power is helpful for the formation KNN perovskite phase.The critical shock powerPaitial and critical weight-normalized cumulative shock energy P^(*)_(critical)in KNN system are dis-cussed.Compared with SMP,when W_(v)/W_(p),=-3.5,in friction mode process(FMiP),KNN per-ovskite phase was formed after milling for 5 h.It implis that FMP benefit the formation of KNNperovslkite phase,The morphology of KNN powder was observed by transmsion electronmicroscopy(TEM).
