Improvement of color conversion and efficiency droop in hybrid light-emitting diodes utilizing an efficient non-radiative resonant energy transfer

• DOI: 10.1063/1.4964403
• Publication Date: 2016-10-05T20:59:32Z
• Authors: Zhe Zhuang; Jiangping Dai; Bin Liu; Xu Guo; Yi Li; Tao Tao; Ting Zhi; Guogang Zhang; Zili Xie; Haixiong Ge; Yi Shi; Youdou Zheng; Rong Zhang
• Keywords: Quantum Efficiency

Blue InGaN/GaN nanohole light-emitting diodes have been fabricated by soft UV-curing nanoimprint lithography, filling with CdSe/ZnS core/shell nanocrystals (NCs) as color conversion mediums. The excitonic recombination dynamics of hybrid were investigated time-resolved photoluminescence, observing a significant reduction in the decay lifetime excitons result an efficient non-radiative resonant energy transfer, which leads to improvement and efficiency droop these compared nanocrystals/standard planar diodes. color-conversion effective quantum yield nearly twice much those standard A model on process was proposed explore this situation, explaining advantages transfer that avoiding loss associated intermediate light emission steps transferring non-radiatively resonantly NCs higher yield. validly suppressed bare ones, even better than It mainly results from extraction excess carrier concentrations multiple wells via rapid under injection condition, revealing great potential realize white emitters future.