Efficient Quantum-Dot Light-Emitting Diodes With 4,4,4-Tris(N-Carbazolyl)-Triphenylamine (TcTa) Electron-Blocking Layer


four,4,4-tris(N-carbazolyl)-triphenylamine (TcTa) with low electron mobility are used as electron-blocking layer (EBL) for quantum-dot light-emitting diodes (QD-LEDs). With TcTa EBL, electrons are effectively blocked, whereas holes are efficiently injected; consequently, the developed QD-LEDs exhibit significantly improved performance. Most external quantum efficiency of 5% and maximum luminance of 16 710 cd/m $^mathbf 2$ are achieved, which represent a two.7-fold and a a pair of-fold improvement, respectively, compared with those of the devices while not TcTa EBL.

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