20‐4: Efficient and Stable Red Quantum Dot Light‐Emitting Diode with Modified ZnMgO Nanoparticles

Since ZnO nanoparticles are employed as an electron transport layer in quantum dot light‐emitting diode (QLED), the electroluminescence efficiency of QLED is greatly boosted. However, the QLED stability still faces the challenge. Herein, we modify the ZnMgO nanoparticles with the thiol ligand, which can improve the efficiency and stability of QLED at the same time. As a result, the maximum external quantum efficiency of QLED is improved from 18.6% to 26.0%, accompanied by enhanced voltage sweep stability. Our work provides a practical method to enhance the performance of QLED.