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Degradation Studies of Colloidal Quantum Dot Light-Emitting Diodes

  • Jie Liu (a1), Chuang Xie (a1) (a2) (a3), Yu Zhang (a1) (a4), Wenjia Hu (a1) (a3), Shawn Pickering (a1), Guanjun You (a1), Andrew Y. Wang (a2) and Jian Xu (a1)...


The degradation mechanism of CdSe/ZnS quantum dots (QDs) light-emitting diodes (LEDs) was investigated with steady-state and time-resolved photoluminescence measurements. Our study reveals that the degradation is associated with the decreasing quantum efficiency of the CdSe/ZnS QDs in the devices. Two mechanisms that cause the efficiency reduction were verified in the experiments: i.e., thermal instability and luminescence quenching.



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