Anomalous efficiency elevation of quantum-dot light-emitting diodes induced by operational degradation.

ABSTRACT: Quantum-dot light-emitting diodes promise a new generation of high-performance and solution-processed electroluminescent light sources. Understanding the operational degradation mechanisms of quantum-dot light-emitting diodes is crucial for their practical applications. Here, we show that quantum-dot light-emitting diodes may exhibit an anomalous degradation pattern characterized by a continuous increase in electroluminescent efficiency upon electrical stressing, which deviates from the typical decrease in electroluminescent efficiency observed in other light-emitting diodes. Various in-situ/operando characterizations were performed to investigate the evolutions of charge dynamics during the efficiency elevation, and the alterations in electric potential landscapes in the active devices. F

SUBMITTER: He S 

PROVIDER: S-EPMC10682488 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature