Tracing the electron transport behavior in quantum-dot light-emitting diodes via single photon counting technique.

ABSTRACT: The electron injection and transport behavior are of vital importance to the performance of quantum-dot light-emitting diodes. By simultaneously measuring the electroluminescence-photoluminescence of the quantum-dot light-emitting diodes, we identify the presence of leakage electrons which leads to the discrepancy of the electroluminescence and the photoluminescence roll-off. To trace the transport paths of the leakage electrons, a single photon counting technique is developed. This technique enables us to detect the weak photon signals and thus provides a means to visualize the electron transport paths at different voltages. The results show that, the electrons, except those recombining within the quantum-dots, leak to the hole transport layer or recombine at the hole transport layer/quan

SUBMITTER: Su Q 

PROVIDER: S-EPMC11408697 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature