Intense Visible Luminescence in CdSe Quantum Dots by Efficiency Surface Passivation with H<sub>2</sub>O Molecules

Park, Hyeoung Woo; Kim, Do-Hyung

doi:10.1155/2012/892506

Cited by 3 publications

(1 citation statement)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[66,67] Another solution for the poor PLQE of QDs is the shelling of inorganic atomic layers with a wider bandgap on the surface of core QDs, which enhances the PLQE by effectively reducing the nonradioactive recombination. [68] Although the PLQE of core-only QDs has been reported to be lower than 50%, the best reported values of PLQE are around 80% for inorganic-shelled QDs, which is competitive with organic species. Another important factor that has an influence on the device efficiency is the arrangement of energy levels, which controls the density of charge carrier in the layers.…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

Modeling and numerical simulation of electrical and optical characteristics of a quantum dot light-emitting diode based on the hopping mobility model: Influence of quantum dot concentration

Sheykholeslami-Nasab¹,

Davoudi-Darareh²,

Yousefi³

2022

Chinese Phys. B

View full text Add to dashboard Cite

We present a comprehensive numerical framework for the electrical and optical modeling and simulation of hybrid quantum dot light-emitting diodes (QD-LEDs). We propose a model known as hopping mobility to calculate the carrier mobility in the emissive organic layer doped with quantum dots (QDs). To evaluate the ability of this model to describe the electrical characteristics of QD-LEDs, the measured data of a fabricated QD-LED with different concentrations of QDs in the emissive layer were taken, and the corresponding calculations were performed based on the proposed model. The simulation results indicate that the hopping mobility model can describe the concentration dependence of the electrical behavior of the device. Then, based on the continuity equation for singlet and triplet excitons, the exciton density profiles of the devices with different QD concentrations were extracted. Subsequently, the corresponding luminance characteristics of the devices were calculated, where the results are in good agreement with the experimental data.

show abstract

Section: Simulation Results and Discussionmentioning

confidence: 99%