Unknown

Dataset Information

0

Realizing High Brightness Quasi-2D Perovskite Light-Emitting Diodes with Reduced Efficiency Roll-Off via Multifunctional Interface Engineering.


ABSTRACT: Quasi-2D perovskites have recently flourished in the field of luminescence due to the quantum-confinement effect and the efficient energy transfer between different n phases resulting in exceptional optical properties. However, owing to the lower conductivity and poor charge injection, quasi-2D perovskite light-emitting diodes (PeLEDs) typically suffer from low brightness and high-efficiency roll-off at high current densities compared to 3D perovskite-based PeLEDs, which is undoubtedly one of the most critical issues in this field. In this work, quasi-2D PeLEDs with high brightness, reduced trap density, and low-efficiency roll-off are successfully demonstrated by introducing a thin layer of conductive phosphine oxide at the perovskite/electron transport layer interface. The results surprisingly show that this additional layer does not improve the energy transfer between multiple quasi-2D phases in the perovskite film, but purely improves the electronic properties of the perovskite interface. On the one hand, it passivates the surface defects of the perovskite film; on the other hand, it promotes electron injection and prevents hole leakage across this interface. As a result, the modified quasi-2D pure Cs-based device shows a maximum brightness of > 70,000 cd m-2 (twice that of the control device), a maximum external quantum efficiency (EQE) of > 10% and a much lower efficiency roll-off at high bias voltages.

SUBMITTER: Lin YK 

PROVIDER: S-EPMC10502845 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature

altmetric image

Publications

Realizing High Brightness Quasi-2D Perovskite Light-Emitting Diodes with Reduced Efficiency Roll-Off via Multifunctional Interface Engineering.

Lin Yu-Kuan YK   Chen Chiung-Han CH   Wang Yen-Yu YY   Yu Ming-Hsuan MH   Yang Jing-Wei JW   Ni I-Chih IC   Lin Bi-Hsuan BH   Zhidkov Ivan S IS   Kurmaev Ernst Z EZ   Lu Yu-Jung YJ   Chueh Chu-Chen CC  

Advanced science (Weinheim, Baden-Wurttemberg, Germany) 20230703 26


Quasi-2D perovskites have recently flourished in the field of luminescence due to the quantum-confinement effect and the efficient energy transfer between different n phases resulting in exceptional optical properties. However, owing to the lower conductivity and poor charge injection, quasi-2D perovskite light-emitting diodes (PeLEDs) typically suffer from low brightness and high-efficiency roll-off at high current densities compared to 3D perovskite-based PeLEDs, which is undoubtedly one of th  ...[more]

Similar Datasets

| S-EPMC5807308 | biostudies-literature
| S-EPMC9873927 | biostudies-literature
| S-EPMC8044177 | biostudies-literature
| S-EPMC7804015 | biostudies-literature
| S-EPMC6247068 | biostudies-literature
| S-EPMC8943027 | biostudies-literature
| S-EPMC8866581 | biostudies-literature
| S-EPMC11791954 | biostudies-literature
| S-EPMC9565347 | biostudies-literature
| S-EPMC10151432 | biostudies-literature