Overcoming the Charge Confinement-Transport Trade-Off in Perovskite Light-Emitting Diodes
4 affiliations
- 1Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
- 2Research Institute of Advanced Materials (RIAM), Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
- 3Institute of Engineering Research, Soft Foundry, Interdisciplinary Program in Bioengineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
- 4SN Display Co., Ltd., 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
Abstract
Nanocrystalline metal halide perovskites are promising light emitters for light-emitting diodes (PeLEDs) because they suppress the intrinsic problem of exciton dissociation through charge confinement within nanocrystalline domains. Although these nanostructures have enabled high-emission efficiencies, such confinement strategies typically result in significantly reduced charge transport. This limitation is attributed to numerous grain boundaries, which induce severe charge carrier scattering and trapping, alongside insulating organic ligands typically introduced for defect passivation and size reduction. Poor charge transport increases the required operating voltage and accelerates device degradation pathways under an electrical bias, leading to limited operational lifetimes. This Review examines material design strategies intended to mitigate the competition between charge confinement and transport across various nanocrystalline perovskites. Specifically, we investigate fundamental crystal nucleation and growth mechanisms and evaluate methods to optimize grain size, aiming to minimize the grain boundary to increase charge transport while maintaining charge confinement. Passivation strategies for defect states are also evaluated, emphasizing the engineering of organic ligands to enhance their electrical conductivity while maximizing the passivation efficacy. In addition, the integration of core/shell architectures is discussed as a promising strategy. By controlling the shell composition, these structures promote efficient charge transport while maintaining high radiative recombination rates. Together, these material design strategies aim to overcome the confinement and transport trade-offs in PeLEDs.
Related
- Negative effects of oxygen and halogen species on charge extraction in perovskite solar cells with fullerene electron transport layers
- Chemical Tuning of Charge Transport Polarity in Light-Emitting Transistors Enabling Neuromorphic Display, Computing, and Optocoupler
- Capturing Transient Growth Windows for Narrow-Emitting Perovskite Nanoplatelets
- van der Waals-Guided Nanopatterning Perovskite Nanocrystal Superlattices for Active Light-Emitting Metasurfaces
- Multimodal Bioinspired Self‐Healing Composites Enabling Durable and High‐Efficiency Wearable Perovskite Light‐Emitting Diodes
BibTeX
@article{jang2026overcoming,
title = {{Overcoming the Charge Confinement-Transport Trade-Off in Perovskite Light-Emitting Diodes}},
author = {Kyung Yeon Jang and Bo-Hyun Choi and Kyoo-Hyung Lee and Chan-Yul Park and Qingsen Zeng and Tae-Woo Lee},
journal = {Chemical Reviews},
year = {2026},
month = oct,
doi = {10.1021/acs.chemrev.6c00202},
url = {https://doi.org/10.1021/acs.chemrev.6c00202},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - JOUR
TI - Overcoming the Charge Confinement-Transport Trade-Off in Perovskite Light-Emitting Diodes
AU - Kyung Yeon Jang
AU - Bo-Hyun Choi
AU - Kyoo-Hyung Lee
AU - Chan-Yul Park
AU - Qingsen Zeng
AU - Tae-Woo Lee
PY - 2026
DA - 2026/10/09
JO - Chemical Reviews
DO - 10.1021/acs.chemrev.6c00202
UR - https://doi.org/10.1021/acs.chemrev.6c00202
AB - Nanocrystalline metal halide perovskites are promising light emitters for light-emitting diodes (PeLEDs) because they suppress the intrinsic problem of exciton dissociation through charge confinement within nanocrystalline domains. Although these nanostructures have enabled high-emission efficiencies, such confinement strategies typically result in significantly reduced charge transport. This limitation is attributed to numerous grain boundaries, which induce severe charge carrier scattering and trapping, alongside insulating organic ligands typically introduced for defect passivation and size reduction. Poor charge transport increases the required operating voltage and accelerates device degradation pathways under an electrical bias, leading to limited operational lifetimes. This Review examines material design strategies intended to mitigate the competition between charge confinement and transport across various nanocrystalline perovskites. Specifically, we investigate fundamental crystal nucleation and growth mechanisms and evaluate methods to optimize grain size, aiming to minimize the grain boundary to increase charge transport while maintaining charge confinement. Passivation strategies for defect states are also evaluated, emphasizing the engineering of organic ligands to enhance their electrical conductivity while maximizing the passivation efficacy. In addition, the integration of core/shell architectures is discussed as a promising strategy. By controlling the shell composition, these structures promote efficient charge transport while maintaining high radiative recombination rates. Together, these material design strategies aim to overcome the confinement and transport trade-offs in PeLEDs.
SN - 0009-2665
SN - 1520-6890
ER -