Article detail · 2019
Record High External Quantum Efficiency of 19.2% Achieved in Light\u2010Emitting Diodes of Colloidal Quantum Wells Enabled by Hot\u2010Injection Shell Growth
- Year
- 2019
- Type
- article
Data source split
- YÖKSİS YÖKSİS article record
- YÖKSİS venue Advanced Materials
- Catalog match (ISSN) Advanced Materials
- OpenAlex OpenAlex enrichment (abstract, citations, topics)
Abstract
OpenAlex · English
Abstract Colloidal quantum wells (CQWs) are regarded as a highly promising class of optoelectronic materials, thanks to their unique excitonic characteristics of high extinction coefficients and ultranarrow emission bandwidths. Although the exploration of CQWs in light‐emitting diodes (LEDs) is impressive, the performance of CQW‐LEDs lags far behind other types of soft‐material LEDs (e.g., organic LEDs, colloidal‐quantum‐dot LEDs, and perovskite LEDs). Herein, high‐efficiency CQW‐LEDs reaching close to the theoretical limit are reported. A key factor for this high performance is the exploitation of hot‐injection shell (HIS) growth of CQWs, which enables a near‐unity photoluminescence quantum yield (PLQY), reduces nonradiative channels, ensures smooth films, and enhances the stability. Remarkably, the PLQY remains 95% in solution and 87% in film despite rigorous cleaning. Through systematically understanding their shape‐, composition‐, and device‐engineering, the CQW‐LEDs using CdSe/Cd 0.25 Zn 0.75 S core/HIS CQWs exhibit a maximum external quantum efficiency of 19.2%. Additionally, a high luminance of 23 490 cd m −2 , extremely saturated red color with the Commission Internationale de L'Eclairage (CIE) coordinates of (0.715, 0.283), and stable emission are obtained. The findings indicate that HIS‐grown CQWs enable high‐performance solution‐processed LEDs, which may pave the path for future CQW‐based display and lighting technologies.
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Citations
OpenAlex cited_by_count. Not a WoS or Scopus citation count; those sources have no separate column here.
144 citations
OpenAlex cited_by_count (cache / database)
45 publications in the local catalog that cite this work (OpenAlex reference match; not the full global list).
- Thickness-Tunable Self-Assembled Colloidal Nanoplatelet Films Enable Ultrathin Optical Gain Media 2020
- High-Performance Deep Red Colloidal Quantum Well Light-Emitting Diodes Enabled by the Understanding of Charge Dynamics 2022
- Deep-Red-Emitting Colloidal Quantum Well Light-Emitting Diodes Enabled through a Complex Design of Core/Crown/Double Shell Heterostructure 2022
- Deep‐Red‐Emitting Colloidal Quantum Well Light‐Emitting Diodes Enabled through a Complex Design of Core/Crown/Double Shell Heterostructure 2021
- Deep‐Red‐Emitting Colloidal Quantum Well Light‐Emitting Diodes Enabled through a Complex Design of Core/Crown/Double Shell Heterostructure 2021
- Blue-Emitting CdSe Nanoplatelets Enabled by Sulfur-Alloyed Heterostructures for Light-Emitting Diodes with Low Turn-on Voltage 2021
- Highly‐Directional, Highly‐Efficient Solution‐Processed Light‐Emitting Diodes of All‐Face‐Down Oriented Colloidal Quantum Well Self‐Assembly 2023
- Highly‐Directional, Highly‐Efficient Solution‐Processed Light‐Emitting Diodes of All‐Face‐Down Oriented Colloidal Quantum Well Self‐Assembly 2023
- Highly‐Directional, Highly‐Efficient Solution‐Processed Light‐Emitting Diodes of All‐Face‐Down Oriented Colloidal Quantum Well Self‐Assembly 2023
- Management of electroluminescence from silver-doped colloidal quantum well light-emitting diodes 2022