Conjugated Alkylamine by Two‐Step Surface Ligand Engineering in CsPbBr3 Perovskite Nanocrystals for Efficient Light‐Emitting Diodes
Source abstract
Abstract
Abstract Long alkyl‐chain capped ligands are prerequisites for preserving high photoluminescence quantum yield (PLQY) in perovskite nanocrystals (NCs). Unfortunately, the insulating feature of surface ligands potentially hinders carrier transport in light‐emitting diode (LED) devices, which will degenerate the LED performance. To overcome this shortcoming, we introduce a conjugated molecule, 3‐phenyl‐2‐propen‐1‐amine (PPA), into CsPbBr3 NCs through a two‐step surface ligand engineering process. Owing to excellent electrical conductivity of PPA, PPA‐capped CsPbBr3 NCs LEDs exhibit a maximum current efficiency of 23.53 cd A−1, and a maximum luminance of 26,475 cd m−2 at the wavelength of 517 nm. This work offers a new strategy to improve the quality of CsPbBr3 NCs and LEDs by introducing conjugation molecular ligands into the all‐inorganic perovskite nanocrystals.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Organic Light-Emitting Diodes Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry Nankai University Tianjin 300071 P.R. China
College of Physics and Materials Science Henan Normal University Xinxiang 453007 P. R. China
Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300071 P.R. China
Funding
National Natural Science Foundation of China · Natural Science Foundation of Tianjin
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