| Title: |
Porphyrin-nitrogen carbon dot composites for high-performance organic light-emitting diodes |
| Authors: |
Zoi Georgiopoulou; Maria Eleni Rizou; Apostolis Verykios; Anastasia Soultati; Georgios Chatzigiannakis; Theodoros M. Triantis; Alexander Chroneos; Kalliopi Ladomenou; Athanassios G. Coutsolelos; Maria Vasilopoulou |
| Source: |
Scientific Reports, Vol 16, Iss 1 (2026) |
| Publisher Information: |
Nature Portfolio |
| Publication Year: |
2026 |
| Collection: |
Directory of Open Access Journals: DOAJ Articles |
| Subject Terms: |
Porphyrin; Carbon dots; OLEDs; Electron transport layer; Medicine; Science |
| Description: |
Fluorescent organic light-emitting diodes (OLEDs) still face major obstacles to combining high efficiency with solution processability and energy-sustainable operation. In this work, a tetra-carboxyphenyl porphyrin–nitrogen carbon dots (TCPP-NCDots) derivative is introduced as a solution-processable electron transport layer (ETL) in OLEDs based on a green–yellow emissive polymer. The structural, optical, and electronic properties of the TCPP-NCDots ETL are comprehensively characterised by ultraviolet–visible absorption spectroscopy, steady-state photoluminescence, Fourier-transform infrared spectroscopy, atomic force microscopy, and cyclic voltammetry. These studies reveal a synergistic effect of porphyrin functionalisation on the carbon dots, which improves electron injection and transport toward the emissive layer. At an optimum concentration of 1 mg mL−1, the TCPP-NCDots ETL yields a 21.6% enhancement in external quantum efficiency compared with the reference device without an ETL, while simultaneously suppressing efficiency roll-off. The optimised devices also maintain stable operation under ambient conditions, highlighting TCPP-NCDots as a promising, sustainable ETL platform for next-generation fluorescent OLEDs. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
https://doi.org/10.1038/s41598-026-35190-5; https://doaj.org/toc/2045-2322; https://doaj.org/article/91dc403d33cb456b8b656bbd89438366 |
| DOI: |
10.1038/s41598-026-35190-5 |
| Availability: |
https://doi.org/10.1038/s41598-026-35190-5; https://doaj.org/article/91dc403d33cb456b8b656bbd89438366 |
| Accession Number: |
edsbas.DADDE119 |
| Database: |
BASE |