| Ref.No: | 61518500 |
| Start date: | 17.07.2024 |
| End date: | 16.10.2026 |
| Approval date: | 17.07.2024 |
| Department: | APPLIED MATHEMATICAL & PHYSICAL SCIENCES |
| Sector: | PHYSICS |
| Financier: | 5η ΠΡΟΚΗΡΥΞΗ ΕΛΙΔΕΚ Υ.Δ., ELIDEK |
| Budget: | 24.300,00 € |
| Public key: | Ψ03Π46ΨΖΣ4-ΤΤΚ |
| Scientific Responsible: | Assoc. Prof. ATHANASIOS KONTOS |
| Email: | akontos@mail.ntua.gr |
| Description: | METAL HALIDE PEROVSKITE LIGHT-EMITTING DIODES (PELEDS) HAVE SHOWN GREAT POTENTIAL FOR HIGH EFFICIENCY OF MORE THAN 20%. HOWEVER, THEIR INSTABILITY IN HUMIDITY AND OXYGEN ENVIRONMENTS AS WELL AS LEAD TOXICITY, LIMIT THEIR COMMERCIALIZATION. T THIS PROJECT AIMS TO PREPARE AND STUDY LEDS BASED ON PEROVSKITE CHALCOGENIDES. THE RESEARCH WILL START WITH THE CHEMICAL SYNTHESIS OF THE PEROVSKITE CHALCOGENIDE PRECURSOR SOLUTION, FOLLOWED BY ITS CHARACTERIZATION USING SPECTROSCOPIC AND MICROSCOPIC METHODS (XRD, SEM, TEM) TO DETERMINE THE STRUCTURE, SHAPE, AND SIZE OF THE NANOCRYSTALS. THE NEXT STEP WILL BE TO CREATE A FILM ON CONDUCTING (FTO, ITO) OR SIMPLE (MICROSCOPY) GLASS AND CHARACTERIZE ITS THIN FILM PROPERTIES, INCLUDING ENERGY GAP, MORPHOLOGY (PHOTOLUMINESCENCE SPECTROSCOPY, UV-VISIBLE SPECTROSCOPY, RAMAN SPECTROSCOPY, AFM, SEM), AND CRYSTALLINITY BY X-RAY CRYSTALLOGRAPHY (XRD) THE SURFACE PROPERTIES OF THE THIN FILMS WILL ALSO BE STUDIED USING XPS AND UPS SPECTROSCOPIES. ONCE THE IDEAL ENERGY GAP, GOOD CRYSTALLIZATION, AND MORPHOLOGY ARE ACHIEVED, THE INTEGRATION OF THE PEROVSKITE CHALCOGENIDES INTO LIGHT-EMITTING DIODES WILL BE CARRIED OUT. THEN, THE LEDS WILL BE ELECTRICALLY CHARACTERIZED (CURRENT DENSITY, OPEN CIRCUIT VOLTAGE, FILL FACTOR AND FINALLY THEIR ENERGY EFFICIENCY (EQE)). FINALLY, THE STABILITY OF THE LEDS WILL BE STUDIED TO DETERMINE THEIR DURABILITY OVER TIME AND IN THE PRESENCE OF HUMIDITY AND OXYGEN. THIS RESEARCH AIMS TO FILL THE KNOWLEDGE GAP AND PROVIDE NEW INSIGHTS INTO THE FUNDAMENTAL PHYSICS OF LEDS, AS IT WILL BE THE FIRST ATTEMPT TO PREPARE LEDS BASED ON CHALCOGENIDE PEROVSKITES. |
