Two-dimensional perovskites with alternating cations in the interlayer space for stable light-emitting diodes
| Autor: | Maarten B. J. Roeffaers, Masoumeh Keshavarz, Johan Hofkens, Joris Van de Vondel, Miriam C. Rodríguez González, Denys Naumenko, Paul Heremans, Steven De Feyter, Weiming Qiu, Elke Debroye, Bapi Pradhan, Yiyue Zhang, Eduard Fron, Heinz Amenitsch |
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| Jazyk: | angličtina |
| Předmět: |
Technology
Materials science QC1-999 Materials Science light-emitting diodes Materials Science Multidisciplinary 02 engineering and technology 010402 general chemistry Space (mathematics) 01 natural sciences law.invention Physics Applied ENERGY law Electrical and Electronic Engineering Nanoscience & Nanotechnology BRIGHT alternating interlayer cations Science & Technology business.industry two-dimensional perovskites Physics Optics stability 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials STATES Physical Sciences Optoelectronics Science & Technology - Other Topics 0210 nano-technology business Biotechnology Light-emitting diode |
| Zdroj: | Nanophotonics Nanophotonics, Vol 10, Iss 8, Pp 2145-2156 (2021) |
| ISSN: | 2192-8614 2192-8606 |
| DOI: | 10.1515/nanoph-2021-0037 |
| Popis: | Lead halide perovskites have attracted tremendous attention in photovoltaics due to their impressive optoelectronic properties. However, the poor stability of perovskite-based devices remains a bottleneck for further commercial development. Two-dimensional perovskites have great potential in optoelectronic devices, as they are much more stable than their three-dimensional counterparts and rapidly catching up in performance. Herein, we demonstrate high-quality two-dimensional novel perovskite thin films with alternating cations in the interlayer space. This innovative perovskite provides highly stable semiconductor thin films for efficient near-infrared light-emitting diodes (LEDs). Highly efficient LEDs with tunable emission wavelengths from 680 to 770 nm along with excellent operational stability are demonstrated by varying the thickness of the interlayer spacer cation. Furthermore, the best-performing device exhibits an external quantum efficiency of 3.4% at a high current density (J) of 249 mA/cm2 and remains above 2.5% for a J up to 720 mA cm−2, leading to a high radiance of 77.5 W/Sr m2 when driven at 6 V. The same device also shows impressive operational stability, retaining almost 80% of its initial performance after operating at 20 mA/cm2 for 350 min. This work provides fundamental evidence that this novel alternating interlayer cation 2D perovskite can be a promising and stable photonic emitter. |
| Databáze: | OpenAIRE |
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