Germanium-lead perovskite light-emitting diodes
| Autor: | Baodan Zhao, Min Rao, Yaxiao Lian, Yao Cheng, Runchen Lai, Dexin Yang, Dexuan Huo, Dongchen Lan, Guoling Zhang, Dawei Di |
|---|---|
| Přispěvatelé: | Yang, Dexin [0000-0002-6903-3324], Lai, Runchen [0000-0002-5827-8991], Lan, Dongchen [0000-0001-6684-7421], Di, Dawei [0000-0003-0703-2809], Apollo - University of Cambridge Repository |
| Rok vydání: | 2021 |
| Předmět: |
147/135
120 147/137 General Physics and Astronomy 02 engineering and technology 639/301/1019 01 natural sciences 639/624/1020 law.invention Environmental impact law 128 40 Engineering 3403 Macromolecular and Materials Chemistry Multidisciplinary 34 Chemical Sciences Photovoltaic system article 021001 nanoscience & nanotechnology Electrical and electronic engineering 3406 Physical Chemistry Optoelectronics 0210 nano-technology 147/143 Light-emitting diode Materials science Photoluminescence 147/3 145 Science chemistry.chemical_element 639/166/987 Germanium 010402 general chemistry 4016 Materials Engineering General Biochemistry Genetics and Molecular Biology Lead (geology) 704/172/4081 Lasers LEDs and light sources 140/125 Perovskite (structure) business.industry General Chemistry 0104 chemical sciences Semiconductor chemistry business Luminescence Materials for optics |
| Zdroj: | Nature Communications, Vol 12, Iss 1, Pp 1-7 (2021) Nature Communications |
| Popis: | Reducing environmental impact is a key challenge for perovskite optoelectronics, as most high-performance devices are based on potentially toxic lead-halide perovskites. For photovoltaic solar cells, tin-lead (Sn–Pb) perovskite materials provide a promising solution for reducing toxicity. However, Sn–Pb perovskites typically exhibit low luminescence efficiencies, and are not ideal for light-emitting applications. Here we demonstrate highly luminescent germanium-lead (Ge–Pb) perovskite films with photoluminescence quantum efficiencies (PLQEs) of up to ~71%, showing a considerable relative improvement of ~34% over similarly prepared Ge-free, Pb-based perovskite films. In our initial demonstration of Ge–Pb perovskite LEDs, we achieve external quantum efficiencies (EQEs) of up to ~13.1% at high brightness (~1900 cd m−2), a step forward for reduced-toxicity perovskite LEDs. Our findings offer a new solution for developing eco-friendly light-emitting technologies based on perovskite semiconductors. Lead toxicity poses a big hurdle for the commercialization of perovskite optoelectronics, hence reducing the environmental impact holds the answer for its future application. To tackle this challenge, the authors utilize germanium to reduce the lead content, enabling highly luminescent eco-friendly compound for LEDs. |
| Databáze: | OpenAIRE |
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