Morphology controlled nanocrystalline CsPbBr3 thin-film for metal halide perovskite light emitting diodes
| Autor: | Jin Hyuck Heo, Hyunik Park, SeongYeon Kim, Sang Hyuk Im, Bong Woo Kim, David Sunghwan Lee, Jin Kyoung Park, JunHo Kim |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
General Chemical Engineering Analytical chemistry 02 engineering and technology Electroluminescence 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Nanocrystalline material Grain size 0104 chemical sciences law.invention Crystal law Quantum efficiency Thin film 0210 nano-technology Light-emitting diode Perovskite (structure) |
| Zdroj: | Journal of Industrial and Engineering Chemistry. 97:417-425 |
| ISSN: | 1226-086X |
| DOI: | 10.1016/j.jiec.2021.02.028 |
| Popis: | Morphology and crystal grain size of inorganic CsPbBr3 metal halide perovskite (MHP) films are controllable through a diffusion-controlled anti-solvent dripping crystallization method using an anti-solvent mixture of toluene (Tol):isopropanol (IPA). The 8:2 (v:v) Tol:IPA anti-solvent enables the production of a pinhole-free CsPbBr3 MHP film with the smallest crystal grain size and the brightest photoluminescence (PL). Accordingly, the 8:2 CsPbBr3 MHP film reveals a very uniform and strong PL mapping image. As a result, the 8:2 CsPbBr3 MHP light emitting diode (LED) exhibits ∼12.8, ∼7.4, and ∼7.9 fold enhanced maximum electroluminescence (ELmax), current efficiency (CEmax), and external quantum efficiency (EQEmax) compared to the 10:0 pristine device. The optimized 8:2 MHP LED shows an ELmax of 22,298 cd/m2, CEmax of 36.65 cd/A and EQEmax of 9.64%, respectively. In addition, the 8:2 CsPbBr3 MHP LED with controlled morphology and grain size has better operating stability than the pristine device. |
| Databáze: | OpenAIRE |
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