Photoluminescence properties and device application of CsPb 2 Br 5 quantum dots in glasses
| Autor: | Weidong Xiang, Meiling He, Yinzi Cheng, Xiaojuan Liang, Lei Zhou, Pengzhi Li, Jutao Jiang, Xueqin Yu |
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| Rok vydání: | 2018 |
| Předmět: |
Photoluminescence
Materials science business.industry Borosilicate glass Mechanical Engineering Doping Phosphor 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Mechanics of Materials Quantum dot Optoelectronics General Materials Science Thermal stability 0210 nano-technology business Luminous efficacy Diode |
| Zdroj: | Materials Research Bulletin. 105:63-67 |
| ISSN: | 0025-5408 |
| DOI: | 10.1016/j.materresbull.2018.04.028 |
| Popis: | Herein, CsPb2Br5 quantum dots (QDs) in glasses under various durations of heat-treatment at 420 °C was investigated. Photoluminescence (PL) spectra of CsPb2Br5 QDs were tuned from 499 to 506 nm and the decay time show a increasing for the structure defect and electron-hole consist in CsPb2Br5 QDs glasses. The CsPb2Br5 glass showed an thermal stability with about 85% emission loss when elevating temperature from 298 K to 433 K. Moreover, The warm white light emitting diode (WLED) was realized through incorporating CaAlSiN3:Eu2+ red phosphor with CsPb2Br5 QDs doped borosilicate glasses on an InGaN blue chip. Finally, we achieved a luminous efficacy of 42.7 lm/W, CCT of 3915 K and CRI of 68.5 under 20 mA current driving. |
| Databáze: | OpenAIRE |
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