Journal
OPTICAL MATERIALS
Volume 134, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.optmat.2022.113232
Keywords
Rock-salt; ZnO; MgO; Multiple quantum well; Resonant tunneling; Light emitting diode; Electroluminescence
Categories
Funding
- National Natural Science Foundation of China [62275120, 61774083, 61306103]
- NSFC for Excellent Young Scholars [51422201]
- Talent Cultivating Plan Project of Science and Technology of Nanjing Tech University [44204130]
- Priority Academic Program Development of Jiangsu Higher Education Institution (PAPD) [38703011]
- Open Project of Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education of Northeast Normal University [130014543]
- Scientific Research Fund of Nanjing Tech University [GF201710, 39104102]
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This study demonstrates an application of rock-salt ZnO in light emitting diodes, where naked eye visible electroluminescence can be observed even at low injection current.
The rock-salt structure ZnO is favorable for optoelectronic applications due to its high symmetry and a promising rock-salt. However, this high-pressure phase is metastable under ambient conditions. This work presents experimental results for rock-salt ZnO/MgO multiple quantum well (RS-MQW) and its resonant tunneling light emitting diode (RTLED). Near ultraviolet and blue-violet electroluminescence centered at 396 nm is observed from the RTLED. The electroluminescence is naked eye visible even at a forward injection current as low as 0.5 mA. The absolute radiation fluxes in the spectral range of 365 nm-465 nm and 390 nm-400 nm reach to 246.6 mu W and 57.0 mu W, respectively, at 10 mA injection current. The luminance of the RTLED is 10643 cd/m2. This work shows an application of rock-salt ZnO in light emitting diodes.
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