期刊
LANGMUIR
卷 36, 期 23, 页码 6605-6609出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.0c00107
关键词
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资金
- National Natural Science Foundation of China [51672267, 61974145]
- Jilin Provincial Science and Technology Development Program [20180101186JC]
In previous reports of the literature, ZnO nanoparticles were unexceptionally used as the electron transportation material in highly efficient CdSe-based quantum dot light-emitting diodes (QD-LEDs). However, as an amphoteric oxide, ZnO nanoparticles are chemically unstable in air. Here, we utilize quantum-sized SnO2 nanoparticles as the electron transportation layer (ETL) of CdSebased QD-LEDs. Decreasing the size of SnO2 nanoparticles will upshift the conduction band from -4.50 to -3.84 eV based on the quantum size effect, which is beneficial to facilitate electron injection into the QD emitting layer. Our investigations show that QD-LEDs based on quantum-sized SnO2 nanoparticles exhibit comparable electroluminescence properties and higher stability in contrast to ZnO nanoparticle-based QD-LEDs, demonstrating that small-sized SnO2 nanoparticles have a bright prospect due to the ETL in QD-LEDs.
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