Enhancement of the blue photoluminescence intensity for the porous silicon with HfO2 filling into microcavities.
With HfO2 filled into the microcavities of the porous single-crystal silicon, the blue photoluminescence was greatly enhanced at room temperature. On one hand, HfO2 contributes to the light emission with the transitions of the defect levels for oxygen vacancy. On the other hand, the special filling-into-microcavities structure of HfO2 leads to the presence of ferroelectricity, which greatly enhances the blue emission from porous silicon. Since both HfO2 and Si are highly compatible with Si-based electronic industry, combined the low-cost and convenient process, the HfO2-filled porous Si shows a promising application prospect.
School of Physics, Shandong University, Jinan 250100, China.
Ran
R
Jiang
School of Physics, Shandong University, Jinan 250100, China.
Xianghao
X
Du
School of Physics, Shandong University, Jinan 250100, China.
Weideng
W
Sun
School of Physics, Shandong University, Jinan 250100, China.
Zuyin
Z
Han
School of Physics, Shandong University, Jinan 250100, China.
Zhengran
Z
Wu