Study on Electron Emission from Phosphorus δ-Doped Si-QDs/Undoped Si-QDs Multiple-Stacked Structures. - Katsunori Makihara; Tatsuya Takemoto; Shuji Obayashi; Akio Ohta; Noriyuki Taoka; Seiichi Miyazaki (IEICE Trans. Electron., 2022)