Upconversion Photoluminescence Properties of Er3+-Doped Ca12Al14O33 Aluminate Ceramics

Fabrication and electron emission of [Ca24Al24.08Zr3.92O64]4+(4e−) electrides

“…[27][28][29][30][31][32][33][34][35][36] In recent years, related scholars have conducted research on [Ca 24 Al 24.08 Zr 3.92 O 64 ] 4+ (4e − ) in catalytic reactions and electron emission. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] Some scholars found [Ca 24 Al 24.08 Zr 3.92 O 64 ] 4+ (4e − ) has an extremely low intrinsic work function (∼2.4 eV), and the value is lower than the noble metal Ru (∼4.7 eV). 2,4,34 Subsequently, it is used as a support for the Ru catalyst, and electrons lost in the Ru-catalyzed reaction can be replenished from the [Ca 24 Al 24.08 Zr 3.92 O 64 ] 4+ (4e − ).…”

“…In recent years, related scholars have conducted research on [Ca 24 Al 24.08 Zr 3.92 O 64 ] 4+ (4e − ) in catalytic reactions and electron emission 1–20 . Some scholars found [Ca 24 Al 24.08 Zr 3.92 O 64 ] 4+ (4e − ) has an extremely low intrinsic work function (∼2.4 eV), and the value is lower than the noble metal Ru (∼4.7 eV) 2,4,34 .…”

“…[1][2][3][4][5][6][7][8][9][10] Its crystal structure is composed of high-density (∼10 21 cm −3 ) subnanometer cage cavities and there are electron transmission channels between cage cavities (as shown in Figure 1). [2][3][4][5][6][7][8] This cage structure with electronic storage enables [Ca 24 Al 24.08 Zr 3.92 O 64 ] 4+ (4e − ) to have good physical and chemical stability, low work function (∼2.4 eV), [16][17][18][19][20][21][22][23][24][25][26][27][28] and outstanding electron emission potential. 5 Therefore, it is a potential material for catalytic reaction, thermoelectric conversion, and electron emission.…”