Research on the Influence of Foreign Gases on the Optoelectronic Properties of Ga<sub>0.75</sub>Al<sub>0.25</sub>N Photocathode Surface

Table 1. Adsorption energies of different residual gases
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Table 1. Adsorption energies of different residual gases
吸附物质 H₂ CH₄ H₂O CO CO₂ Cs^[18]
吸附能/eV -2.636 -2.125 -2.224 -1.521 -2.412 -2.035

Table 2. Work functions of Ga_0.75Al_0.25N(0001) surfaces adsorbed with H₂, CH₄, H₂O, CO, CO₂, and Cs
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Table 2. Work functions of Ga_0.75Al_0.25N(0001) surfaces adsorbed with H₂, CH₄, H₂O, CO, CO₂, and Cs
吸附物 H₂ CH₄ H₂O CO CO₂ Cs^[12]
功函数/eV 4.586 4.673 4.735 4.574 4.842 2.752

Table 3. Work function variation, Mulliken charge, and dipole moments of Ga_0.75Al_0.25N(0001) surfaces adsorbed with H₂, CH₄, H₂O, CO, CO₂, and Cs

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Table 3. Work function variation, Mulliken charge, and dipole moments of Ga_0.75Al_0.25N(0001) surfaces adsorbed with H₂, CH₄, H₂O, CO, CO₂, and Cs

吸附物	H₂	CH₄	H₂O	CO	CO₂	Cs^[18]
功函数变化/eV	+0.226	+0.375	+0.413	+0.214	+0.482	-1.608
吸附物的密立根电荷数	-0.23	-0.15	-0.27	-0.18	-0.26	0.75
P_z	2.232	3.353	3.831	3.197	3.721	5.939
μ/Debye	0.850	1.410	1.553	0.805	1.812	6.046

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Yuxuan ZHU, Mingzhu YANG, Siyi HE. Research on the Influence of Foreign Gases on the Optoelectronic Properties of Ga_0.75Al_0.25N Photocathode Surface[J]. Optoelectronic Technology, 2021, 41(1): 17

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Paper Information

Category: Technology and Measurement

Received: Oct. 9, 2020

Accepted: --

Published Online: Jul. 14, 2021

The Author Email:

DOI:10.19453/j.cnki.1005-488x.2021.01.003

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Adsorption energies of different residual gases

Table 1. Adsorption energies of different residual gases

Table 2. Work functions of Ga0.75Al0.25N(0001) surfaces adsorbed with H2, CH4, H2O, CO, CO2, and Cs

Table 2. Work functions of Ga0.75Al0.25N(0001) surfaces adsorbed with H2, CH4, H2O, CO, CO2, and Cs

Table 3. Work function variation, Mulliken charge, and dipole moments of Ga0.75Al0.25N(0001) surfaces adsorbed with H2, CH4, H2O, CO, CO2, and Cs

Table 3. Work function variation, Mulliken charge, and dipole moments of Ga0.75Al0.25N(0001) surfaces adsorbed with H2, CH4, H2O, CO, CO2, and Cs

Table 2. Work functions of Ga_0.75Al_0.25N(0001) surfaces adsorbed with H₂, CH₄, H₂O, CO, CO₂, and Cs

Table 2. Work functions of Ga_0.75Al_0.25N(0001) surfaces adsorbed with H₂, CH₄, H₂O, CO, CO₂, and Cs

Table 3. Work function variation, Mulliken charge, and dipole moments of Ga_0.75Al_0.25N(0001) surfaces adsorbed with H₂, CH₄, H₂O, CO, CO₂, and Cs

Table 3. Work function variation, Mulliken charge, and dipole moments of Ga_0.75Al_0.25N(0001) surfaces adsorbed with H₂, CH₄, H₂O, CO, CO₂, and Cs