Ab initio electronic stopping power for protons in Ga_0.5In_0.5P/GaAs/Ge triple-junction solar cells for space applications.

ABSTRACT: Motivated by the radiation damage of solar panels in space, firstly, the results of Monte Carlo particle transport simulations are presented for proton impact on triple-junction Ga_0.5In_0.5P/GaAs/Ge solar cells, showing the proton projectile penetration in the cells as a function of energy. It is followed by a systematic ab initio investigation of the electronic stopping power (ESP) for protons in different layers of the cell at the relevant velocities via real-time time-dependent density functional theory calculations. The ESP is found to depend significantly on different channelling conditions, which should affect the low-velocity damage predictions, and which are understood in terms of impact parameter and electron density along the path. Additionally, we exp

SUBMITTER: Koval NE 

PROVIDER: S-EPMC7735329 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature