Characterization of electron- or proton-irradiated Si space solar cells by THz spectroscopy

Abstract

The transmission or reflection measurement of p-type Si wafers with various resistivities was performed in the THz-IR frequency region, and the carrier concentration and mobility were evaluated by a simple Drude model. The range of electrical resistivity of 100-0.01 cm and the range of carrier concentration of 1 × 10 14 to 1 × 10 19 cm −3 can be estimated non-destructively by this method. In addition, the annealing characteristics of electron-or proton-irradiated Si single crystals doped with 10 15 cm −3 boron were characterized by this method in order to study the radiation damage of space solar cells. Combined with the results of far-IR and DLTS reported previously, THz spectroscopy can explain the recovery of carriers at high fluence samples, and the reverse annealing effect at low fluence samples as regards carrier scattering time in conjunction with the defect type.

Far-infrared absorber based on standing-wave resonances in metal-dielectric-metal cavity

“…Far-infrared imaging has garnered recent interest for applications in biomedicine [1], environmental remote sensing [2], explosives detection [3], materials characterization [4,5], and astronomy [6]. Bolometric detection, in which the heat generated by far-infrared absorption is sensed, is usual in this wavelength range.…”

AREAL low energy electron beam applications in life and materials sciences

“…The nature of observed physical phenomena strongly depends on structural defects of materials (displaced atoms in crystal lattice, impurity centers, etc.) [23][24][25][26][27].…”

Tunable THz Pulses Generation in Non-Equilibrium Magnetized Plasma: The Role of Plasma Kinetics

“…The continuing interest over the years in sources of terahertz radiation is caused by their manifold applications in various fields, such as spectroscopy, material science, biology, medicine, security systems and so on [1][2][3][4][5]. Among the plasma-based methods of THz generation two-color schemes providing strong THz pulses with a very broad spectrum are the most popular [6][7][8][9][10][11].…”