Optical and Electrical Analysis of Core-Shell ZnO/ZnTe Micropillar Solar Cells

• Main Authors: Amal Kabalan, Sadia Binte Sohid
• Format: Article
• Language: English
• Published: IEEE 2020-01-01
• Series: IEEE Journal of the Electron Devices Society
• Subjects: Radial ZnO/ZnTe micropillar solar cell; variation; auger recombination; optical and electrical properties
• Online Access: https://ieeexplore.ieee.org/document/9134434/

This paper presents an investigation on the effects of micropillar physical parameters (height, pitch and diameter) on the optical and electrical performance of ZnO/ZnTe core-shell micropillar solar cells. It also studies the effect of the doping level in the absorber layer on the device's performance considering the impact of Auger's recombination. A Finite-Difference Time-Domain (FDTD) solver, Lumerical, is used for the numerical analysis. Based on the range of parameters analyzed it was concluded that for a core-shell ZnO/ZnTe micropillar solar cell a 4 μm height, a 0.5 μm pitch, a 70 nm ZnTe shell thickness and a 2.16 x 10¹⁹ cm^-3 doping concentration for ZnTe achieves an efficiency of 17%.