Spectroscopic Ellipsometry Analysis and Quantum Efficiency Simulation of CuInSe2 Solar Cells
- Resource Type
- Conference
- Authors
- Sapkota, Dhurba R.; Shan, Ambalanath; Ramanujam, Balaji; Pradhan, Puja; Irving, Richard; Phillips, Adam B.; Heben, Michael J.; Ellingson, Randy J.; Marsillac, Sylvain; Podraza, Nikolas J.; Collins, Robert W.
- Source
- 2022 IEEE 49th Photovoltaics Specialists Conference (PVSC) Photovoltaics Specialists Conference (PVSC), 2022 IEEE 49th. :0407-0412 Jun, 2022
- Subject
- Aerospace
Components, Circuits, Devices and Systems
Engineered Materials, Dielectrics and Plasmas
Photonics and Electrooptics
Power, Energy and Industry Applications
Photovoltaic systems
Analytical models
Photonic band gap
Photovoltaic cells
Simulation
Short-circuit currents
Dielectric loss measurement
Spectroscopic Ellipsometry
CuInSe2
EQE Simulation
- Language
CuInSe 2 (CIS) thin-film solar cells in the substrate configuration were fabricated and studied using spectroscopic ellipsometry (SE). Starting with the parameterized complex dielectric functions of the individual component layers, SE analysis was performed using a step-wise procedure that ranks the fitting parameters according to their ability to reduce the mean square error of the fit. The resulting layer thicknesses and dielectric functions were used to simulate the external quantum efficiency (EQE) of the device assuming complete active layer collection. Electronic losses were identified by comparison with the measured EQE. Simulation results show that complete collection would yield a short circuit current density of 42.62 mA/cm 2 . The goal of this study is to develop and optimize 1.0 eV bandgap CIS for use as a bottom cell absorber of multijunction solar cells.