Title :
Porosity control in thin film solar cells: Two-dimensional case
Author :
Jianqiao Huang ; Orkoulas, Gerassimos ; Christofides, Panagiotis D.
Author_Institution :
Dept. of Chem. & Biomol. Eng., Univ. of California, Los Angeles, Los Angeles, CA, USA
Abstract :
This work focuses on the simulation and control of a porous silicon thin film deposition process used in the manufacture of thin film solar cell systems. Initially, the process is simulated via kinetic Monte Carlo (kMC) method on a triangular lattice. Then a closed-form differential equation model is introduced to predict the dynamics of the kMC model and closed-loop system, and the model parameters in this model are identified by fitting to open-loop kMC simulation results. Finally, a model predictive controller (MPC) is designed and results demonstrate that both film thickness and porosity can be regulated to desired values.
Keywords :
Monte Carlo methods; differential equations; porosity; predictive control; solar cells; spatial variables control; thin films; closed-form differential equation model; closed-loop system; film thickness; kMC model; kinetic Monte Carlo method; model parameters; model predictive controller; open-loop kMC simulation results; porosity control; porous silicon thin film deposition process; thin film solar cells; triangular lattice; Lattices; Mathematical model; Photovoltaic cells; Predictive models; Silicon; Substrates; Surface treatment;
Conference_Titel :
American Control Conference (ACC), 2013
Conference_Location :
Washington, DC
Print_ISBN :
978-1-4799-0177-7
DOI :
10.1109/ACC.2013.6580067
