Multiscale modeling of solar cells with interface phenomena

Autor:	Foster, David H., Costa, Timothy, Peszynska, Malgorzata, Schneider, Guenter
Rok vydání:	2013
Předmět:	Physics - Computational Physics Condensed Matter - Mesoscale and Nanoscale Physics
Druh dokumentu:	Working Paper
Popis:	We describe a mathematical model for heterojunctions in semiconductors which can be used, e.g., for modeling higher efficiency solar cells. The continuum model involves well-known drift-diffusion equations posed away from the interface. These are coupled with interface conditions with a nonhomogeneous jump for the potential, and Robin-like interface conditions for carrier transport. The interface conditions arise from approximating the interface region by a lower-dimensional manifold. The data for the interface conditions are calculated by a Density Functional Theory (DFT) model over a few atomic layers comprising the interface region. We propose a domain decomposition method (DDM) approach to decouple the continuum model on subdomains which is implemented in every step of the Gummel iteration. We show results for CIGS/CdS, Si/ZnS, and Si/GaAs heterojunctions. Comment: 27 pages, 10 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1309.1882 Zobrazit plný text záznamu View this record from Arxiv