Photocarrier extraction in GaAsSb/GaAsN type-II QW superlattice solar cells

Autor:	Aeberhard, Urs, Gonzalo, Alicia, Ulloa, Jose María
Rok vydání:	2018
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Materials Science Physics - Applied Physics Physics - Optics
Druh dokumentu:	Working Paper
DOI:	10.1063/1.5030625
Popis:	Photocarrier transport and extraction in GaAsSb/GaAsN type-II quantum well superlattices are investigated by means of inelastic quantum transport calculations based on the non-equilibrium Green's function formalism. Evaluation of the local density of states and of the spectral current flow enables the identification of different regimes for carrier localization, transport, and extraction as a function of configurational parameters. These include the number of periods, the thicknesses of the individual layers in one period, the built-in electric field, and the temperature of operation. The results for the carrier extraction efficiency are related to experimental data for different symmetric GaAsSb/GaAsN type-II quantum well superlattice solar cell devices and provide a qualitative explanation for the experimentally observed dependence of photovoltaic device performance on period thickness. Comment: 5 pages, 7 figures; accepted for publication in Applied Physics Letters
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1805.03555 Zobrazit plný text záznamu View this record from Arxiv