Carrier recombination flux in bulk heterojunction polymer: fullerene solar cells: Effect of energy disorder on ideality factor
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Título
Carrier recombination flux in bulk heterojunction polymer: fullerene solar cells: Effect of energy disorder on ideality factorAutoría
Fecha de publicación
2013-01Editor
ElsevierCita bibliográfica
GARCIA-BELMONTE, Germà. Carrier recombination flux in bulk heterojunction polymer: fullerene solar cells: Effect of energy disorder on ideality factor. Solid-State Electronics, 2013, 79: 201-205.Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://www.sciencedirect.com/science/article/pii/S0038110112002596Versión
info:eu-repo/semantics/submittedVersionPalabras clave / Materias
Resumen
Energy disorder reduces the achievable open-circuit voltage in organic bulk-heterojunction solar cells. Here the effect of disorder on charge carrier recombination flux is numerically modeled. The recombination current ... [+]
Energy disorder reduces the achievable open-circuit voltage in organic bulk-heterojunction solar cells. Here the effect of disorder on charge carrier recombination flux is numerically modeled. The recombination current follows an exponential dependence on voltage (Fermi level splitting) parameterized by β (inverse of the diode ideality factor), which reduces the power conversion efficiency through lower fill factors. β-Parameter approaches unity (Boltzmann approximation) at room temperature only in the case of weak disorder (σ ≈ 50 meV). For larger disorder values (σ ⩾ 100 meV) usually encountered in real devices, a huge reduction in β (open-circuit voltage, and fill factor) is predicted following a relationship as β ∝ ln σ−1. [-]
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Solid-State Electronics, Volume 79, January 2013Derechos de acceso
http://rightsstatements.org/vocab/CNE/1.0/
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess
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