TY - GEN
A1 - Neher, Dieter
A1 - Kniepert, Juliane
A1 - Elimelech, Arik
A1 - Koster, L. Jan Anton
T1 - A New Figure of Merit for Organic Solar Cells with Transport-limited Photocurrents
N2 - Compared to their inorganic counterparts, organic semiconductors suffer from relatively low charge carrier mobilities. Therefore, expressions derived for inorganic solar cells to correlate characteristic performance parameters to material properties are prone to fail when applied to organic devices. This is especially true for the classical Shockley-equation commonly used to describe current-voltage (JV)-curves, as it assumes a high electrical conductivity of the charge transporting material. Here, an analytical expression for the JV-curves of organic solar cells is derived based on a previously published analytical model. This expression, bearing a similar functional dependence as the Shockley-equation, delivers a new figure of merit α to express the balance between free charge recombination and extraction in low mobility photoactive materials. This figure of merit is shown to determine critical device parameters such as the apparent series resistance and the fill factor.
T3 - Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 225
KW - Electronic and spintronic devices
KW - Semiconductors
Y1 - 2016
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-91414
ER -
TY - JOUR
A1 - Neher, Dieter
A1 - Kniepert, Juliane
A1 - Elimelech, Arik
A1 - Koster, L. Jan Anton
T1 - A New Figure of Merit for Organic Solar Cells with Transport-limited Photocurrents
JF - Scientific reports
N2 - Compared to their inorganic counterparts, organic semiconductors suffer from relatively low charge carrier mobilities. Therefore, expressions derived for inorganic solar cells to correlate characteristic performance parameters to material properties are prone to fail when applied to organic devices. This is especially true for the classical Shockley-equation commonly used to describe current-voltage (JV)-curves, as it assumes a high electrical conductivity of the charge transporting material. Here, an analytical expression for the JV-curves of organic solar cells is derived based on a previously published analytical model. This expression, bearing a similar functional dependence as the Shockley-equation, delivers a new figure of merit α to express the balance between free charge recombination and extraction in low mobility photoactive materials. This figure of merit is shown to determine critical device parameters such as the apparent series resistance and the fill factor.
KW - Electronic and spintronic devices
KW - Semiconductors
Y1 - 2016
U6 - http://dx.doi.org/10.1038/srep24861
SN - 2045-2322 (online)
VL - 6
PB - Nature Publishing Group
CY - London
ER -