9140
2016
2016
eng
9
6
article
Nature Publishing Group
London
1
--
2016-04-26
--
A New Figure of Merit for Organic Solar Cells with Transport-limited Photocurrents
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.
Scientific reports
10.1038/srep24861
2045-2322
Universität Potsdam, Publikationsfonds
PA 2016_16
1386.35
online registration
24861
<a href="http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-91414">Zweitveröffentlichung in der Schriftenreihe Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe ; 225</a>
CC-BY - Namensnennung 4.0 International
Dieter Neher
Juliane Kniepert
Arik Elimelech
L. Jan Anton Koster
eng
uncontrolled
Electronic and spintronic devices
eng
uncontrolled
Semiconductors
Datenverarbeitung; Informatik
Institut für Physik und Astronomie
Referiert
Publikationsfonds der Universität Potsdam
Open Access
Universität Potsdam
9141
2016
eng
9
postprint
1
--
--
--
A New Figure of Merit for Organic Solar Cells with Transport-limited Photocurrents
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.
urn:nbn:de:kobv:517-opus4-91414
online registration
Universität Potsdam, Publikationsfonds
PA 2016_16
1386.35
<a href="http://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/9140">Bibliographieeintrag der Originalveröffentlichung/Quelle</a>
CC-BY - Namensnennung 4.0 International
Dieter Neher
Juliane Kniepert
Arik Elimelech
L. Jan Anton Koster
Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
225
eng
uncontrolled
Electronic and spintronic devices
eng
uncontrolled
Semiconductors
Datenverarbeitung; Informatik
open_access
Institut für Physik und Astronomie
Referiert
Open Access
Universität Potsdam
https://publishup.uni-potsdam.de/files/9141/pmnr225.pdf
45416
2016
2016
eng
E2348
E2349
9
6
article
Nature Publ. Group
London
1
--
--
--
A New Figure of Merit for Organic Solar Cells with Transport-limited Photocurrents
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 a 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.
Scientific reports
10.1038/srep24861
27112905
2045-2322
wos2016:2019
24861
WOS:000374757300001
Neher, D (reprint author), Univ Potsdam, Inst Phys & Astron, D-14476 Potsdam, Germany., neher@uni-potsdam.de
importub
2020-03-22T18:21:01+00:00
filename=package.tar
3b1e0ee9a8f09f9242340a87ade0b53c
Dieter Neher
Juliane Kniepert
Arik Elimelech
L. Jan Anton Koster
Institut für Physik und Astronomie
Referiert
Import
45511
2016
2016
eng
252
262
5
108
article
American Institute of Physics
Melville
1
--
--
--
Charge carrier recombination dynamics in perovskite and polymer solar cells
Time-delayed collection field experiments are applied to planar organometal halide perovskite (CH3NH3PbI3) based solar cells to investigate charge carrier recombination in a fully working solar cell at the nanosecond to microsecond time scale. Recombination of mobile (extractable) charges is shown to follow second-order recombination dynamics for all fluences and time scales tested. Most importantly, the bimolecular recombination coefficient is found to be time-dependent, with an initial value of ca. 10(-9) cm(3)/s and a progressive reduction within the first tens of nanoseconds. Comparison to the prototypical organic bulk heterojunction device PTB7:PC71BM yields important differences with regard to the mechanism and time scale of free carrier recombination. (C) 2016 AIP Publishing LLC.
Applied physics letters
10.1063/1.4944044
0003-6951
1077-3118
wos2016:2019
113505
WOS:000373058400051
Paulke, A (reprint author), Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany.
Helmholtz Energy Alliance for Hybrid Photovoltaics; Joint Graduate School HyPerCells of the University of Potsdam; Helmholtz-Zentrum Berlin; German Science Foundation (DFG) within the priority program "Elementary Processes of Organic Photovoltaics" (SPP 1355); European Union [604032]
importub
2020-03-22T19:08:01+00:00
filename=package.tar
37e631cdc293a157035750a0e65862ac
Andreas Paulke
Samuel D. Stranks
Juliane Kniepert
Jona Kurpiers
Christian Michael Wolff
Natalie Schön
Henry J. Snaith
Thomas J. K. Brenner
Dieter Neher
Institut für Physik und Astronomie
Referiert
Import