Please use this identifier to cite or link to this item:
http://hdl.handle.net/1942/28601
Title: | Impact of Triplet Excited States on the Open-Circuit Voltage of Organic Solar Cells | Authors: | Benduhn, Johannes PIERSIMONI, Fortunato Londi, Giacomo Kirch, Anton Widmer, Johannes Koerner, Christian Beljonne, David Neher, Dieter SPOLTORE, Donato VANDEWAL, Koen |
Issue Date: | 2018 | Publisher: | WILEY-V C H VERLAG GMBH | Source: | ADVANCED ENERGY MATERIALS, 8(21) (Art N° 1800451) | Abstract: | The best organic solar cells (OSCs) achieve comparable peak external quantum efficiencies and fill factors as conventional photovoltaic devices. However, their voltage losses are much higher, in particular those due to nonradiative recombination. To investigate the possible role of triplet states on the donor or acceptor materials in this process, model systems comprising Zn- and Cu-phthalocyanine (Pc), as well as fluorinated versions of these donors, combined with C-60 as acceptor are studied. Fluorination allows tuning the energy level alignment between the lowest energy triplet state (T-1) and the charge-transfer (CT) state, while the replacement of Zn by Cu as the central metal in the Pcs leads to a largely enhanced spin-orbit coupling. Only in the latter case, a substantial influence of the triplet state on the nonradiative voltage losses is observed. In contrast, it is found that for a large series of typical OSC materials, the relative energy level alignment between T-1 and the CT state does not substantially affect nonradiative voltage losses. | Notes: | [Benduhn, Johannes; Kirch, Anton; Widmer, Johannes; Koerner, Christian; Spoltore, Donato; Vandewal, Koen] Tech Univ Dresden, Dresden Integrated Ctr Appl Phys & Photon Mat IAP, Nothnitzer Str 61, D-01187 Dresden, Germany. [Benduhn, Johannes; Kirch, Anton; Widmer, Johannes; Koerner, Christian; Spoltore, Donato; Vandewal, Koen] Tech Univ Dresden, Inst Appl Phys, Nothnitzer Str 61, D-01187 Dresden, Germany. [Piersimoni, Fortunato; Neher, Dieter] Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany. [Londi, Giacomo; Beljonne, David] Univ Mons, Chim Mat Nouveaux, Pl Parc 20, B-7000 Mons, Belgium. [Londi, Giacomo; Beljonne, David] Univ Mons, Ctr Innovat & Rech Mat Polymeres, Pl Parc 20, B-7000 Mons, Belgium. [Widmer, Johannes] Heliatek GmbH, Treidlerstr 3, D-01139 Dresden, Germany. [Koerner, Christian] Organ Elect Saxony, Wurzburger Str 51, D-01187 Dresden, Germany. [Vandewal, Koen] Hasselt Univ, Inst Mat Res IMO IMOMEC, Wetenschapspk 1, B-3590 Diepenbeek, Belgium. | Keywords: | charge-transfer states; nonradiative voltage losses; organic solar cells; triplet excited states;charge-transfer states; nonradiative voltage losses; organic solar cells; triplet excited states | Document URI: | http://hdl.handle.net/1942/28601 | ISSN: | 1614-6832 | e-ISSN: | 1614-6840 | DOI: | 10.1002/aenm.201800451 | ISI #: | 000445666000006 | Rights: | 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2019 |
Appears in Collections: | Research publications |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
benduhn 1.pdf Restricted Access | Published version | 1.56 MB | Adobe PDF | View/Open Request a copy |
jbenduhn_manuscript_2018-03-09_pd.pdf | Peer-reviewed author version | 678.63 kB | Adobe PDF | View/Open |
SCOPUSTM
Citations
12
checked on Sep 7, 2020
WEB OF SCIENCETM
Citations
35
checked on Apr 30, 2024
Page view(s)
126
checked on Sep 5, 2022
Download(s)
348
checked on Sep 5, 2022
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.