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Title: | Degradation pathways in standard and inverted DBP-C-70 based organic solar cells | Authors: | Sherafatipour, Golnaz Benduhn, Johannes Patil, Bhushan R. Ahmadpour, Mehrad SPOLTORE, Donato Rubahn, Horst-Guenter VANDEWAL, Koen Madsen, Morten |
Issue Date: | 2019 | Publisher: | NATURE PUBLISHING GROUP | Source: | SCIENTIFIC REPORTS, 9 (Art N° 4024) | Abstract: | Achieving long-term stability in organic solar cells is a remaining bottleneck for the commercialization of this otherwise highly appealing technology. In this work, we study the performance and stability differences in standard and inverted DBP/C-70 based organic solar cells. Differences in the charge-transfer state properties of inverted and standard configuration DBP/C-70 solar cells are revealed by sensitive external quantum efficiency measurements, leading to differences in the open-circuit voltages of the devices. The degradation of standard and inverted solar cell configurations at ISOS aging test conditions (ISOS-D-3 and ISOS-T-3) was investigated and compared. The results indicate that the performance drop in the small molecule bilayer solar cells is less related to changes at the D-A interface, suggesting also a pronounced morphological stability, and instead, in the case of inverted cells, dominated by degradation at the electron transport layer (ETL) bathocuproine (BCP). Photoluminescence measurements, electron-only-device characteristics, and stability measurements show improved exciton blocking, electron transport properties and a higher stability for BCP/Ag ETL stacks, giving rise to inverted devices with enhanced performance and device stability. | Notes: | [Sherafatipour, Golnaz; Patil, Bhushan R.; Ahmadpour, Mehrad; Rubahn, Horst-Guenter; Madsen, Morten] Univ Southern Denmark, Mads Clausen Inst, SDU NanoSYD, Sonderborg, Denmark. [Benduhn, Johannes; Spoltore, Donato; Vandewal, Koen] Tech Univ Dresden, Dresden Integrated Ctr Appl Phys & Photon Mat IAP, Nothnitzer Str 61, D-01187 Dresden, Germany. [Benduhn, Johannes; Spoltore, Donato; Vandewal, Koen] Tech Univ Dresden, Inst Appl Phys, Nothnitzer Str 61, D-01187 Dresden, Germany. [Vandewal, Koen] Hasselt Univ, Inst Mat Res IMO IMOMEC, Wetenschapspk 1, B-3590 Diepenbeek, Belgium. | Document URI: | http://hdl.handle.net/1942/30229 | ISSN: | 2045-2322 | e-ISSN: | 2045-2322 | DOI: | 10.1038/s41598-019-40541-6 | ISI #: | 000460751300007 | Rights: | Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Te images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. © Te Author(s) 2019 | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2020 |
Appears in Collections: | Research publications |
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sherafatipour 1.pdf | Published version | 5.61 MB | Adobe PDF | View/Open |
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