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Title: | Emissive and charge-generating donor-acceptor interfaces for organic optoelectronics with low voltage losses | Authors: | Ullbrich, Sascha Benduhn, Johannes Jia, Xiangkun Nikolis, Vasileios C. Tvingstedt, Kristofer PIERSIMONI, Fortunato Roland, Steffen Liu, Yuan Wu, Jinhan Fischer, Axel Neher, Dieter Reineke, Sebastian SPOLTORE, Donato VANDEWAL, Koen |
Issue Date: | 2019 | Publisher: | NATURE PUBLISHING GROUP | Source: | NATURE MATERIALS, 18(5), p. 459-+ | Abstract: | Intermolecular charge-transfer states at the interface between electron donating (D) and accepting (A) materials are crucial for the operation of organic solar cells but can also be exploited for organic light-emitting diodes(1,2). Non-radiative charge-transfer state decay is dominant in state-of-the-art D-A-based organic solar cells and is responsible for large voltage losses and relatively low power-conversion efficiencies as well as electroluminescence external quantum yields in the 0.01-0.0001% range(3,4). In contrast, the electroluminescence external quantum yield reaches up to 16% in D-A-based organic light-emitting diodes(5-7). Here, we show that proper control of charge-transfer state properties allows simultaneous occurrence of a high photovoltaic and emission quantum yield within a single, visible-light-emitting D-A system. This leads to ultralow-emission turn-on voltages as well as significantly reduced voltage losses upon solar illumination. These results unify the description of the electro-optical properties of charge-transfer states in organic optoelectronic devices and foster the use of organic D-A blends in energy conversion applications involving visible and ultraviolet photons(8-11). | Notes: | [Ullbrich, Sascha; Benduhn, Johannes; Jia, Xiangkun; Nikolis, Vasileios C.; Liu, Yuan; Wu, Jinhan; Fischer, Axel; Reineke, Sebastian; Spoltore, Donato; Vandewal, Koen] Tech Univ Dresden, Dresden Integrated Ctr Appl Phys & Photon Mat IAP, Dresden, Germany. [Ullbrich, Sascha; Benduhn, Johannes; Jia, Xiangkun; Nikolis, Vasileios C.; Liu, Yuan; Wu, Jinhan; Fischer, Axel; Reineke, Sebastian; Spoltore, Donato; Vandewal, Koen] Tech Univ Dresden, Inst Appl Phys, Dresden, Germany. [Tvingstedt, Kristofer] Julius Maximilian Univ Wurzburg, Expt Phys 6, Wurzburg, Germany. [Piersimoni, Fortunato; Roland, Steffen; Neher, Dieter] Univ Potsdam, Inst Phys & Astron, Potsdam, Germany. [Vandewal, Koen] Hasselt Univ, Inst Mat Res IMO IMOMEC, Diepenbeek, Belgium. | Keywords: | Efficient Non-Fullerene;Solar-Cells;Transfer States;Exciplex;Design | Document URI: | http://hdl.handle.net/1942/30164 | ISSN: | 1476-1122 | e-ISSN: | 1476-4660 | DOI: | 10.1038/s41563-019-0324-5 | ISI #: | 000465199900016 | Rights: | 2019 Springer Nature Limited | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2020 |
Appears in Collections: | Research publications |
Files in This Item:
File | Description | Size | Format | |
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Emissive and charge.pdf Restricted Access | Published version | 3.3 MB | Adobe PDF | View/Open Request a copy |
2019-02-19_Manuscript_author version.pdf | Peer-reviewed author version | 1.22 MB | Adobe PDF | View/Open |
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