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Title: | Origins of the open-circuit voltage in ternary organic solar cells and design rules for minimized voltage losses | Authors: | WANG, Yuming Yu, Jianwei Zhang , Rui Yuan, Jun Hultmark, Sandra Johnson, Catherine E. Gallop, Nathaniel P. SIEGMUND, Bernhard Qian, Deping Zhang , Huotian Zou, Yingping Kemerink, Martijn Bakulin, Artem A. Mueller, Christian VANDEWAL, Koen Chen, Xian-Kai Gao, Feng |
Issue Date: | 2023 | Publisher: | NATURE PORTFOLIO | Source: | Nature Energy, 8 (9) , p. 978 -988 | Abstract: | The power conversion efficiency of ternary organic solar cells (TOSCs), consisting of one host binary blend and one guest component, remains limited by large voltage losses. The fundamental understanding of the open-circuit voltage (V-OC) in TOSCs is controversial, limiting rational design of the guest component. In this study, we systematically investigate how the guest component affects the radiative and non-radiative related parts of V-OC of a series of TOSCs using the detailed balanced principle. We highlight that the thermal population of charge-transfer and local exciton states provided by the guest binary blend (that is, the guest-component-based binary blend) has a significant influence on the non-radiative voltage losses. Ultimately, we provide two design rules for enhancing the V-OC in TOSCs: high emission yield for the guest binary blend and similar charge-transfer-state energies for host/guest binary blends; high miscibility of the guest component with the low gap component in the host binary blend. The performance of ternary organic solar cells is limited by voltage losses. Using the detailed balance principle, Wang et al. show how the third component of the blend affects the open-circuit voltage and delineate molecular design rules. | Notes: | Gao, F (corresponding author), Linkoping Univ, Dept Phys Chem & Biol IFM, Linkoping, Sweden.; Chen, XK (corresponding author), Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Suzhou, Peoples R China.; Chen, XK (corresponding author), Soochow Univ, Jiangsu Key Lab Adv Negat Carbon Technol, Suzhou, Peoples R China. xkchen@suda.edu.cn; feng.gao@liu.se |
Document URI: | http://hdl.handle.net/1942/41680 | ISSN: | 2058-7546 | e-ISSN: | 2058-7546 | DOI: | 10.1038/s41560-023-01309-5 | ISI #: | 001037353300001 | Rights: | The Author(s) 2023. 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. The 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/. | Category: | A1 | Type: | Journal Contribution |
Appears in Collections: | Research publications |
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