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Mechanism study on ...
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Li, YaokaiZhejiang Univ, Peoples R China
(författare)
Mechanism study on organic ternary photovoltaics with 18.3% certified efficiency: from molecule to device
- Artikel/kapitelEngelska2022
Förlag, utgivningsår, omfång ...
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2022
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ROYAL SOC CHEMISTRY,2022
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printrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:liu-182638
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https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-182638URI
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https://doi.org/10.1039/d1ee02977kDOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
Anmärkningar
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Funding Agencies|National Key Research and Development program of China [2019YFA0705900, 2017YFA0207700]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [21734008, 51803178, 91833305, 21722404, 21674093, 61721005]; Zhejiang University; China Postdoctoral Science FoundationChina Postdoctoral Science Foundation [2017M621907, 2019T120501, 2020M671715]; S&T Innovation 2025 Major Special Program of Ningbo [2018B10055]; Knut and Alice Wallenberg FoundationKnut & Alice Wallenberg Foundation [2016.0059]; Swedish Government Research Area in Materials Science on Functional Materials at Linkoping University [SFO-Mat-LiU 200900971]; China Scholarship Council (CSC)China Scholarship Council [201708370115]; Office of Science, Office of Basic Energy Sciences, of the U.S. Department of EnergyUnited States Department of Energy (DOE) [DE-AC02-05CH11231]
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Multi-component organic photovoltaics (OPVs), e.g., ternary blends, are effective for high performance, while the fundamental understanding from the molecular to device level is lacking. To address this issue, we here systematically study the working mechanism of ternary OPVs based on non-fullerene acceptors (NFAs). With both molecular dynamics simulations and morphology characterization, we identify that when adding another larger band gap and highly miscible NFA, namely IT-4F or BTP-S2, into the PBDB-TF:BTP-eC9 blend, the NFAs undergo molecular intermixing selectively with BTP-eC9. This causes the composition-dependent band gap and charge recombination, and hence the composition-dependent V-OC. While the charge recombination still dominantly occurs at the PBDB-TF:BTP-eC9 interface, BTP-S2 or IT-4F plays an auxiliary role in facilitating charge transfer and suppressing non-radiative decay. Interestingly, intermolecular end-group packing in the intermixed blend is improved compared to that in pristine films, leading to higher carrier mobility. These synergistic effects significantly improve the power conversion efficiency of the device to an outstanding value of 18.7% (certified value of 18.3%).
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Guo, YuanQilu Univ Technol, Peoples R China
(författare)
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Chen, ZengZhejiang Univ, Peoples R China
(författare)
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Zhan, LinglingZhejiang Univ, Peoples R China
(författare)
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He, ChengliangZhejiang Univ, Peoples R China
(författare)
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Bi, ZhaozhaoXi An Jiao Tong Univ, Peoples R China
(författare)
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Yao, Nannan,1992-Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten(Swepub:liu)nanya79
(författare)
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Li, ShuixingZhejiang Univ, Peoples R China
(författare)
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Zhou, GuanqingZhejiang Univ, Peoples R China
(författare)
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Yi, YuanpingChinese Acad Sci, Peoples R China
(författare)
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Yang, Yang (Michael)Zhejiang Univ, Peoples R China
(författare)
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Zhu, HaimingZhejiang Univ, Peoples R China
(författare)
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Ma, WeiXi An Jiao Tong Univ, Peoples R China
(författare)
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Gao, Feng,1981-Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten(Swepub:liu)fenga88
(författare)
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Zhang, FenglingLinköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten(Swepub:liu)fenzh60
(författare)
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Zuo, LijianZhejiang Univ, Peoples R China; Zhejiang Univ Hangzhou Global Sci & Technol Innov, Peoples R China
(författare)
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Chen, HongzhengZhejiang Univ, Peoples R China
(författare)
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Zhejiang Univ, Peoples R ChinaQilu Univ Technol, Peoples R China
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Energy & Environmental Science: ROYAL SOC CHEMISTRY15:2, s. 855-8651754-56921754-5706
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Li, Yaokai
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Guo, Yuan
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Chen, Zeng
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Zhan, Lingling
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He, Chengliang
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Bi, Zhaozhao
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Li, Shuixing
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Zhou, Guanqing
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Yi, Yuanping
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Zhu, Haiming
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Ma, Wei
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Gao, Feng, 1981-
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Zhang, Fengling
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Zuo, Lijian
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Chen, Hongzheng
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