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16% efficiency all-polymer organic solar cells enabled by a finely tuned morphology via the design of ternary blend
Shandong Normal Univ, Peoples R China; Hong Kong Univ Sci & Technol, Peoples R China; Hong Kong Univ Sci & Technol, Peoples R China; Hong Kong Univ Sci & Technol, Peoples R China.
Shenzhen Technol Univ, Peoples R China.
Hong Kong Univ Sci & Technol, Peoples R China; Hong Kong Univ Sci & Technol, Peoples R China; Hong Kong Univ Sci & Technol, Peoples R China.
Zhejiang Univ, Peoples R China.
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2021 (engelsk)Inngår i: Joule, E-ISSN 2542-4351, Vol. 5, nr 4, s. 914-930Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A SUMMARY There is an urgent demand for all-polymer organic solar cells (AP-OSCs) to gain higher efficiency. Here, we successfully improve the performance to 16.09% by introducing a small amount of BN-T, a B <- N-type polymer acceptor, into the PM6:PY-IT blend. It has been found that BN-T makes the active layer, based on the PM6:PY-IT:BN-T ternary blend, more crystalline but meanwhile slightly reduces the phase separation, leading to enhancement of both exciton harvesting and charge transport. From a thermodynamic viewpoint, BN-T prefers to reside between PM6 and PY-IT, and the fraction of this fine-tunes the morphology. Besides, a significantly reduced nonradiative energy loss occurs in the ternary blend, along with the coexistence of energy and charge transfer between the two acceptors. The progressive performance facilitated by these improved properties demonstrates that AP-OSCs can possibly comparably efficient with those based on small molecule acceptors, further enhancing the competitiveness of this device type.
sted, utgiver, år, opplag, sider
CELL PRESS , 2021. Vol. 5, nr 4, s. 914-930
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-175858DOI: 10.1016/j.joule.2021.02.002ISI: 000642473100018OAI: oai:DiVA.org:liu-175858DiVA, id: diva2:1557523
Merknad

Funding Agencies|National Key Research and Development Program of China - MOST [2019YFA0705900]; Guangdong Major Project of Basic and Applied Basic Research [2019B030302007]; Guangdong-Hong Kong-Macao Joint Laboratory ofOptoelectronic and Magnetic Functional Materials [2019B121205002]; Shen Zhen Technology and Innovation Commission [JCYJ20170413173814007, JCYJ20170818113905024]; Hong Kong Research Grants CouncilHong Kong Research Grants Council [R6021-18, C6023-19G, 16309218, 16310019, 16303917]; Hong Kong Innovation and Technology Commission [ITC-CNERC14SC01, ITS/471/18]; National Natural Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC) [91433202, 21535004, 91753111, 21927811, 21790050, 21790051]; National Key Research and Development Program of China [2019YFA0705900]; Key Research, Development Program of Shandong Province [2018YFJH0502]; Key Program of the Chinese Academy of SciencesChinese Academy of Sciences [QYZDY-SSW-SLH015]; Swedish Research Council VRSwedish Research Council [2016-06146]; Shenzhen Science and Technology Innovation Commission [JCYJ20180504165709042]; Hong Kong PhD Fellowship Scheme [PF17-03929]; China Postdoctoral Science FoundationChina Postdoctoral Science Foundation [2020M671715]

Tilgjengelig fra: 2021-05-26 Laget: 2021-05-26 Sist oppdatert: 2021-05-26

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