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  • Wu, HaimeiXian Modern Chem Res Inst, Peoples R China (författare)

Effects of the Isomerized Thiophene-Fused Ending Groups on the Performances of Twisted Non-Fullerene Acceptor-Based Polymer Solar Cells

  • Artikel/kapitelEngelska2020

Förlag, utgivningsår, omfång ...

  • 2020-05-04
  • American Chemical Society (ACS),2020
  • printrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:liu-166850
  • https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-166850URI
  • https://doi.org/10.1021/acsami.0c03842DOI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • Funding Agencies|Natural Science Foundation of ChinaNational Natural Science Foundation of China [51903206, 21875182]; Innovation Capability Support Program of Shaanxi [2016KCT-28]; Key Research and Development Program of Shaanxi [2017ZDXM-GY-046, 2018GY-122, 2020GY-288]; Natural Science Basic Research Program of Shaanxi [2020JQ-985]; Science and Technology Program of Xian [201805035YD13CG19(1)]; Ministry of Science and Technology of ChinaMinistry of Science and Technology, China [2016YFA0200700]; Office of Science, Office of Basic Energy Sciences, of the U.S. Department of EnergyUnited States Department of Energy (DOE) [DE-AC0205CH11231]
  • Recently, benefiting from the merits of small-molecule acceptors (NFAs), polymer solar cells (PSCs) have achieved tremendous advances. From the perspective of the structural characteristics of the pi-conjugated acceptor-donor-acceptor (A-D-A) type of organic molecules, the backbones planarity and the terminal groups and their substituents have strong influences on the performances of the constructed NFAs. Through enlarging the dihedral angle of the conjugated main chain of NFAs, a certain degree of enhancement of photovoltaic parameters has been achieved. To further probe the influences of ending groups on the performances of nonplanar NFAs, we synthesized two new NFAs i-cc23 and i-cc34 with isomerized thiophene-fused ending groups and a twisted pi-conjugated main chain. Compared to i-cc23 containing the 2-(6-oxo-5,6-dihydro-4H-cyclopenta[b]thiophen-4-ylidene)malononitrile ending group, the acceptor i-cc34 containing 2-(6-oxo-5,6-dihydro-4H-cyclopenta[c]thiophen-4-ylidene)malononitrile has a relatively higher molar extinction coefficient, bathochromic-shifted absorption spectrum, and deepened energy levels. When mixed with PBDB-T in solar cells, the i-cc23-based device achieved an excellent open-circuit voltage (V-OC) of 1.10 V and a moderate power conversion efficiency of 7.34%. Although the V-OC of the i-cc34-related device was decreased to 0.96 V, the short-circuit current density and fill factor were improved, giving rise to an enhanced efficiency of 9.51%. Apart from the distinct photovoltaic performances, the two isomer-based devices exhibit a high radiative efficiency of 8 x 10(-4), leading to a very small nonradiative loss of 0.19 V. Our results emphasize the importance of the isomerized thiophene-fused ending groups on the performances of nonplanar NFA-based PSCs.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Bian, QingzhenLinköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten(Swepub:liu)qinbi65 (författare)
  • Zhao, BaofengXian Modern Chem Res Inst, Peoples R China (författare)
  • Zhao, HengXi An Jiao Tong Univ, Peoples R China (författare)
  • Wang, LiuchangXian Univ, Peoples R China (författare)
  • Wang, WeipingXian Modern Chem Res Inst, Peoples R China (författare)
  • Cong, ZhiyuanXian Modern Chem Res Inst, Peoples R China (författare)
  • Liu, JianqunXian Modern Chem Res Inst, Peoples R China (författare)
  • Ma, WeiXi An Jiao Tong Univ, Peoples R China (författare)
  • Gao, ChaoXian Modern Chem Res Inst, Peoples R China (författare)
  • Xian Modern Chem Res Inst, Peoples R ChinaBiomolekylär och Organisk Elektronik (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:ACS Applied Materials and Interfaces: American Chemical Society (ACS)12:21, s. 23904-239131944-82441944-8252

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