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  • Xia, XinxinChinese Univ Hong Kong, Peoples R China (author)

Revealing the crystalline packing structure of Y6 in the active layer of organic solar cells: the critical role of solvent additives

  • Article/chapterEnglish2023

Publisher, publication year, extent ...

  • ROYAL SOC CHEMISTRY,2023
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:liu-198812
  • https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-198812URI
  • https://doi.org/10.1039/d3ta05177cDOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Funding Agencies|We thank the Research Grants Council (RGC) of Hong Kong (General Research Fund No. 14303519) and CUHK direct grant (no. 4442384). We also thank the beam time and technical support provided by the 19U2 beamline at SSRF, Shanghai. We appreciate Prof. Michael
  • The bulk heterojunction (BHJ) morphology of photovoltaic materials is crucial to the fundamental optoelectronic properties of organic solar cells (OSCs). However, in the photoactive layer, the intrinsic crystalline packing structure of Y6, currently the hallmark molecule among Y-series non-fullerene acceptors (NFAs), has not been unambiguously determined. Here, employing grazing-incidence wide-angle X-ray scattering (GIWAXS), we managed to uncover the intrinsic crystalline packing structure of Y6 in the BHJ active layer of OSCs, which is found to be different from its single-crystal structure reported previously. Moreover, we find that solvent additive 1-chloronaphthalene (CN) can induce highly ordered packing of Y6 in BHJ thin films. With the help of atomistic molecular dynamics simulations, it is revealed that pi-pi interactions generally exist between naphthalene derivatives and IC terminals of Y6 analogues, which would essentially improve their long-range ordering. Our work reveals the intrinsic crystalline packing structure of Y6 in the BHJ active layer as well as its crystallization mechanism in thin films, thus providing direct correlations between this crystalline packing and the device characteristics and photophysical properties.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Mei, LeCity Univ Hong Kong, Peoples R China (author)
  • He, ChengliangZhejiang Univ, Peoples R China (author)
  • Chen, ZengZhejiang Univ, Peoples R China (author)
  • Yao, Nannan,1992-Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten(Swepub:liu)nanya79 (author)
  • Qin, MinchaoChinese Univ Hong Kong, Peoples R China (author)
  • Sun, RuiWuhan Univ, Peoples R China (author)
  • Zhang, ZhenzhenChinese Acad Sci, Peoples R China (author)
  • Pan, YuyuCity Univ Hong Kong, Peoples R China (author)
  • Xiao, YiqunChinese Univ Hong Kong, Peoples R China (author)
  • Lin, YuzeChinese Acad Sci, Peoples R China (author)
  • Min, JieWuhan Univ, Peoples R China (author)
  • Zhang, FenglingLinköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten(Swepub:liu)fenzh60 (author)
  • Zhu, HaimingZhejiang Univ, Peoples R China (author)
  • Bredas, Jean-LucUniv Arizona, AZ 85721 USA (author)
  • Chen, HongzhengZhejiang Univ, Peoples R China (author)
  • Chen, Xian-KaiCity Univ Hong Kong, Peoples R China (author)
  • Lu, XinhuiChinese Univ Hong Kong, Peoples R China (author)
  • Chinese Univ Hong Kong, Peoples R ChinaCity Univ Hong Kong, Peoples R China (creator_code:org_t)

Related titles

  • In:Journal of Materials Chemistry A: ROYAL SOC CHEMISTRY11:40, s. 21895-219072050-74882050-7496

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