给受体型共轭聚合物的附生结晶行为研究

闫敬越; 李明芯; 刘贞玲; 王俊杰; 卜振卿; 刘玉敏; 高灿; 董焕丽

doi:10.11777/j.issn1000-3304.2026.26171

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给受体型共轭聚合物的附生结晶行为研究

研究论文 | 更新时间：2026-10-15

- 给受体型共轭聚合物的附生结晶行为研究
- Epitaxial Crystallization Behavior of Donor-Acceptor Conjugated Polymers
- 高分子学报 2026年页码：1-13
- 作者机构：
  
  1.中国科学院化学研究所北京分子科学国家重点实验室北京 100190
  2.青岛科技大学高性能有机光学聚合物与先进制造技术全国重点实验室青岛 266042
  3.中国科学院大学北京 100049
- 作者简介：
  
  E-mail: liuyumin@iccas.ac.cn;
  cangao@iccas.ac.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2026.26171
  中图分类号：
- CSTR：32057.14.GFZXB.2026.7679
- 收稿：2026-05-31，
  
  录用：2026-07-14，
  
  网络首发：2026-10-15，
- 稿件说明：
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闫敬越, 李明芯, 刘贞玲, 王俊杰, 卜振卿, 刘玉敏, 高灿, 董焕丽. 给受体型共轭聚合物的附生结晶行为研究. 高分子学报, doi: 10.11777/j.issn1000-3304.2026.26171.

Yan, J. Y.; Li, M. X.; Liu, Z. L.; Wang, J. J.; Bu, Z. Q.; Liu, Y. M.; Gao, C.; Dong, H. L. Epitaxial crystallization behavior of donor-acceptor conjugated polymers. Acta Polymerica Sinica (in Chinese), doi: 10.11777/j.issn1000-3304.2026.26171.
闫敬越, 李明芯, 刘贞玲, 王俊杰, 卜振卿, 刘玉敏, 高灿, 董焕丽. 给受体型共轭聚合物的附生结晶行为研究. 高分子学报, doi: 10.11777/j.issn1000-3304.2026.26171. DOI： CSTR： 32057.14.GFZXB.2026.7679.

Yan, J. Y.; Li, M. X.; Liu, Z. L.; Wang, J. J.; Bu, Z. Q.; Liu, Y. M.; Gao, C.; Dong, H. L. Epitaxial crystallization behavior of donor-acceptor conjugated polymers. Acta Polymerica Sinica (in Chinese), doi: 10.11777/j.issn1000-3304.2026.26171. DOI： CSTR： 32057.14.GFZXB.2026.7679.

摘要

给受体(D-A)型共轭聚合物因其独特的分子内电荷转移特性，在有机场效应晶体管、有机太阳能电池等光电器件领域展现出重要的应用潜力. 分子链的高度有序排列是构筑载流子与激子高效传输通道、实现优异光电性能的关键前提，然而如何在薄膜尺度上精准调控D-A共轭聚合物的取向结构，仍是该领域面临的重要挑战. 本研究基于附生结晶策略，利用取向聚乙烯(PE)基底与共轭聚合物之间的晶格匹配关系，成功制备了2种高度取向的D-A型共轭聚合物薄膜. 角分辨偏振紫外-可见吸收光谱及拉曼光谱测试表明，2种聚合物薄膜均呈现出显著的光学各向异性，分子链实现了单轴取向排列. 透射电子显微镜与二维掠入射X射线衍射进一步揭示，2种聚合物薄膜在PE基底上分布均匀、连续致密、结晶性良好. 两者均以edge-on构型外延生长于基底表面，主链取向方向与PE分子链方向一致，形成清晰的外延晶格匹配关系. 本研究表明，附生结晶策略可有效诱导D-A共轭聚合物的取向生长，为精准调控共轭聚合物薄膜微观结构提供了普适性实验路径，并为大面积高取向光电薄膜的可控制备奠定了重要基础.

Abstract

Donor-acceptor (D-A) conjugated polymers show great promise in organic field-effect transistors and organic solar cells due to their intramolecular charge transfer

yet achieving large-area

precisely controlled molecular orientation remains challenging. Here

we employed an epitaxial crystallization strategy on oriented polyethylene (PE) substrates to fabricate highly oriented thin films of two D-A polymers

BDTI-2F2T and IIDSiC

. Angle-resolved polarized UV-Vis absorption and Raman spectroscopy revealed significant optical anisotropy and uniaxial molecular alignment in both films

while transmission electron microscopy and two-dimensional grazing-incidence X-ray diffraction confirmed uniform

dense morphologies with good crystallinity. Both polymers adopted an edge-on configuration with backbones parallel to the PE chain direction

establishing a clear epitaxial lattice relationship. Spin-coating from

-dichlorobenzene (5 mg/mL

2000 r/min

180 s) yielded dichroic ratios of 1.46 (686 nm) and 1.05 (696 nm) from polarized UV-Vis absorption

and four-lobed Raman patterns for C＝C stretching (1441 and 1435 cm

-1

) confirmed uniaxial order

with energy-dispersive X-ray spectroscopy showing homogeneous sulfur distribution. Lattice mismatches between the polymer (010) and PE (110) planes were only 5% for BDTI-2F2T and 3% for IIDSiC

while IIDSiC

exhibited denser

π-π

stacking (

=0.153 nm

-1

) than BDTI-2F2T (0.156 nm

-1

)

favoring charge transport.

关键词

Keywords

references

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