Steric-hindrance Encapsulation for Stable Deep-blue Polyfluorene Semiconductors and Improved Optoelectronic Properties

Ning Sun; Qiang Gao; Dong-yang Zheng; Li-yan Sun; Lu-bing Bai; Jin-yi Lin; Ya-min Han

doi:10.11777/j.issn1000-3304.2026.26092

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Steric-hindrance Encapsulation for Stable Deep-blue Polyfluorene Semiconductors and Improved Optoelectronic Properties

更新时间：2026-07-10

- Steric-hindrance Encapsulation for Stable Deep-blue Polyfluorene Semiconductors and Improved Optoelectronic Properties
- Acta Polymerica Sinica Pages: 1-12(2026)
- 作者机构：
  
  南京工业大学柔性电子（未来技术）学院柔性电子全国重点实验室南京 211816
- 作者简介：
  
  Ya-min Han, E-mail: iamymhan@njtech.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2026.26092
  CLC：
- CSTR：32057.14.GFZXB.2026.7639
- Received：26 March 2026，
  
  Accepted：26 May 2026，
  
  Online First：10 July 2026，
- 稿件说明：
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孙宁, 高强, 郑东阳, 孙丽燕, 白鲁冰, 林进义, 韩亚敏. 空间位阻封装实现稳定深蓝光聚芴半导体及光电性能提升. 高分子学报, doi: 10.11777/j.issn1000-3304.2026.26092.

Sun, N.; Gao, Q.; Zheng, D. Y.; Sun, L. Y. ; Bai, L. B.; Lin, J. Y.; Han, Y. M. Steric-hindrance encapsulation for stable deep-blue polyfluorene semiconductors and improved optoelectronic properties. Acta Polymerica Sinica (in Chinese), doi: 10.11777/j.issn1000-3304.2026.26092.
孙宁, 高强, 郑东阳, 孙丽燕, 白鲁冰, 林进义, 韩亚敏. 空间位阻封装实现稳定深蓝光聚芴半导体及光电性能提升. 高分子学报, doi: 10.11777/j.issn1000-3304.2026.26092. DOI： CSTR： 32057.14.GFZXB.2026.7639.

Sun, N.; Gao, Q.; Zheng, D. Y.; Sun, L. Y. ; Bai, L. B.; Lin, J. Y.; Han, Y. M. Steric-hindrance encapsulation for stable deep-blue polyfluorene semiconductors and improved optoelectronic properties. Acta Polymerica Sinica (in Chinese), doi: 10.11777/j.issn1000-3304.2026.26092. DOI： CSTR： 32057.14.GFZXB.2026.7639.

摘要

针对聚芴在实际应用中面临的分子链聚集、发光薄膜厚度依赖性等问题，本研究基于空间位阻封装策略，设计并制备了一种新型聚芴基深蓝光半导体材料PHDPF-DPA. 实验结果表明，侧链二苯胺基团的空间位阻效应赋予材料良好的热稳定性，能够有效抑制分子链间聚集，减少低能缺陷态发射，并避免水氧侵蚀，从而显著提升蓝光发射稳定性. 该材料的光物理性质无明显膜厚依赖性. 瞬态吸收测试进一步表明，位阻基团可有效削弱激子湮灭，提高激子利用率. 在光泵浦条件下，薄膜呈现出深蓝光放大自发辐射(ASE)发射，阈值为6.17 μJ/cm

，半峰宽仅1.4 nm. 以其为发光层构筑的聚合物发光二极管(PLED)实现了稳定的深蓝光电致发光. 本研究验证了空间位阻封装策略在制备高性能、稳定聚芴蓝光半导体方面的有效性，为印刷工艺在有机光电子器件制备中的应用提供了重要研究基础.

Abstract

To address the issues of molecular chain aggregation and film thickness-dependent luminescence encountered by polyfluorenes in practical applications

a novel polyfluorene-based deep-blue semiconductor material PHDPF-DPA was designed and synthesized

via

a steric hindrance encapsulation strategy in this work. The results demonstrated that the steric hindrance effect of the diphenylamine side chains endowed the material with excellent thermal stability

which could effectively suppress interchain aggregation

reduce low-energy defect emission

and prevent erosion by water and oxygen

thereby significantly improving the stability of blue-light emission. The photophysical properties of this material showed no obvious dependence on film thickness. Transient absorption measurements further revealed that the steric groups can efficiently weaken exciton annihilation and enhance exciton utilization. Under optical pumping

the film exhibited deep-blue amplified spontaneous emission (ASE) with a threshold of 6.17 μJ/cm

and a full width at half maximum (FWHM) of only 1.4 nm. Polymer light-emitting diodes (PLED) fabricated with this material as the emitting layer achieved stable deep-blue electroluminescence. This work verifies the effectiveness of the steric hindrance encapsulation strategy for constructing high-performance and stable polyfluorene-based blue-light semiconductors

and provides an important foundation for the application of printing techniques in the preparation of organic optoelectronic devices.

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Keywords

references

White M. S. ; Kaltenbrunner M. ; Głowacki E. D. ; Gutnichenko K. ; Kettlgruber G. ; Graz I. ; Aazou S. ; Ulbricht C. ; Egbe D. A. M. ; Miron M. C. ; Major Z. ; Scharber M. C. ; Sekitani T. ; Someya T. ; Bauer S. ; Sariciftci N. S. Ultrathin, highly flexible and stretchable PLEDs . Nat. Photonics , 2013 , 7 ( 10 ), 811 - 816 . doi: 10.1038/nphoton.2013.188 http://dx.doi.org/10.1038/nphoton.2013.188

Zhuo Z. Q. ; Ni M. J. ; An X. ; Bai L. B. ; Liang X. Y. ; Yang J. ; Zheng Y. Y. ; Liu B. ; Sun N. ; Sun L. L. ; Wei C. X. ; Yu N. N. ; Chen W. Y. ; Li M. Y. ; Xu M. ; Lin J. Y. ; Huang W. Intrinsically stretchable and efficient fully Π-conjugated polymer via internal plasticization for flexible deep-blue polymer light-emitting diodes with CIE y =0.08 . Adv. Mater. , 2023 , 35 ( 40 ), 2303923 . doi: 10.1002/adma.202303923 http://dx.doi.org/10.1002/adma.202303923

Li M. Y. ; Liu P. Z. ; Wang J. M. ; Pu C. P. ; Miao Y. H. ; Ren H. ; Gao R. ; Sun Z. Y. ; Lu Q. Q. ; Liu J. B. ; He D. L. ; Wu B. S. ; Bao C. X. ; Han Y. M. ; An X. ; Bai L. B. ; Xu M. ; Lin J. Y. ; Wang Y. J. ; Huang W. Printable deep-blue fluorescent light-emitting π-conjugated polymers for all-organic RGB visible light communication . Adv. Mater. , 2026 , 38 ( 16 ), e 14881 . doi: 10.1002/adma.202514881 http://dx.doi.org/10.1002/adma.202514881

Kim J. H. ; Park J. W. Intrinsically stretchable organic light-emitting diodes . Sci. Adv. , 2021 , 7 ( 9 ), eabd 9715 . doi: 10.1126/sciadv.abd9715 http://dx.doi.org/10.1126/sciadv.abd9715

Zheng H. ; Zheng Y. N. ; Liu N. L. ; Ai N. ; Wang Q. ; Wu S. ; Zhou J. H. ; Hu D. G. ; Yu S. F. ; Han S. H. ; Xu W. ; Luo C. ; Meng Y. H. ; Jiang Z. X. ; Chen Y. W. ; Li D. Y. ; Huang F. ; Wang J. ; Peng J. B. ; Cao Y. All-solution processed polymer light-emitting diode displays . Nat. Commun. , 2013 , 4 , 1971 . doi: 10.1038/ncomms2971 http://dx.doi.org/10.1038/ncomms2971

Su R. T. ; Park S. H. ; Ouyang X. ; Ahn S. I. ; McAlpine M. C. 3D-printed flexible organic light-emitting diode displays . Sci. Adv. , 2022 , 8 , eabl 8798 . doi: 10.1126/sciadv.abl8798 http://dx.doi.org/10.1126/sciadv.abl8798

Liu A. L. ; Liu Z. ; Lin H. ; Tang W. W. ; Lin Z. S. ; Zhang W. N. ; Qi Z. J. ; Gu X. F. ; Mo Y. Q. ; Hou L. T. Novel thermally self-crosslinkable diarylfluorene-based copolymers for efficient and stable blue light-emitting diodes . J. Mater. Chem. C , 2020 , 8 ( 27 ), 9303 - 9312 . doi: 10.1039/d0tc01952f http://dx.doi.org/10.1039/d0tc01952f

Lin J. Y. ; Zhu W. S. ; Liu F. ; Xie L. H. ; Zhang L. ; Xia R. D. ; Xing G. C. ; Huang W. A rational molecular design of β -phase polydiarylfluorenes: synthesis, morphology, and organic lasers . Macromolecules , 2014 , 47 ( 3 ), 1001 - 1007 . doi: 10.1021/ma402585n http://dx.doi.org/10.1021/ma402585n

Lin J. Y. ; Liu B. ; Yu M. N. ; Wang X. H. ; Lin Z. Q. ; Zhang X. W. ; Sun C. ; Cabanillas-Gonzalez J. ; Xie L. H. ; Liu F. ; Ou C. J. ; Bai L. B. ; Han Y. M. ; Xu M. ; Zhu W. S. ; Smith T. A. ; Stavrinou P. N. ; Bradley D. D. C. ; Huang W. Ultrastable supramolecular self-encapsulated wide-bandgap conjugated polymers for large-area and flexible electroluminescent devices . Adv. Mater. , 2019 , 31 , 1804811 . doi: 10.1002/adma.201804811 http://dx.doi.org/10.1002/adma.201804811

Ego C. ; Grimsdale A. C. ; Uckert F. ; Yu G. ; Srdanov G. ; Müllen K. Triphenylamine-substituted polyfluorene: a stable blue-emitter with improved charge injection for light-emitting diodes . Adv. Mater. , 2002 , 14 ( 11 ), 809 - 811 . doi: 10.1002/1521-4095(20020605)14:11<809::aid-adma809>3.0.co;2-8 http://dx.doi.org/10.1002/1521-4095(20020605)14:11<809::aid-adma809>3.0.co;2-8

Wu Y. S. ; Li J. ; Ai X. C. ; Fu L. M. ; Zhang J. P. ; Fu Y. Q. ; Zhou J. J. ; Li L. ; Bo Z. S. Interplay between the keto defect and the interchain interaction on the green emission of fluorene-based polymer . J. Phys. Chem. A , 2007 , 111 ( 45 ), 11473 - 11479 . doi: 10.1021/jp073115z http://dx.doi.org/10.1021/jp073115z

Nakamura T. ; Sharma D. K. ; Hirata S. ; Vacha M. Intrachain aggregates as the origin of green emission in polyfluorene studied on ensemble and single-chain level . J. Phys. Chem. C , 2018 , 122 ( 15 ), 8137 - 8146 . doi: 10.1021/acs.jpcc.8b01767 http://dx.doi.org/10.1021/acs.jpcc.8b01767

陈凯锋 , 刘赟 , 沈志豪 , 范星河 , 原小涛 . 空间位阻对氢键构筑的嵌段共聚物微相分离结构的影响 . 高分子学报 , 2023 , 54 ( 11 ), 1681 - 1696 . doi: 10.11777/j.issn1000-3304.2023.23071 https://dx.doi.org/10.11777/j.issn1000-3304.2023.23071

Honmou Y. ; Hirata S. ; Komiyama H. ; Hiyoshi J. ; Kawauchi S. ; Iyoda T. ; Vacha M. Single-molecule electroluminescence and photoluminescence of polyfluorene unveils the photophysics behind the green emission band . Nat. Commun. , 2014 , 5 , 4666 . doi: 10.1038/ncomms5666 http://dx.doi.org/10.1038/ncomms5666

Wang B. J. ; Ye H. ; Riede M. ; Bradley D. D. C. Chain conformation control of fluorene-benzothiadiazole copolymer light-emitting diode efficiency and lifetime . ACS Appl. Mater. Interfaces , 2021 , 13 ( 2 ), 2919 - 2931 . doi: 10.1021/acsami.0c18490 http://dx.doi.org/10.1021/acsami.0c18490

Nagai M. ; Liu J. ; Huang W. ; Kikuchi M. ; Kawaguchi S. ; Xie L. H. Molecular weight induced conformational change and its impact on β -phase formation of polydiarylfluorene in dilute solution . J. Phys. Chem. C , 2020 , 124 ( 11 ), 6304 - 6310 . doi: 10.1021/acs.jpcc.9b10899 http://dx.doi.org/10.1021/acs.jpcc.9b10899

Naimovicius L. ; Wolek L. ; Zhang S. K. ; Kim J. E. ; Tauber M. J. ; Pun A. B. Activating solid-state triplet-triplet annihilation upconversion via bulky annihilators . J. Am. Chem. Soc. , 2026 , 148 ( 3 ), 3811 - 3819 . doi: 10.1021/jacs.5c21298 http://dx.doi.org/10.1021/jacs.5c21298

万一 , 李祥春 , 薛倩 , 赖文勇 . 氢键侧链修饰共轭聚合物骨架的自愈合发光弹性体的设计合成与性能研究 . 高分子学报 , 2024 , 55 ( 6 ), 688 - 697 . doi: 10.11777/j.issn1000-3304.2024.24011 https://dx.doi.org/10.11777/j.issn1000-3304.2024.24011

Liu W. ; Zhang C. ; Alessandri R. ; Diroll B. T. ; Li Y. ; Liang H. Y. ; Fan X. C. ; Wang K. ; Cho H. ; Liu Y. D. ; Dai Y. H. ; Su Q. ; Li N. ; Li S. S. ; Wai S. ; Li Q. ; Shao S. Y. ; Wang L. X. ; Xu J. ; Zhang X. H. ; Talapin D. V. ; de Pablo J. J. ; Wang S. H. High-efficiency stretchable light-emitting polymers from thermally activated delayed fluorescence . Nat. Mater. , 2023 , 22 ( 6 ), 737 - 745 . doi: 10.1038/s41563-023-01529-w http://dx.doi.org/10.1038/s41563-023-01529-w

Zhang Z. T. ; Wang W. C. ; Jiang Y. W. ; Wang Y. X. ; Wu Y. L. ; Lai J. C. ; Niu S. M. ; Xu C. Y. ; Shih C. C. ; Wang C. ; Yan H. P. ; Galuska L. ; Prine N. ; Wu H. C. ; Zhong D. L. ; Chen G. ; Matsuhisa N. ; Zheng Y. ; Yu Z. A. ; Wang Y. ; Dauskardt R. ; Gu X. D. ; Tok J. B. H. ; Bao Z. N. High-brightness all-polymer stretchable LED with charge-trapping dilution . Nature , 2022 , 603 ( 7902 ), 624 - 630 . doi: 10.1038/s41586-022-04400-1 http://dx.doi.org/10.1038/s41586-022-04400-1

Yao W. J. ; Sui X. Q. ; Yang D. ; Hu X. G. ; Huang J. ; Tian Q. Y. ; Liu X. Y. Versatile photoluminescence polymers for printed transparent self-healing optical devices . Adv. Funct. Mater. , 2024 , 34 ( 17 ), 2313842 . doi: 10.1002/adfm.202313842 http://dx.doi.org/10.1002/adfm.202313842

Xie R. X. ; Weisen A. R. ; Lee Y. ; Aplan M. A. ; Fenton A. M. ; Masucci A. E. ; Kempe F. ; Sommer M. ; Pester C. W. ; Colby R. H. ; Gomez E. D. Glass transition temperature from the chemical structure of conjugated polymers . Nat. Commun. , 2020 , 11 , 893 . doi: 10.1038/s41467-020-14656-8 http://dx.doi.org/10.1038/s41467-020-14656-8

Wang T. S. ; Sabatini R. P. ; Chan B. ; Hou J. W. ; Huynh V. T. ; Proschogo N. ; Xie Z. X. ; Wang T. ; Gao L. ; Zhang J. Q. ; Hawkett B. S. ; Clarke R. J. ; Kepert C. J. ; Chen V. ; Lakhwani G. ; D'Alessandro D. M. Fluorescence enhancement through confined oligomerization in nanochannels: an anthryl oligomer in a metal-organic framework . ACS Mater. Lett. , 2021 , 3 ( 11 ), 1599 - 1604 . doi: 10.1021/acsmaterialslett.1c00332 http://dx.doi.org/10.1021/acsmaterialslett.1c00332

Samal S. ; Thompson B. C. Influence of alkyl chain spacer length on the charge carrier mobility of isotactic poly( N -carbazolylalkyl acrylates) . ACS Macro Lett. , 2021 , 10 ( 6 ), 720 - 726 . doi: 10.1021/acsmacrolett.1c00249 http://dx.doi.org/10.1021/acsmacrolett.1c00249

Royakkers J. ; Guo K. P. ; Toolan D. T. W. ; Feng L. W. ; Minotto A. ; Congrave D. G. ; Danowska M. ; Zeng W. X. ; Bond A. D. ; Al-Hashimi M. ; Marks T. J. ; Facchetti A. ; Cacialli F. ; Bronstein H. Molecular encapsulation of naphthalene diimide (NDI) based π-conjugated polymers: a tool for understanding photoluminescence . Angew. Chim. Int. Ed. , 2021 , 60 ( 47 ), 25005 - 25012 . doi: 10.1002/anie.202110139 http://dx.doi.org/10.1002/anie.202110139

Rui X. T. ; Ota W. ; Sato T. ; Furukori M. ; Nakayama Y. ; Hosokai T. ; Hisamura E. ; Nakamura K. ; Matsuda K. ; Nakao K. ; Monkman A. P. ; Albrecht K. Carbazole-dendronized luminescent radicals . Angew. Chim. Int. Ed. , 2023 , 62 ( 28 ), e 202302550 . doi: 10.1002/anie.202302550 http://dx.doi.org/10.1002/anie.202302550

Hua B. ; Zhou W. ; Yang Z. L. ; Zhang Z. H. ; Shao L. ; Zhu H. M. ; Huang F. H. Supramolecular solid-state microlaser constructed from pillar [5 ] arene-based host-guest complex microcrystals. J. Am. Chem. Soc. , 2018 , 140 ( 46 ), 15651 - 15654 . doi: 10.1021/jacs.8b11156 http://dx.doi.org/10.1021/jacs.8b11156

Kong F. K. ; Tang M. C. ; Wong Y. C. ; Chan M. Y. ; Yam V. W. Design strategy for high-performance dendritic carbazole-containing alkynylplatinum(II) complexes and their application in solution-processable organic light-emitting devices . J. Am. Chem. Soc. , 2016 , 138 ( 19 ), 6281 - 6291 . doi: 10.1021/jacs.6b02632 http://dx.doi.org/10.1021/jacs.6b02632

Han Y. M. ; Bai L. B. ; An X. ; Xu M. ; Wei C. X. ; Lin Z. Q. ; Yu M. N. ; Lin J. Y. ; Sun L. L. ; Sun N. ; Wei C. T. ; Xie L. H. ; Ding X. H. ; Wei Q. ; Yin C. R. ; Li C. H. ; Su W. M. ; Huang W. Intrinsically viscoelastic supramolecular conjugated polymer toward suppressing coffee-ring effect . CCS Chem. , 2022 , 4 ( 11 ), 3529 - 3539 . doi: 10.31635/ccschem.021.202101308 http://dx.doi.org/10.31635/ccschem.021.202101308

Sun C. ; Bai L. B. ; Roldao J. C. ; Burgos-Caminal A. ; Borrell-Grueiro O. ; Lin J. Y. ; Huang W. ; Gierschner J. ; Gawelda W. ; Bañares L. ; Cabanillas-González J. Boosting the stimulated emission properties of host: guest polymer blends by inserting chain twists in the host polymer . Adv. Funct. Mater. , 2022 , 32 ( 48 ), 2206723 . doi: 10.1002/adfm.202270273 http://dx.doi.org/10.1002/adfm.202270273

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