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

孙宁; 高强; 郑东阳; 孙丽燕; 白鲁冰; 林进义; 韩亚敏

doi:10.11777/j.issn1000-3304.2026.26092

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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

研究论文 | 更新时间：2026-07-10

- 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
- Steric-hindrance Encapsulation for Stable Deep-blue Polyfluorene Semiconductors and Improved Optoelectronic Properties
- 高分子学报 2026年页码：1-12
- 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：
  
  E-mail: iamymhan@njtech.edu.cn
- 基金信息：
  
  国家自然科学基金(基金号 ┣62105262;62205141);20230119┫
- DOI：10.11777/j.issn1000-3304.2026.26092
  中图分类号：
- CSTR：32057.14.GFZXB.2026.7639
- 收稿：2026-03-26，
  
  录用：2026-05-26，
  
  网络首发：2026-07-10，
- 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.

关键词

Keywords

references

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