基于苯并二噻吩的萘甲酰亚胺界面材料的合成及光伏性能研究

胡锦祺; 姜基磊; 代水星; 刘昊; 崔伦秀; 宋蕙馨; 江河清; 黄明华

doi:10.11777/j.issn1000-3304.2025.25063

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基于苯并二噻吩的萘甲酰亚胺界面材料的合成及光伏性能研究

研究论文 | 更新时间：2025-06-12

- 基于苯并二噻吩的萘甲酰亚胺界面材料的合成及光伏性能研究
- Benzodithiophene-functionalized Naphthalimide Cathode Interlayers for Organic Solar Cell
- 高分子学报 2025年页码：1-10
- 作者机构：
  
  1.中国海洋大学材料科学与工程学院青岛 266100
  2.中国科学院青岛生物能源与过程研究所青岛 266101
- 作者简介：
  
  E-mail: sxdai@pku.edu.cn, daishuixing@ouc.edu.cn
  jianghq@qibebt.ac.cn
  huangminghua@ouc.edu.cn
- 基金信息：
  
  山东省自然科学基金青年面上项目(基金号 ZR2024QB022);太阳能光电转换与利用全国重点实验室(基金号 SKLPCU24OP010)
- DOI：10.11777/j.issn1000-3304.2025.25063
  中图分类号：
- CSTR：32057.14.GFZXB.2025.7423
- 收稿日期：2025-03-05，
  
  录用日期：2025-05-23，
  
  网络出版日期：2025-06-12，
- 稿件说明：
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胡锦祺, 姜基磊, 代水星, 刘昊, 崔伦秀, 宋蕙馨, 江河清, 黄明华. 基于苯并二噻吩的萘甲酰亚胺界面材料的合成及光伏性能研究. 高分子学报, doi: 10.11777/j.issn1000-3304.2025.25063

Hu, J. Q.; Jiang, J. L.; Dai,S. X.; Liu, H.; Cui, L. X.; Song, H. X.; Jiang, H. Q.; Huang, M. H. Benzodithiophene-functionalized naphthalimide cathode interlayers for organic solar cell. Acta Polymerica Sinica, doi: 10.11777/j.issn1000-3304.2025.25063
胡锦祺, 姜基磊, 代水星, 刘昊, 崔伦秀, 宋蕙馨, 江河清, 黄明华. 基于苯并二噻吩的萘甲酰亚胺界面材料的合成及光伏性能研究. 高分子学报, doi: 10.11777/j.issn1000-3304.2025.25063 DOI： CSTR： 32057.14.GFZXB.2025.7423.

Hu, J. Q.; Jiang, J. L.; Dai,S. X.; Liu, H.; Cui, L. X.; Song, H. X.; Jiang, H. Q.; Huang, M. H. Benzodithiophene-functionalized naphthalimide cathode interlayers for organic solar cell. Acta Polymerica Sinica, doi: 10.11777/j.issn1000-3304.2025.25063 DOI： CSTR： 32057.14.GFZXB.2025.7423.

摘要

高效且稳定的阴极界面层对于提高有机太阳能电池(OSCs)的性能起着至关重要的作用.萘甲酰亚胺分子因其化学结构简单且易于修饰而被用作OSCs阴极界面材料. 由此，本研究设计合成了一种基于苯并二噻吩的萘甲酰亚胺新型共轭小分子NBDT-M，即6'-(4

8-双(5-(2-乙基己基)噻吩-2-基)苯并[1

2-b:4

5-b']二噻吩-2

6-二基)双(2-(3-(1H-咪唑-1-基)丙基)-1H-苯并异喹啉-1

3(2H)-二酮). 与2

9-双(3-(1H-咪唑-1-基)丙基)蒽[2

9-def:6

10-d'e'f']二异喹啉-1

10(2H

9H)-四酮(PDI-M)相比，NBDT-M具有优异的醇溶液加工性能，高的最低未占有轨道(LUMO)能级，宽的光学带隙以及低的表面粗糙度. 最终，以NBDT-M为阴极界面层的OSCs获得了18.3%的能量转换效率，高于PDI-M的16.5%.

Abstract

The efficient and stable cathode interface layer plays a vital role in improving the performances of organic solar cells (OSCs). It not only facilitates efficient charge extraction and transport but also suppresses non-radiative recombination at the interface. Recently

naphthalimide has been used as a cathode interface material of OSCs because of its simple molecular

structure and easy modification

which enables convenient synthesis and tunability of properties through chemical adjustments. Therefore

in this paper

a naphthalimide-based conjugated molecule incorporating a benzo[1

]

dithiophene unit was designed and synthesized

namely

6'-(4

bis

(5-(2-ethylhexyl)thiophen-2-yl)benzo[1

‍2-

:‍4

‍5-

]

dithiophene-2

‍6-diyl)

bis

(2-‍(3-‍(1H-imidazole-1-yl)propyl)‍-1H-benzo[de

]

isoquinoline-1

3(2H)-dione) (NBDT-M). The introduction of the benzo[1

:‍4

‍5-

]

dithiophene unit was intended to optimize the electronic structure and molecular packing. NBDT-M exhibits excellent film-forming ability

which is crucial for device fabrication. It also shows high thermal stability

ensuring the device remains stable during operation. The up-shifted lowest unoccupied molecular orbital (LUMO) energy level is beneficial for better energy-level alignment with the active layer. The large optical energy band gap reduces optical absorption losses

and the low surface roughness minimizes interface defects. Finally

NBDT-M modified OSCs yield a power conversion efficiency (PCE) of up to 18.3%

significantly higher than that of the PDI-M based device (16.5%).

关键词

Keywords

references

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