应用化学2024，Vol.41Issue(11)：1572-1584,13.DOI:10.19894/j.issn.1000-0518.240115
2种具有吸光特性的有机小分子空穴传输材料的合成及其光伏应用
Synthesis and Photovoltaic Application of Two Organic Small Molecules as Hole Transport Materials with Light-Absorbing Properties
摘要
Abstract
Electron donors with light absorption ability are important components in organic/inorganic hybrid solar cells.Organic small molecule hole transport materials are gradually becoming a research hotspot in the field of optoelectronics due to their advantages of clear chemical structure,adjustable structure and energy level,as well as simple synthesis and easy purification properties.In this work,two kinds of organic small molecule hole transport materials Hl and H3 were designed and synthesized with benzothiadizole as electron acceptor,conjugated π bridge of different lengths and substituted triphenylamine group as electron donor.The spatial configuration and electron cloud distribution were studied by density functional theory,the photophysical and electrochemical properties were characterized,and they were applied as electron donors in hybrid solar cells to study their photovoltaic characteristics.The experimental results showed that there are obvious intramolecular charge transfer phenomena in both molecules,which confirmed their D-A-D linear configuration.Both materials have a wide and strong optical response in the UV-visible region,and high hole mobility and conductivity.The energy levels of the molecules are in a suitable position to achieve efficient charge transfer between materials in hybrid solar cells.The photoelectric conversion efficiency(PCE)of hybrid solar cells based on H1 and H3 were 5.60％and 3.89％,respectively.Among them,H1 molecule has the highest hole mobility and conductivity values,and could form better heterojunction with TiO2 layer,so the charge recombination of the corresponding cell device was significantly reduced,and the cell efficiency was better than the commonly used conjugated polymer hole transport material P3HT(PCE:5.19％).关键词
杂化太阳能电池/空穴传输材料/给体-受体-给体/空穴迁移率/电荷复合/光电转换效率Key words
Hybrid solar cells/Hole transport materials/Donor-Acceptor-Donor/Hole mobility/Charge recombination/Photoelectric conversion efficiency分类
化学化工引用本文复制引用
裴娟,王馨卉,吕海军,王婷婷..2种具有吸光特性的有机小分子空穴传输材料的合成及其光伏应用[J].应用化学,2024,41(11):1572-1584,13.基金项目
国家自然科学基金(No.21603053)和河北省自然科学基金(Nos.B2014208066,B2022208001)资助 Supported by the National Natural Science Foundation of China(No.21603053)and the Natural Science Foundation of Hebei Province,China(Nos.B2014208066,B2022208001) （No.21603053）
