摘要
有机太阳能电池具有低成本、轻量化、柔性化等优点,是未来对太阳能合理有效利用的最佳方式之一。空穴传输层作为有机太阳能电池的关键组成部分,具有调节OSCs活性层与电极间的能级势垒、提高空穴载流子的收集与传输、OSCs的稳定性与光伏转换效率的作用。聚3,4-乙烯二氧噻吩/聚苯乙烯磺酸盐(PEDOT∶PSS)是目前广泛使用的有机太阳能电池空穴传输层材料,具有可溶液加工、高透光性、能级匹配等突出优点,但同时也存在电导率低、腐蚀电极、水/氧敏感等缺陷。目前针对PEDOT∶PSS缺陷的改性方法主要有通过使用有机溶剂或酸处理,减弱PEDOT与PSS间的相互作用,促进PEDOT与PSS相分离提高电导率,以及掺杂高导性材料、离子液体和盐等方式提高PEDOT∶PSS的介电常数;引入交联剂等方式提高PEDOT∶PSS的疏水性,降低吸水性倾向;PEDOT∶PSS显酸性,而在PEDOT∶PSS与电极间插入修饰层,可避免PEDOT∶PSS与电极直接接触引起电极的腐蚀。本文综述了近年来改善PEDOT∶PSS电导率、酸性以及水和空气敏感性的各种方法:掺杂、复合及补充修饰层等后处理方法。目前改性方法虽然可以克服PEDOT∶PSS存在的某一缺陷,但不同后处理工艺差别巨大,工艺通用性受到限制。同时,本文还讨论了改性PEDOT∶PSS与电池性能之间的关系,阐述了PEDOT∶PSS的改性原则;提出在制备阶段调控PEDOT与PSS的相分离的前处理方法且该方法可以改善PEDOT∶PSS膜的形貌与均匀性,亦可弥补目前的后处理方法的不足,以及改变PEDOT链的构象,来克服PEDOT∶PSS低电导率、水和空气敏感、腐蚀电极等缺陷,促进基于PEDOT∶PSS有机太阳能电池大面积生产工艺的产业化。
Organic solar cells are one of the best ways to use solar energy reasonably and efficiently in the future owing to their advantages of low cost,light weight and flexibility etc.The hole transport layer can improve the collection and transport of hole carriers,adjust the energy barrier between the active layer and the electrode,and block electrons to reduce charge recombination,which is a key component of the organic solar cells.The poly(3,4-ethylene dioxythiophene):poly(styrenesulfonate)(PEDOT∶PSS)is widely used organic solar cell hole transport layer materials at present,which has the outstanding advantages of solution processing,high transparency and suitable work function.However,PEDOT∶PSS also has some defects,such as low conductivity,strong acid and sensitive to water and air.The modifications of organic solvents,acids,ionic liquids,and salts,which can reduce the interaction between PEDOT and PSS,and promote the phase separation of PEDOT and PSS.Crosslinking agent was introduce to reduce the water absorption of PEDOT∶PSS,the modified layer introducd between PEDOT∶PSS and the electrode was to avoid corroding the electrode.In this paper,the modifications of improving conductivity,acidity and sensitivity to water and air for PEDOT∶PSS in recent years are reviewed,such as doping,compounding and supplementary modification of post-treatment methodsetc.Although post-treatment methods can overcome a certain defect of PEDOT∶PSS,there are great differences among different post-treatment processes,and the process universality is limited.The relationship between modified PEDOT∶PSS and battery performance is discussed,and the modification principle of PEDOT∶PSS is expounded.We propose to regulate the phase separation of PEDOT and PSS during pretreatment methods improving morphology and uniformity of the PEDOT∶PSS film,and can avoid the shortcomings of current post-processing methods,as well as the change of PEDOT chain conformation method to overcome the PEDOT∶PSS low electrical conductivity,corrosion
作者
张意晨
徐海涛
赵春辉
ZHANG Yichen;XU Haitao;ZHAO Chunhui(College of Materials and Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2021年第3期3204-3208,共5页
Materials Reports
基金
国家自然科学基金(21965022)。
