Novel Nonconjugated Polymer as Cathode Buffer Layer for Efficient Organic Solar Cells

被引:21
作者
Cai, Yunhao [1 ]
Chang, Li [3 ,4 ]
You, Longzhen [1 ]
Fan, BingBing [1 ]
Liu, Hongliang [2 ]
Sun, Yanming [1 ]
机构
[1] Beihang Univ, Sch Chem, Beijing 100191, Peoples R China
[2] Chinese Acad Sci, Tech Inst Phys & Chem, Lab Bioinspired Smart Interface Sci, Beijing 100190, Peoples R China
[3] Lanzhou Univ, State Key Lab Appl Organ Chem, Key Lab Nonferrous Met Chem & Resources Utilizat, Lanzhou 730000, Peoples R China
[4] Lanzhou Univ, Dept Chem, Lanzhou 730000, Peoples R China
基金
对外科技合作项目(国际科技项目);
关键词
organic solar cells; cathode buffer layer; nonconjugated polymer; efficiency; stability; ELECTRON-TRANSPORT LAYER; CONJUGATED POLYELECTROLYTE; HIGHLY EFFICIENT; INTERLAYER; PERFORMANCE;
D O I
10.1021/acsami.8b07691
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
A novel nonconjugated polymer named poly-(2-acrylamido-2-methyl-1-propanesulfonic acid sodium salt) (PAMPS-Na) was designed and synthesized. The PAMPS-Na has good solubility in polar solvents, such as water, methanol, and ethanol, which can be used as the cathode buffer layer in organic solar cells (OSCs) through solution processing without damaging the underlying active layer. Moreover, it was found that PAMPS-Na can significantly decrease the Al work function when it was modified with Al. To reveal its universal application in organic photovoltaic devices, a variety of photovoltaic donor materials, including two medium-band gap polymers, a wide-band gap polymer, and a small molecule donor were employed to fabricate OSCs. Compared with OSCs with Ca/Al electrode, the devices based on PAMPS-Na/Al exhibited higher photovoltaic performance, mainly because of the increased short-circuit current. Additionally, OSCs with PAMPS-Na/Al displayed better ambient stability than devices with Ca/Al. It is also interesting to find that the performance of the devices can tolerate a wide change of PAMPS-Na's thickness, enabling the potential for large-scale fabrication of OSCs. The results suggest that PAMPS-Na is a promising candidate as the cathode buffer layer to improve the efficiency and stability of OSCs.
引用
收藏
页码:24082 / 24089
页数:8
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