Synthesis of Low-Viscosity Ionic Liquids for Application in Dye-Sensitized Solar Cells

被引：22

作者：

Fang, Yanyan ^{[1
,2
]}

Ma, Pin ^{[1
,2
]}

Cheng, Hongbo ^{[3
,4
,5
]}

Tan, Guoyu ^{[6
]}

Wu, Jiaxin ^{[7
]}

Zheng, Jiaxin ^{[6
]}

Zhou, Xiaowen ^{[1
,2
]}

Fang, Shibi ^{[1
,2
]}

Dai, Yuhua ^{[7
]}

Lin, Yuan ^{[1
,2
,6
]}

机构：

[1] Chinese Acad Sci, CAS Res Educ Ctr Excellence Mol Sci, Beijing Natl Lab Mol Sci, Key Lab Photochem,Inst Chem, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Chinese Acad Sci, CAS Key Lab Biomed Effects Nanomat & Nanosafety, Beijing 100190, Peoples R China

[4] Chinese Acad Sci, Natl Ctr Nanosci & Technol China, Beijing 100190, Peoples R China

[5] Chinese Acad Sci, Inst High Energy Phys, Beijing 100190, Peoples R China

[6] Peking Univ, Shenzhen Grad Sch, Sch Adv Mat, Shenzhen 518055, Peoples R China

[7] Beijing Inst Petrochem Technol, Beijing 102617, Peoples R China

来源：

CHEMISTRY-AN ASIAN JOURNAL | 2019年 / 14卷 / 23期

基金：

中国国家自然科学基金;

关键词：

dye-sensitized solar cell; electrolyte; ionic liquid; viscosity; CONVERSION EFFICIENCY; REDOX ELECTROLYTE; GEL ELECTROLYTES; PERFORMANCE; SEPARATION; SOLVENTS; SALTS;

D O I：

10.1002/asia.201901130

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Two types of ionic liquids (ILs), 1-(3-hexenyl)-3-methyl imidazolium iodide and 1-(3-butenyl)-3-methyl imidazolium iodide, are synthesized by introducing an unsaturated bond into the side alkyl chain of the imidazolium cation. These new ionic liquids exhibit high thermal stability and low viscosity (104 cP and 80 cP, respectively). The molecular dynamics simulation shows that the double bond introduced in the alkane chain greatly changes the molecular system space arrangement and diminishes the packing efficiency, leading to low viscosity. The low viscosity of the synthesized ionic liquids would enhance the diffusion of redox couples. This enhancement is detected by fabricating dye-sensitized solar cells (DSSCs) with electrolytes containing the two ILs and I-2. The highest efficiency of DSSCs is 6.85 % for 1-(3-hexenyl)-3-methyl imidazolium iodide and 5.93 % for 1-(3-butenyl)-3-methyl imidazolium iodide electrolyte, which is much higher than that of 5.17 % with the counterpart 1-hexyl-3-methyl imidazolium iodide electrolyte.

引用

页码：4201 / 4206

页数：6

共 55 条

[41] Charge separation and efficient light energy conversion in sensitized mesoscopic solar cells based on binary ionic liquids [J].