期刊
APPLIED SURFACE SCIENCE ADVANCES
卷 5, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsadv.2021.100120
关键词
I-2-free polymer electrolytes; Visible light absorption; TiO2 nanotubes; Electron lifetime
类别
资金
- centre of Excellence of Multifunctional Architectured Materials CEMAM [AN-10-LABX-44-01]
- ARC 4 Energies-Region Rhone-Alpes
- IDS FunMAT-International Doctorate School in Functional Materials
The novel iodine-free polymer electrolyte used in flexible solid-state dye-sensitized solar cells demonstrates higher efficiency and stability due to improved V-oc and J(sc), reduced light absorption loss and charge recombination, and increased electron lifetime in the cells.
For practical applications, flexible solid-state dye-sensitized solar cells (ss-DSSCs) with high photovoltaic performance and stability are paramount. A novel iodine (I-2)-free polysiloxane based highly conductive poly(ionic liquid), which acts as the lone charge transfer intermediate, is used for the first time as an electrolyte in flexible 1D TiO2 nanotube photoanodes (TiO2 NT) based ss-DSSCs. The I-2-free polymer electrolyte plasticized with ethylene carbonate (EC) leads to a higher power conversion efficiency in DSSCs involving TiO2 NTs than the I-2-based polymer electrolyte, mainly due to improved V-oc and J(sc). Apart from overcoming the visible light absorption loss, this I-2-free polymer electrolyte also reduces the charge recombination and thus leads to higher electron lifetime in DSSCs. The I-2-free DSSCs also displayed long-term stability measured under ambient and accelerated stability testing. The improvement is also due to the effective pore infiltration into the large pores of TiO2 NT structure in ss-DSSCs.
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