Performance enhancement for high performance dye-sensitized solar cells via using pyridinyl-functionalized ionic liquid type additive

- Pyridinyl-functionalized ionic liquid additive ([BuPyIm]Br) is synthesized.
- [BuPyIm]Br shows low volatility and high thermal stability.
- [BuPyIm]Br-based cell exhibits an efficiency of 6.69% and good long-term stability.
- [BuPyIm]Br as additive avoids the negative features arising from volatile additives.