Although the triiodide/iodide redox couple works efficiently in dye-sensitized solar cells it restricts functionality by absorbing visible light. Now, a disulfide/thiolate redox couple that has negligible absorption in the visible spectral range is presented, which in conjunction with a sensitized heterojunction, displays an efficiency of 6.4% under standard illumination test conditions.
- Mingkui Wang
- Nathalie Chamberland
- Michael Grätzel
