Figure 1.1 The 3J device chosen in TRIUMPH, for high-PCE and low-
cost TW-scale terrestrial PV deployment, and the key objectives.
ETL/HTL: electron/hole transport layer. RJ: recombination junction
and TCO: transparent conductive oxide.
This project has received funding from the European Union’s Horizon research and innovation programme
under grant agreement No 101075725. Funded by the European Union. Views and opinions expressed are
however those of the author(s) only and do not necessarily reflect those of the European Union. Neither the
European Union nor the granting authority can be held responsible for them.