Fig. 4. Raman spectra of CuII/I(tmby)2 TFSI(2) and MgTFSI2 (powders), DSCs sensitized with the XY1:L1 sensitizer combination as well as (sensitized) DSCs containing amorphous CuII/I(tmby)2 TFSI(2) hole transport material. The two latter spectra were recorded inside the ‘sandwich’ DSC. Spectra are offset for clarity.
