The data set presents the research data for the paper: “Highly efficient fullerene and non-fullerene based ternary organic solar cells incorporating a new tetrathiocin-cored semiconductor” by L. K. Jagadamma, R. G. D. Taylor, Alexander L. Kanibolotsky, Muhammad Tariq Sajjad, Iain A. Wright, Peter N. Horton, Simon J. Coles, Ifor D. W. Samuel* and Peter J. Skabara* in the text and graphic formats. The AFM files in the folder GraphicsToFig7 - Figure 7a PCE10-IDTBR.018, Figure 7b PCE10-IDTBR-EH-5T-TTC.026, Figure 7c CONTROL pce 10 pc71bm.012 and Figure 7d -PCE10-PC71BM- EH-TTC TB.002 - were created by NanoScope 9.0 software. These files can be read by Gwyddion software. The corresponding TIFF files are also presented in the same folder. The NMR data are presented as it was recorded on TopSpin 2.1 software and can be processed on any TopSpin, ACD/Labs or MestReNova software packages.