Organic Solar Cells: Efficient Exploration of the Composition Space in Ternary Organic Solar Cells by Combining High‐Throughput Material Libraries and Hyperspectral Imaging (Adv. Energy Mater. 1/2020)

Suppressing Co‐Crystallization of Halogenated Non‐Fullerene Acceptors for Thermally Stable Ternary Solar Cells

“…To determine the likely range of compositions that will display an optimal photovoltaic performance, we used a combinatorial screening method recently described by Harillo-Banos et al for ternary solar cells. [36] In brief, thin layers of the three components (or mixtures thereof) were sequentially deposited on top of each other, resulting in four samples with different lateral composition gradients that when combined covered approximately 65% of the phase space (see Figure S11, Supporting Information, and Experimental Section for details). We then mapped the local Raman intensity, PL, and photocurrent at all compositions covered by the graded samples to obtain maps of these parameters (Figure 6; Figure S12, Supporting Information).…”

“…Photoluminescence, Raman and Photocurrent Phase Diagram: The detailed sample description can be found in ref. [36]. While extracting the current the samples were scanned under a microscope (WITec alpha 300 RA confocal Raman setup).…”

Combinatorial screening of wide band-gap organic solar cell materials with open-circuit voltage between 1.1 and 1.4 V

“…12 The third NFA used here is O-IDFBR, first synthesized by Baran et al in 2017 achieving an efficiency of 11% in a ternary blend with PCE10 and O-IDTBR. 48 To the best of our knowledge, there are very few studies addressing O-IDFBR, 38,40,49 but none exploring the combination of O-IDFBR with the donors selected here.…”

“…For this purpose, our group has developed a platform based on using thickness gradients, generally achieved by blade-coating with variable speed, for the rapid study of important parameters in organic solar cells such as active layer materials, composition, or thickness. 35,38–42…”

“…For this purpose, our group has developed a platform based on using thickness gradients, generally achieved by blade-coating with variable speed, for the rapid study of important parameters in organic solar cells such as active layer materials, composition, or thickness. 35,[38][39][40][41][42] In this study, we used our high throughput screening methodology to explore the binary combinations of three wide E bg donors (PTQ10, PM6, and D18) and three wide E bg acceptors (PMI-FF-PMI, O-IDFBR, and IO-4Cl) shown in Fig. 1a, deposited from solutions using two different solvents (CB and CF).…”