On the Influence of Fluorination and Molecular Weight on the ...
Supporting information for
On the Influence of Fluorination and Molecular Weight on the Morphology and Performance of PTB7:PC71BM Solar Cells Xiaoxi He,a Subhrangsu Mukherjee,b Scott Watkins,c Ming Chen,c Tianshi Qing,c Lars Thomsen,d Harald Ade,b Christopher R. McNeille a
Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK b Department of Physics, North Carolina State University, Raleigh, NC 27695, USA c CSIRO Materials Science and Engineering, Private Bag 10, Clayton South MDC, VIC 3169 d Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria, 3169, Australia e Department of Materials Engineering, Monash University, Clayton, Victoria 3800, Australia Email: [email protected]
Figure S1. Plot of photovoltaic parameters vs. specified fluorine content.
Figure S2. Raw XPS data of PTB7-Fx films. (a) Survey scan; (b) High resolution scan of the F 1s peak.
Figure S3. Photovoltaic parameters plotted against measured fluorine content.
Figure S4. Line profiles along qxy, (a), and ~ qz, (b), of the GIWAXS patterns of neat PTB7Fx films.
(a)
(b)
Figure S5. (a) Example NEXAFS spectrum of PTB7-F00 (other PTB7-Fx are similar) and PC71BM demonstrating the nature of the contrast function. (b) Contrast functions for the case of PTB7-F00 and PC71BM with vacuum and between each material calculated from NEXAFS measurement in (a).
Figure S6. 2D R-SoXS scattering patterns of PTB7-Fx:PC71BM blends prepared with DIO acquired at a photon energy of 282.7 eV. Two detector distances are used to achieve the qrange in Fig. 7 with the 2-D data corresponding to “low q” regime shown in figure above.
Figure S7. Plot of (left) median PC71BM domain size and (right) relative purity against real fluorine content in PTB7-Fx:PC71BM blend films (prepared with DIO).
Data Linear Fit
200 180
Long Period (nm)
160 140 120 100 80 60 40 20 20000
40000
60000
80000
100000
120000
Mn
1.1
Data Power Law Fit
Relative Composition Variation
1.0 0.9 0.8 0.7 0.6 0.5 0.4 20000
40000
60000
80000
100000
120000
Mn (g/mol)
Figure S8. Plot long period and relative composition variation vs number molecular weight.
Figure S9. Grain size distribution of PTB7-Fx/PC71BM without DIO.
On the Influence of Fluorination and Molecular Weight on the Morphology and Performance of PTB7:PC71BM Solar Cells Xiaoxi He,a Subhrangsu Mukherjee,b Scott Watkins,c Ming Chen,c Tianshi Qing,c Lars Thomsen,d Harald Ade,b Christopher R. McNeille a
Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK b Department of Physics, North Carolina State University, Raleigh, NC 27695, USA c CSIRO Materials Science and Engineering, Private Bag 10, Clayton South MDC, VIC 3169 d Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria, 3169, Australia e Department of Materials Engineering, Monash University, Clayton, Victoria 3800, Australia Email: [email protected]
Figure S1. Plot of photovoltaic parameters vs. specified fluorine content.
Figure S2. Raw XPS data of PTB7-Fx films. (a) Survey scan; (b) High resolution scan of the F 1s peak.
Figure S3. Photovoltaic parameters plotted against measured fluorine content.
Figure S4. Line profiles along qxy, (a), and ~ qz, (b), of the GIWAXS patterns of neat PTB7Fx films.
(a)
(b)
Figure S5. (a) Example NEXAFS spectrum of PTB7-F00 (other PTB7-Fx are similar) and PC71BM demonstrating the nature of the contrast function. (b) Contrast functions for the case of PTB7-F00 and PC71BM with vacuum and between each material calculated from NEXAFS measurement in (a).
Figure S6. 2D R-SoXS scattering patterns of PTB7-Fx:PC71BM blends prepared with DIO acquired at a photon energy of 282.7 eV. Two detector distances are used to achieve the qrange in Fig. 7 with the 2-D data corresponding to “low q” regime shown in figure above.
Figure S7. Plot of (left) median PC71BM domain size and (right) relative purity against real fluorine content in PTB7-Fx:PC71BM blend films (prepared with DIO).
Data Linear Fit
200 180
Long Period (nm)
160 140 120 100 80 60 40 20 20000
40000
60000
80000
100000
120000
Mn
1.1
Data Power Law Fit
Relative Composition Variation
1.0 0.9 0.8 0.7 0.6 0.5 0.4 20000
40000
60000
80000
100000
120000
Mn (g/mol)
Figure S8. Plot long period and relative composition variation vs number molecular weight.
Figure S9. Grain size distribution of PTB7-Fx/PC71BM without DIO.
