TY - JOUR
T1 - Solution-Processed p-Dopant as Interlayer in Polymer Solar Cells
AU - Guillain, F.
AU - Endres, J.
AU - Bourgeois, L.
AU - Kahn, Antoine
AU - Vignau, L.
AU - Wantz, G.
N1 - Funding Information:
This work was financially supported by the Région Aquitaine and Bordeaux INP. This work was also supported by a public grant overseen by the French National Research Agency (ANR) as part of the "Investissements d'avenir" program (reference ANR-10-EQPX-28-01/Equipex ELORPrintTec). The collaboration with Princeton was supported by the LabEx AMADEus (ANR-10-LABX-42) in the framework of IdEx Bordeaux (ANR-10-IDEX-03-02), that is, the Investisse Investissements d'Avenir program of the French government managed by the Agence Nationale de la Recherche. Work in Princeton was supported by a grant from the National Science Foundation (DMR-1506097).
Publisher Copyright:
© 2016 American Chemical Society.
PY - 2016/4/27
Y1 - 2016/4/27
N2 - We report here an original approach to dope the semiconducting polymer-metal interface in an inverted bulk-heterojunction (BHJ) organic solar cell. Solution-processed 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ), is deposited on top of a P3HT:PC61BM layer before deposition of the top electrode. Doping of P3HT by F4-TCNQ occurs after thermally induced diffusion at 100 °C of the latter into the BHJ. Diffusion and doping are evidenced by XPS and UV-vis-NIR absorption. XPS highlights the decrease in Fluorine concentration on top of the BHJ after annealing. In the same time, a charge transfer band attributed to doping is observed in the UV-vis-NIR absorption spectrum. Inverted polymer solar cells using solution-processed F4-TCNQ exhibit power conversion efficiency of nearly 3.5% after annealing. This simple and efficient approach, together with the low annealing temperature required to allow diffusion and doping, leads to standard efficiency P3HT:PC61BM polymer solar cells, which are suitable for printing on plastic flexible substrate.
AB - We report here an original approach to dope the semiconducting polymer-metal interface in an inverted bulk-heterojunction (BHJ) organic solar cell. Solution-processed 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ), is deposited on top of a P3HT:PC61BM layer before deposition of the top electrode. Doping of P3HT by F4-TCNQ occurs after thermally induced diffusion at 100 °C of the latter into the BHJ. Diffusion and doping are evidenced by XPS and UV-vis-NIR absorption. XPS highlights the decrease in Fluorine concentration on top of the BHJ after annealing. In the same time, a charge transfer band attributed to doping is observed in the UV-vis-NIR absorption spectrum. Inverted polymer solar cells using solution-processed F4-TCNQ exhibit power conversion efficiency of nearly 3.5% after annealing. This simple and efficient approach, together with the low annealing temperature required to allow diffusion and doping, leads to standard efficiency P3HT:PC61BM polymer solar cells, which are suitable for printing on plastic flexible substrate.
KW - F-TCNQ
KW - doping
KW - hole transport layer
KW - polymer solar cells
KW - solution-processing
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U2 - 10.1021/acsami.6b00356
DO - 10.1021/acsami.6b00356
M3 - Article
C2 - 26958706
AN - SCOPUS:84964861493
SN - 1944-8244
VL - 8
SP - 9262
EP - 9267
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 14
ER -