TY - JOUR
T1 - Raman study of the interaction between regioregular poly(3-hexylthiophene) (P3HT) and transition-metal oxides MoO3, V2O5, and WO3 in polymer solar cells
AU - Yamamoto, Jun
AU - Furukawa, Yukio
PY - 2016/1/16
Y1 - 2016/1/16
N2 - We measured the Raman spectra of indium-tin oxide (ITO)/poly(3-hexylthiophene) (P3HT)/metal oxide (MoO3, V2O5, or WO3) samples as an anode buffer layer. The difference Raman spectrum between ITO/P3HT/MoO3 and ITO/P3HT was similar to that of positive polarons generated by FeCl3 doping, which indicated that positive polarons were formed upon MoO3 deposition. MoO3 functioned as an oxidizing dopant. Positive polarons were also formed upon V2O5 and WO3 deposition. The polaron electronic energy levels formed near the Fermi level of an ITO, Ag, or Au electrode are associated with an improvement of charge transport through the interface.
AB - We measured the Raman spectra of indium-tin oxide (ITO)/poly(3-hexylthiophene) (P3HT)/metal oxide (MoO3, V2O5, or WO3) samples as an anode buffer layer. The difference Raman spectrum between ITO/P3HT/MoO3 and ITO/P3HT was similar to that of positive polarons generated by FeCl3 doping, which indicated that positive polarons were formed upon MoO3 deposition. MoO3 functioned as an oxidizing dopant. Positive polarons were also formed upon V2O5 and WO3 deposition. The polaron electronic energy levels formed near the Fermi level of an ITO, Ag, or Au electrode are associated with an improvement of charge transport through the interface.
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U2 - 10.1016/j.cplett.2015.12.012
DO - 10.1016/j.cplett.2015.12.012
M3 - Article
AN - SCOPUS:84951311154
SN - 0009-2614
VL - 644
SP - 267
EP - 270
JO - Chemical Physics Letters
JF - Chemical Physics Letters
ER -