TY - JOUR
T1 - Perovskite/TiO2 Interface Passivation Using Poly(vinylcarbazole) and Fullerene for the Photovoltaic Conversion Efficiency of 21%
AU - Okada, Wataru
AU - Suga, Takeo
AU - Oyaizu, Kenichi
AU - Segawa, Hiroshi
AU - Nishide, Hiroyuki
N1 - Funding Information:
This work was partially supported by “Research and Development of Innovative New Structure Solar Cells” from NEDO, Japan.
Publisher Copyright:
© 2019 American Chemical Society.
PY - 2019/4/22
Y1 - 2019/4/22
N2 - Poly(vinylcarbazole) (PVCz) dispersed the typical fullerene derivative, PCBM, well in its solution, which was then coated onto a mesoporous titanium oxide (TiO2) layer. PVCz served as a scaffold to fix PCBM homogeneously and to prevent its elution out upon the following perovskite layer formation. A series of perovskite cells were fabricated upon the PVCz/PCBM-modified TiO2 layer. Many of the cells were characterized by a photovoltaic conversion efficiency of >20%, and the top cells had an efficiency of 21.1% (with an average of 21.0%). Fluorescence decay from the perovskite layer of the cell was unchanged with the PVCz/PCBM modification, suggesting an efficient charge transport to the electron-transporting layers. On the other hand, the PVCz/PCBM modification or passivation significantly reduced electroluminescence intensity under an inverse bias application, supporting an efficient suppression of carrier recombination at the TiO2 and perovskite interface.
AB - Poly(vinylcarbazole) (PVCz) dispersed the typical fullerene derivative, PCBM, well in its solution, which was then coated onto a mesoporous titanium oxide (TiO2) layer. PVCz served as a scaffold to fix PCBM homogeneously and to prevent its elution out upon the following perovskite layer formation. A series of perovskite cells were fabricated upon the PVCz/PCBM-modified TiO2 layer. Many of the cells were characterized by a photovoltaic conversion efficiency of >20%, and the top cells had an efficiency of 21.1% (with an average of 21.0%). Fluorescence decay from the perovskite layer of the cell was unchanged with the PVCz/PCBM modification, suggesting an efficient charge transport to the electron-transporting layers. On the other hand, the PVCz/PCBM modification or passivation significantly reduced electroluminescence intensity under an inverse bias application, supporting an efficient suppression of carrier recombination at the TiO2 and perovskite interface.
KW - charge transport
KW - interface passivation
KW - perovskite
KW - photoenergy conversion
KW - poly(vinylcarbazole)
KW - solar cell
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U2 - 10.1021/acsaem.9b00162
DO - 10.1021/acsaem.9b00162
M3 - Article
AN - SCOPUS:85064846823
SN - 2574-0962
VL - 2
SP - 2848
EP - 2853
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
IS - 4
ER -
