Abstract
Poly(vinylcarbazole) (PVCz) dispersed the typical fullerene derivative, PCBM, well in its solution, which was then coated onto a mesoporous titanium oxide (TiO 2 ) 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 TiO 2 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 TiO 2 and perovskite interface.
| Original language | English |
|---|---|
| Pages (from-to) | 2848-2853 |
| Number of pages | 6 |
| Journal | ACS Applied Energy Materials |
| Volume | 2 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2019 Apr 22 |
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Keywords
- charge transport
- interface passivation
- perovskite
- photoenergy conversion
- poly(vinylcarbazole)
- solar cell
ASJC Scopus subject areas
- Energy Engineering and Power Technology
- Chemical Engineering (miscellaneous)
- Electrochemistry
- Materials Chemistry
- Electrical and Electronic Engineering
Cite this
Perovskite/TiO 2 Interface Passivation Using Poly(vinylcarbazole) and Fullerene for the Photovoltaic Conversion Efficiency of 21% . / Okada, Wataru; Suga, Takeo; Oyaizu, Kenichi; Segawa, Hiroshi; Nishide, Hiroyuki.
In: ACS Applied Energy Materials, Vol. 2, No. 4, 22.04.2019, p. 2848-2853.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Perovskite/TiO 2 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
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 (TiO 2 ) 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 TiO 2 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 TiO 2 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 (TiO 2 ) 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 TiO 2 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 TiO 2 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
VL - 2
SP - 2848
EP - 2853
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
SN - 2574-0962
IS - 4
ER -