Control of Charge Dynamics through a Charge-Separation Interface for All-Solid Perovskite-Sensitized Solar Cells

The relationship between the structure of the charge‐separation interface and the photovoltaic performance of all‐solid dye‐sensitized solar cells is reported. This cell is composed of porous a TiO2/perovskite (CH3NH3PbIxCl3−x)/p‐type organic conductor. The porous titania layer was passivated with A...

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Veröffentlicht in:Chemphyschem 2014-04, Vol.15 (6), p.1062-1069
Hauptverfasser: Ogomi, Yuhei, Kukihara, Kenji, Qing, Shen, Toyoda, Taro, Yoshino, Kenji, Pandey, Shyam, Momose, Hisayo, Hayase, Shuzi
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container_end_page 1069
container_issue 6
container_start_page 1062
container_title Chemphyschem
container_volume 15
creator Ogomi, Yuhei
Kukihara, Kenji
Qing, Shen
Toyoda, Taro
Yoshino, Kenji
Pandey, Shyam
Momose, Hisayo
Hayase, Shuzi
description The relationship between the structure of the charge‐separation interface and the photovoltaic performance of all‐solid dye‐sensitized solar cells is reported. This cell is composed of porous a TiO2/perovskite (CH3NH3PbIxCl3−x)/p‐type organic conductor. The porous titania layer was passivated with Al2O3 or Y2O3 to remove surface traps of the porous titania layer. Both passivations were effective in increasing the efficiency of the solar cell. Especially, the effect of Y2O3 passivation was remarkable. After passivation, the efficiency increased from 6.59 to 7.5 %. The increase in the efficiency was discussed in terms of the electron lifetime in TiO2, the thermally stimulated current, the measurement of the microwave refractive carrier lifetime, and transition absorption spectroscopy. It was proven that surface passivation resulted in retardation of charge recombination between the electrons in the porous titania layers and the holes in the p‐type organic conductors. Dye cell, dye! Carrier dynamics of perovskite sensitized solar cells with and without Y2O3 layer are reported.
doi_str_mv 10.1002/cphc.201301153
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source Wiley Online Library Journals Frontfile Complete
subjects Applied sciences
Chemistry
dye-sensitized solar cells
Efficiency
electron lifetimes
Energy
energy conversion
Exact sciences and technology
General and physical chemistry
Natural energy
Photovoltaic cells
Photovoltaic conversion
sensitizers
Solar cells. Photoelectrochemical cells
Solar energy
surface passivation
Surface physical chemistry
title Control of Charge Dynamics through a Charge-Separation Interface for All-Solid Perovskite-Sensitized Solar Cells
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