Decoupling light absorption and charge transport properties in near IR-sensitized Fe2O3 regenerative cells

Mulmudi Hemant Kumar; Nripan Mathews; Pablo P. Boix; Kazuteru Nonomura; Satvasheel Powar; Lam Yeng Ming; Michael Graetzel; Subodh G. Mhaisalkar

doi:10.1039/c3ee42438c

Decoupling light absorption and charge transport properties in near IR-sensitized Fe₂O₃ regenerative cells

Mulmudi Hemant Kumar, Nripan Mathews^*, Pablo P. Boix, Kazuteru Nonomura, Satvasheel Powar, Lam Yeng Ming, Michael Graetzel, Subodh G. Mhaisalkar

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

We report a regenerative iron oxide nanorod solar cell sensitized with squarine (SQ02) dye, which improves the overall light harvesting due to the dye's complementary absorption. The use of illumination sources which enabled selective excitation of Fe₂O₃ and the dye independently allowed the decoupling of transport and light absorption in Fe₂O ₃. From absorbed photon-to-current conversion efficiency (APCE) calculations, it was found out that about 80% (at λ = 680 nm) of the absorbed photons in SQ02 dye are converted to electrons and transported without any further loss into the FTO electrode. Impedance spectroscopy revealed that bulk recombination is still a prominent problem while utilizing hematite as a photoanode in a dye sensitized configuration.

Original language	English
Pages (from-to)	3280-3285
Number of pages	6
Journal	Energy and Environmental Science
Volume	6
Issue number	11
DOIs	https://doi.org/10.1039/c3ee42438c
Publication status	Published - Nov 2013
Externally published	Yes

ASJC Scopus Subject Areas

Environmental Chemistry
Renewable Energy, Sustainability and the Environment
Nuclear Energy and Engineering
Pollution

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1039/c3ee42438c

Cite this

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title = "Decoupling light absorption and charge transport properties in near IR-sensitized Fe2O3 regenerative cells",

abstract = "We report a regenerative iron oxide nanorod solar cell sensitized with squarine (SQ02) dye, which improves the overall light harvesting due to the dye's complementary absorption. The use of illumination sources which enabled selective excitation of Fe2O3 and the dye independently allowed the decoupling of transport and light absorption in Fe2O 3. From absorbed photon-to-current conversion efficiency (APCE) calculations, it was found out that about 80% (at λ = 680 nm) of the absorbed photons in SQ02 dye are converted to electrons and transported without any further loss into the FTO electrode. Impedance spectroscopy revealed that bulk recombination is still a prominent problem while utilizing hematite as a photoanode in a dye sensitized configuration.",

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AU - Kumar, Mulmudi Hemant

AU - Mathews, Nripan

AU - Boix, Pablo P.

AU - Nonomura, Kazuteru

AU - Powar, Satvasheel

AU - Ming, Lam Yeng

AU - Graetzel, Michael

AU - Mhaisalkar, Subodh G.

PY - 2013/11

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AB - We report a regenerative iron oxide nanorod solar cell sensitized with squarine (SQ02) dye, which improves the overall light harvesting due to the dye's complementary absorption. The use of illumination sources which enabled selective excitation of Fe2O3 and the dye independently allowed the decoupling of transport and light absorption in Fe2O 3. From absorbed photon-to-current conversion efficiency (APCE) calculations, it was found out that about 80% (at λ = 680 nm) of the absorbed photons in SQ02 dye are converted to electrons and transported without any further loss into the FTO electrode. Impedance spectroscopy revealed that bulk recombination is still a prominent problem while utilizing hematite as a photoanode in a dye sensitized configuration.

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