The electronic role of the TiO2 light-scattering layer in dye-sensitized solar cells

Zhipan Zhang; Seigo Ito; Brian O'Regan; Daibin Kuang; Shaik Mohammed Zakeeruddin; Paul Liska; Raphaël Charvet; Pascal Comte; Mohammad Khaja Nazeeruddin; Peter Péchy; Robin Humphry-Baker; Tsuguo Koyanagi; Takaki Mizuno; Michael Grätzel

doi:10.1524/zpch.2007.221.3.319

The electronic role of the TiO₂ light-scattering layer in dye-sensitized solar cells

Zhipan Zhang, Seigo Ito, Brian O'Regan, Daibin Kuang, Shaik Mohammed Zakeeruddin, Paul Liska, Raphaël Charvet, Pascal Comte, Mohammad Khaja Nazeeruddin, Peter Péchy, Robin Humphry-Baker, Tsuguo Koyanagi, Takaki Mizuno, Michael Grätzel^*

^*Corresponding author for this work

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

49 Citations (Scopus)

Abstract

Dye-sensitized solar cells have been fabricated with different kinds of TiO₂ films including SiO₂ coated and bare TiO₂ microparticles as light-scattering layer (LSL). Results show that the LSL barely affects the cell's dark current, whereas under illumination, it made a significant contribution to the total photocurrent. Photo-voltage decay measurements performed under bias illumination show the density of electronic states (DOS) of the LSL to be two times smaller than that of a transparent nanoparticle layer (TNL). Strikingly, DSCs fabricated from a 4.5 μm thick LSL alone showed a conversion efficiency of 5% despite of being pale pink in color. This impressive performance is attributed to light containment in the LSL and a low density of defect electronic states.

Original language	English
Pages (from-to)	319-328
Number of pages	10
Journal	Zeitschrift fur Physikalische Chemie
Volume	221
Issue number	3
DOIs	https://doi.org/10.1524/zpch.2007.221.3.319
Publication status	Published - 2007
Externally published	Yes

Keywords

Dye sensitizer solar cells
Light containment
Scattering layer
Solar-energy conversion

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10.1524/zpch.2007.221.3.319

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Zhang, Z., Ito, S., O'Regan, B., Kuang, D., Zakeeruddin, S. M., Liska, P., Charvet, R., Comte, P., Nazeeruddin, M. K., Péchy, P., Humphry-Baker, R., Koyanagi, T., Mizuno, T., & Grätzel, M. (2007). The electronic role of the TiO₂ light-scattering layer in dye-sensitized solar cells. Zeitschrift fur Physikalische Chemie, 221(3), 319-328. https://doi.org/10.1524/zpch.2007.221.3.319

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title = "The electronic role of the TiO2 light-scattering layer in dye-sensitized solar cells",

abstract = "Dye-sensitized solar cells have been fabricated with different kinds of TiO2 films including SiO2 coated and bare TiO2 microparticles as light-scattering layer (LSL). Results show that the LSL barely affects the cell's dark current, whereas under illumination, it made a significant contribution to the total photocurrent. Photo-voltage decay measurements performed under bias illumination show the density of electronic states (DOS) of the LSL to be two times smaller than that of a transparent nanoparticle layer (TNL). Strikingly, DSCs fabricated from a 4.5 μm thick LSL alone showed a conversion efficiency of 5% despite of being pale pink in color. This impressive performance is attributed to light containment in the LSL and a low density of defect electronic states.",

keywords = "Dye sensitizer solar cells, Light containment, Scattering layer, Solar-energy conversion",

author = "Zhipan Zhang and Seigo Ito and Brian O'Regan and Daibin Kuang and Zakeeruddin, {Shaik Mohammed} and Paul Liska and Rapha{\"e}l Charvet and Pascal Comte and Nazeeruddin, {Mohammad Khaja} and Peter P{\'e}chy and Robin Humphry-Baker and Tsuguo Koyanagi and Takaki Mizuno and Michael Gr{\"a}tzel",

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doi = "10.1524/zpch.2007.221.3.319",

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Zhang, Z, Ito, S, O'Regan, B, Kuang, D, Zakeeruddin, SM, Liska, P, Charvet, R, Comte, P, Nazeeruddin, MK, Péchy, P, Humphry-Baker, R, Koyanagi, T, Mizuno, T & Grätzel, M 2007, 'The electronic role of the TiO₂ light-scattering layer in dye-sensitized solar cells', Zeitschrift fur Physikalische Chemie, vol. 221, no. 3, pp. 319-328. https://doi.org/10.1524/zpch.2007.221.3.319

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T1 - The electronic role of the TiO2 light-scattering layer in dye-sensitized solar cells

AU - Zhang, Zhipan

AU - Ito, Seigo

AU - O'Regan, Brian

AU - Kuang, Daibin

AU - Zakeeruddin, Shaik Mohammed

AU - Liska, Paul

AU - Charvet, Raphaël

AU - Comte, Pascal

AU - Nazeeruddin, Mohammad Khaja

AU - Péchy, Peter

AU - Humphry-Baker, Robin

AU - Koyanagi, Tsuguo

AU - Mizuno, Takaki

AU - Grätzel, Michael

PY - 2007

Y1 - 2007

N2 - Dye-sensitized solar cells have been fabricated with different kinds of TiO2 films including SiO2 coated and bare TiO2 microparticles as light-scattering layer (LSL). Results show that the LSL barely affects the cell's dark current, whereas under illumination, it made a significant contribution to the total photocurrent. Photo-voltage decay measurements performed under bias illumination show the density of electronic states (DOS) of the LSL to be two times smaller than that of a transparent nanoparticle layer (TNL). Strikingly, DSCs fabricated from a 4.5 μm thick LSL alone showed a conversion efficiency of 5% despite of being pale pink in color. This impressive performance is attributed to light containment in the LSL and a low density of defect electronic states.

AB - Dye-sensitized solar cells have been fabricated with different kinds of TiO2 films including SiO2 coated and bare TiO2 microparticles as light-scattering layer (LSL). Results show that the LSL barely affects the cell's dark current, whereas under illumination, it made a significant contribution to the total photocurrent. Photo-voltage decay measurements performed under bias illumination show the density of electronic states (DOS) of the LSL to be two times smaller than that of a transparent nanoparticle layer (TNL). Strikingly, DSCs fabricated from a 4.5 μm thick LSL alone showed a conversion efficiency of 5% despite of being pale pink in color. This impressive performance is attributed to light containment in the LSL and a low density of defect electronic states.

KW - Dye sensitizer solar cells

KW - Light containment

KW - Scattering layer

KW - Solar-energy conversion

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The electronic role of the TiO₂ light-scattering layer in dye-sensitized solar cells

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