Molecularly engineered Ru(II) sensitizers compatible with cobalt(II/III) redox mediators for dye-sensitized solar cells

Kuan Lin Wu; Aron J. Huckaba; John N. Clifford; Ya Wen Yang; Aswani Yella; Emilio Palomares; Michael Grätzel; Yun Chi; Mohammad Khaja Nazeeruddin

doi:10.1021/acs.inorgchem.6b00427

Molecularly engineered Ru(II) sensitizers compatible with cobalt(II/III) redox mediators for dye-sensitized solar cells

Kuan Lin Wu
, Aron J. Huckaba
, John N. Clifford
, Ya Wen Yang
, Aswani Yella
, Emilio Palomares
, Michael Grätzel
, Yun Chi
, Mohammad Khaja Nazeeruddin

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

25 Scopus citations

Abstract

Thiocyanate-free isoquinazolylpyrazolate Ru(II) complexes were synthesized and applied as sensitizers in dye-sensitized solar cells (DSCs). Unlike most other successful Ru sensitizers, Co-based electrolytes were used, and resulting record efficiency of 9.53% was obtained under simulated sunlight with an intensity of 100 mW cm^-2. Specifically, dye 51-57dht.1 and an electrolyte based on Co(phen)₃ led to measurement of a J_SC of 13.89 mA cm^-2, V_OC of 900 mV, and FF of 0.762 to yield 9.53% efficiency. The improved device performances were achieved by the inclusion of 2-hexylthiophene units onto the isoquinoline subunits, in addition to lengthening the perfluoroalkyl chain on the pyrazolate chelating group, which worked to increase light absorption and decrease recombination effects when using the Co-based electrolyte. As this study shows, Ru(II) sensitizers bearing sterically demanding ligands can allow successful utilization of important Co electrolytes and high performance.

Original language	English
Pages (from-to)	7388-7395
Number of pages	8
Journal	Inorganic Chemistry
Volume	55
Issue number	15
DOIs	https://doi.org/10.1021/acs.inorgchem.6b00427
State	Published - Aug 1 2016

Bibliographical note

Publisher Copyright:
© 2016 American Chemical Society.

Funding

A.J.H. and M.K.N. thank the European Commission H2020-ICT-2014-1, SOLEDLIGHT project, grant agreement 643791, and the Swiss State Secretariat for Education, Research and Innovation (SERI). Y.C. thanks the MOST of Taiwan for funding (grant 104-2119-M-007-001).

Funders	Funder number
European Commission H2020-ICT-2014-1
MOST of Taiwan	104-2119-M-007-001
Horizon 2020 Framework Programme	643791
Singapore Eye Research Institute
Staatssekretariat für Bildung, Forschung und Innovation

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry

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10.1021/acs.inorgchem.6b00427

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title = "Molecularly engineered Ru(II) sensitizers compatible with cobalt(II/III) redox mediators for dye-sensitized solar cells",

abstract = "Thiocyanate-free isoquinazolylpyrazolate Ru(II) complexes were synthesized and applied as sensitizers in dye-sensitized solar cells (DSCs). Unlike most other successful Ru sensitizers, Co-based electrolytes were used, and resulting record efficiency of 9.53\% was obtained under simulated sunlight with an intensity of 100 mW cm-2. Specifically, dye 51-57dht.1 and an electrolyte based on Co(phen)3 led to measurement of a JSC of 13.89 mA cm-2, VOC of 900 mV, and FF of 0.762 to yield 9.53\% efficiency. The improved device performances were achieved by the inclusion of 2-hexylthiophene units onto the isoquinoline subunits, in addition to lengthening the perfluoroalkyl chain on the pyrazolate chelating group, which worked to increase light absorption and decrease recombination effects when using the Co-based electrolyte. As this study shows, Ru(II) sensitizers bearing sterically demanding ligands can allow successful utilization of important Co electrolytes and high performance.",

author = "Wu, \{Kuan Lin\} and Huckaba, \{Aron J.\} and Clifford, \{John N.\} and Yang, \{Ya Wen\} and Aswani Yella and Emilio Palomares and Michael Gr{\"a}tzel and Yun Chi and Nazeeruddin, \{Mohammad Khaja\}",

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doi = "10.1021/acs.inorgchem.6b00427",

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AU - Wu, Kuan Lin

AU - Huckaba, Aron J.

AU - Clifford, John N.

AU - Yang, Ya Wen

AU - Yella, Aswani

AU - Palomares, Emilio

AU - Grätzel, Michael

AU - Chi, Yun

AU - Nazeeruddin, Mohammad Khaja

PY - 2016/8/1

Y1 - 2016/8/1

N2 - Thiocyanate-free isoquinazolylpyrazolate Ru(II) complexes were synthesized and applied as sensitizers in dye-sensitized solar cells (DSCs). Unlike most other successful Ru sensitizers, Co-based electrolytes were used, and resulting record efficiency of 9.53% was obtained under simulated sunlight with an intensity of 100 mW cm-2. Specifically, dye 51-57dht.1 and an electrolyte based on Co(phen)3 led to measurement of a JSC of 13.89 mA cm-2, VOC of 900 mV, and FF of 0.762 to yield 9.53% efficiency. The improved device performances were achieved by the inclusion of 2-hexylthiophene units onto the isoquinoline subunits, in addition to lengthening the perfluoroalkyl chain on the pyrazolate chelating group, which worked to increase light absorption and decrease recombination effects when using the Co-based electrolyte. As this study shows, Ru(II) sensitizers bearing sterically demanding ligands can allow successful utilization of important Co electrolytes and high performance.

AB - Thiocyanate-free isoquinazolylpyrazolate Ru(II) complexes were synthesized and applied as sensitizers in dye-sensitized solar cells (DSCs). Unlike most other successful Ru sensitizers, Co-based electrolytes were used, and resulting record efficiency of 9.53% was obtained under simulated sunlight with an intensity of 100 mW cm-2. Specifically, dye 51-57dht.1 and an electrolyte based on Co(phen)3 led to measurement of a JSC of 13.89 mA cm-2, VOC of 900 mV, and FF of 0.762 to yield 9.53% efficiency. The improved device performances were achieved by the inclusion of 2-hexylthiophene units onto the isoquinoline subunits, in addition to lengthening the perfluoroalkyl chain on the pyrazolate chelating group, which worked to increase light absorption and decrease recombination effects when using the Co-based electrolyte. As this study shows, Ru(II) sensitizers bearing sterically demanding ligands can allow successful utilization of important Co electrolytes and high performance.

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Molecularly engineered Ru(II) sensitizers compatible with cobalt(II/III) redox mediators for dye-sensitized solar cells

Abstract

Bibliographical note

Funding

ASJC Scopus subject areas

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