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Chemical and Physic...
Chemical and Physical Reduction of High Valence Ni States in Mesoporous NiO Film for Solar Cell Application
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- D'Amario, Luca (author)
- Uppsala universitet,Fysikalisk kemi,Leif Hammarström
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- Jiang, Roger (author)
- Uppsala universitet,Fysikalisk kemi
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- Cappel, Ute B. (author)
- Uppsala universitet,Molekyl- och kondenserade materiens fysik
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- Gibson, Elizabeth A. (author)
- Newcastle Univ, Sch Chem, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
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- Boschloo, Gerrit (author)
- Uppsala universitet,KTH,Kemi,Fysikalisk kemi,Royal Inst Technol KTH, Ctr Mol Devices, Dept Chem, S-10044 Stockholm, Sweden
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- Rensmo, Håkan (author)
- Uppsala universitet,Molekyl- och kondenserade materiens fysik
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- Sun, Licheng, 1962- (author)
- KTH,Kemi,Royal Inst Technol KTH, Ctr Mol Devices, Dept Chem, S-10044 Stockholm, Sweden.; Organ Chem Royal Inst Technol KTH, Dept Chem, S-10044 Stockholm, Sweden.
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- Hammarström, Leif, 1964- (author)
- Uppsala universitet,Fysikalisk kemi
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- Tian, Haining, 1983- (author)
- Uppsala universitet,KTH,Kemi,Fysikalisk kemi,Royal Inst Technol KTH, Ctr Mol Devices, Dept Chem, S-10044 Stockholm, Sweden
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(creator_code:org_t)
- 2017-04-03
- 2017
- English.
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In: ACS Applied Materials and Interfaces. - : AMER CHEMICAL SOC. - 1944-8244 .- 1944-8252. ; 9:39, s. 33470-33477
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Abstract
Subject headings
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- The most common material for dye-sensitized photocathodes is mesoporous NiO. We transformed the usual brownish NiO to be more transparent by reducing high valence Ni impurities. Two pretreatment methods have been used: chemical reduction by NaBH4 and thermal reduction by heating. The power conversion efficiency of the cell was increased by 33% through chemical treatment, and an increase in open-circuit voltage from 105 to 225 mV was obtained upon heat treatment. By optical spectroelectrochemistry, we could identify two species with characteristically different spectra assigned to Ni3+ and Ni4+. We suggest that the reduction of surface Ni3+ and Ni (4+) to Ni (2+) decreases the recombination reaction between holes on the NiO surface with the electrolyte. It also keeps the dye firmly on the surface, building a barrier for electrolyte recombination. This causes an increase in open-circuit photovoltage for the treated film.
Subject headings
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Keyword
- p-type
- dye-sensitized solar cell
- characterization
- hole UV-vis spectrum
- photovoltage
- recombination
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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D'Amario, Luca
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Jiang, Roger
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Cappel, Ute B.
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Gibson, Elizabet ...
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Boschloo, Gerrit
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Rensmo, Håkan
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Sun, Licheng, 19 ...
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Hammarström, Lei ...
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Tian, Haining, 1 ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Materials Chemis ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Physical Chemist ...
- Articles in the publication
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ACS Applied Mate ...
- By the university
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Royal Institute of Technology
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Uppsala University