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Unveiling hole trap...
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D'Amario, Luca,1986-Uppsala universitet,Fysikalisk kemi,Leif Hammarström
(author)
Unveiling hole trapping and surface dynamics of NiO nanoparticles
- Article/chapterEnglish2018
Publisher, publication year, extent ...
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2018
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electronicrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:uu-320185
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-320185URI
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https://doi.org/10.1039/C7SC03442CDOI
Supplementary language notes
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Language:English
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Summary in:English
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Classification
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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The research effort in mesoporous p-type semiconductors is increasing due to their potential application in photoelectrochemical energy conversion devices. In this paper an electron-hole pair is created by band-gap excitation of NiO nanoparticles and the dynamics of the electron and the hole is followed until their recombination. By spectroscopic characterization it was found that surface Ni3+ states work as traps for both electrons and holes. The trapped electron was assigned to a N2+ state and the trapped hole to a Ni4+ state. The recombination kinetics of these traps was studied and related with the concept of hole relaxation suggested before.The timescale of the hole relaxation was foundto be in the order of tens of ns. Finally the spectrosc opic evidence of this relaxation is presented in a sensitized film.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
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Föhlinger, JensUppsala universitet,Fysikalisk kemi(Swepub:uu)jenfo104
(author)
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Boschloo, GerritUppsala universitet,Fysikalisk kemi(Swepub:uu)gerrbosc
(author)
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Hammarström, Leif,1964-Uppsala universitet,Fysikalisk kemi(Swepub:uu)leifhamm
(author)
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Uppsala universitetFysikalisk kemi
(creator_code:org_t)
Related titles
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In:Chemical Science9:1, s. 223-2302041-65202041-6539
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