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Ultrafast Dynamics of Hole Injection and Recombination in Organometal Halide Perovskite Using Nickel Oxide as p-Type Contact Electrode.

Corani, Alice (author)
Lund University,Lunds universitet,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,Division of Chemical Physics, Lund University, Lund, Sweden
Li, Ming-Hsien (author)
Department of Photonics, National Cheng Kung University, Tainan, Taiwan
Shen, Po-Shen (author)
Department of Photonics, National Cheng Kung University, Tainan, Taiwan
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Chen, Peter (author)
Department of Photonics, National Cheng Kung University, Tainan, Taiwan; Advanced Optoelectronic Technology Center (AOTC), Tainan, Taiwan; Research Center for Energy Technology and Strategy (RCETS), Tainan, Taiwan
Guo, Tzung-Fang (author)
Department of Photonics, National Cheng Kung University, Tainan, Taiwan; Advanced Optoelectronic Technology Center (AOTC), Tainan, Taiwan; Research Center for Energy Technology and Strategy (RCETS), Tainan, Taiwan
El Nahhas, Amal (author)
Lund University,Lunds universitet,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH
Zheng, Kaibo (author)
Lund University,Lunds universitet,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,Division of Chemical Physics, Lund University, Lund, Sweden
Yartsev, Arkady (author)
Lund University,Lunds universitet,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,Division of Chemical Physics, Lund University, Lund, Sweden
Sundström, Villy (author)
Lund University,Lunds universitet,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,Division of Chemical Physics, Lund University, Lund, Sweden
Ponseca, Carlito (author)
Lund University,Lunds universitet,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,Division of Chemical Physics, Lund University, Lund, Sweden
El Nahhas, Aural (author)
Division of Chemical Physics, Lund University, Lund, Sweden
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 (creator_code:org_t)
2016-03-09
2016
English.
In: The Journal of Physical Chemistry Letters. - : American Chemical Society (ACS). - 1948-7185. ; 7, s. 1096-1101
Related links:
http://dx.doi.org/10...
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https://lup.lub.lu.s...
https://doi.org/10.1...
https://urn.kb.se/re...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • There is a mounting effort to use nickel oxide (NiO) as p-type selective electrode for organometal halide perovskite-based solar cells. Recently, an overall power conversion efficiency using this hole acceptor has reached 18%. However, ultrafast spectroscopic investigations on the mechanism of charge injection as well as recombination dynamics have yet to be studied and understood. Using time-resolved terahertz spectroscopy, we show that hole transfer is complete on the subpicosecond time scale, driven by the favorable band alignment between the valence bands of perovskite and NiO nanoparticles (NiO(np)). Recombination time between holes injected into NiO(np) and mobile electrons in the perovskite material is shown to be hundreds of picoseconds to a few nanoseconds. Because of the low conductivity of NiO(np), holes are pinned at the interface, and it is electrons that determine the recombination rate. This recombination competes with charge collection and therefore must be minimized. Doping NiO to promote higher mobility of holes is desirable in order to prevent back recombination.

Subject headings

NATURVETENSKAP  -- Kemi -- Fysikalisk kemi (hsv//swe)
NATURAL SCIENCES  -- Chemical Sciences -- Physical Chemistry (hsv//eng)
NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
TEKNIK OCH TEKNOLOGIER  -- Kemiteknik -- Annan kemiteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Chemical Engineering -- Other Chemical Engineering (hsv//eng)

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