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Vibronic coherence contributes to photocurrent generation in organic semiconductor heterojunction diodes

Bian, Qingzhen, 1988- (author)
Linköping University,Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
Ma, Fei (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
Chen, Shula, 1986- (author)
Linköping University,Linköpings universitet,Institutionen för fysik, kemi och biologi,Tekniska fakulteten
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Wei, Qi (author)
Univ Macau, Inst Appl Phys & Mat Engn, Macau, Peoples R China.,Institute of Applied Physics and Materials Engineering, University of Macau, Macau SAR, China
Su, Xiaojun (author)
Lund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Other operations, LTH,Faculty of Engineering, LTH,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH
Buyanova, Irina A, 1960- (author)
Linköping University,Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
Chen, Weimin, 1959- (author)
Linköping University,Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
Ponseca, Carlito S., 1979- (author)
Linköping University,Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
Linares, Mathieu (author)
KTH Royal Institute of Technology,KTH,Teoretisk kemi och biologi,Department of Theoretical Chemistry and Biology, KTH Royal Institute of Technology, Stockholm, Sweden
Karki, Khadga J. (author)
Lund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Other operations, LTH,Faculty of Engineering, LTH,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH
Yartsev, Arkady (author)
Lund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Other operations, LTH,Faculty of Engineering, LTH,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH
Inganäs, Olle, 1951- (author)
Linköping University,Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
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 (creator_code:org_t)
2020-01-30
2020
English.
In: Nature Communications. - : NATURE PUBLISHING GROUP. - 2041-1723. ; 11:1
Related links:
https://doi.org/10.1...
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https://www.nature.c...
https://liu.diva-por... (primary) (Raw object)
http://dx.doi.org/10... (free)
https://urn.kb.se/re...
https://doi.org/10.1...
https://urn.kb.se/re...
https://lup.lub.lu.s...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Charge separation dynamics after the absorption of a photon is a fundamental process relevant both for photosynthetic reaction centers and artificial solar conversion devices. It has been proposed that quantum coherence plays a role in the formation of charge carriers in organic photovoltaics, but experimental proofs have been lacking. Here we report experimental evidence of coherence in the charge separation process in organic donor/acceptor heterojunctions, in the form of low frequency oscillatory signature in the kinetics of the transient absorption and nonlinear two-dimensional photocurrent spectroscopy. The coherence plays a decisive role in the initial 200 femtoseconds as we observe distinct experimental signatures of coherent photocurrent generation. This coherent process breaks the energy barrier limitation for charge formation, thus competing with excitation energy transfer. The physics may inspire the design of new photovoltaic materials with high device performance, which explore the quantum effects in the next-generation optoelectronic applications.

Subject headings

NATURVETENSKAP  -- Kemi -- Fysikalisk kemi (hsv//swe)
NATURAL SCIENCES  -- Chemical Sciences -- Physical Chemistry (hsv//eng)
NATURVETENSKAP  -- Fysik -- Annan fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Other Physics Topics (hsv//eng)
NATURVETENSKAP  -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

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