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Vibronic coherence contributes to photocurrent generation in organic semiconductor heterojunction diodes
Bian, Qingzhen1; Ma, Fei2; Chen, Shula1; Wei, Qi3; Su, Xiaojun2; Buyanova, Irina A.1; Chen, Weimin M.1; Ponseca, Carlito S.1; Linares, Mathieu4; Karki, Khadga J.2; Yartsev, Arkady2; Inganäs, Olle1
2020-12-01
Source PublicationNature Communications
ISSN2041-1723
Volume11Issue:1
Abstract

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.

DOI10.1038/s41467-020-14476-w
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000524950500001
Scopus ID2-s2.0-85078713267
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Cited Times [WOS]:18   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorBian, Qingzhen; Inganäs, Olle
Affiliation1.Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping, 58183, Sweden
2.Division of Chemical Physics, Lund University, Lund, 22100, Sweden
3.Institute of Applied Physics and Materials Engineering, University of Macau, Macao
4.Department of Theoretical Chemistry and Biology, KTH Royal Institute of Technology, Stockholm, 10691, Sweden
Recommended Citation
GB/T 7714
Bian, Qingzhen,Ma, Fei,Chen, Shula,et al. Vibronic coherence contributes to photocurrent generation in organic semiconductor heterojunction diodes[J]. Nature Communications,2020,11(1).
APA Bian, Qingzhen,Ma, Fei,Chen, Shula,Wei, Qi,Su, Xiaojun,Buyanova, Irina A.,Chen, Weimin M.,Ponseca, Carlito S.,Linares, Mathieu,Karki, Khadga J.,Yartsev, Arkady,&Inganäs, Olle.(2020).Vibronic coherence contributes to photocurrent generation in organic semiconductor heterojunction diodes.Nature Communications,11(1).
MLA Bian, Qingzhen,et al."Vibronic coherence contributes to photocurrent generation in organic semiconductor heterojunction diodes".Nature Communications 11.1(2020).
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