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Novel Molecular Doping Mechanism for n-Doping of SnO 2 via Triphenylphosphine Oxide and Its Effect on Perovskite Solar Cells
Tu B.1; Shao Y.2; Chen W.1; Wu Y.1; Li X.1; He Y.1; Li J.1; Liu F.3; Zhang Z.1; Lin Y.1; Lan X.1; Xu L.1; Shi X.1; Ng A.M.C.1; Li H.2; Chung L.W.1; Djurisic A.B.3; He Z.1
2019
Source PublicationAdvanced Materials
ISSN15214095 09359648
AbstractMolecular doping of inorganic semiconductors is a rising topic in the field of organic/inorganic hybrid electronics. However, it is difficult to find dopant molecules which simultaneously exhibit strong reducibility and stability in ambient atmosphere, which are needed for n-type doping of oxide semiconductors. Herein, successful n-type doping of SnO is demonstrated by a simple, air-robust, and cost-effective triphenylphosphine oxide molecule. Strikingly, it is discovered that electrons are transferred from the R3P O σ-bond to the peripheral tin atoms other than the directly interacted ones at the surface. That means those electrons are delocalized. The course is verified by multi-photophysical characterizations. This doping effect accounts for the enhancement of conductivity and the decline of work function of SnO , which enlarges the built-in field from 0.01 to 0.07 eV and decreases the energy barrier from 0.55 to 0.39 eV at the SnO /perovskite interface enabling an increase in the conversion efficiency of perovskite solar cells from 19.01% to 20.69%.
Keyworddelocalized electrons molecular doping n-type perovskite solar cells SnO 2
DOI10.1002/adma.201805944
URLView the original
Language英語
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Cited Times [WOS]:2   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Southern University of Science and Technology
2.Universidade de Macau
3.The University of Hong Kong
Recommended Citation
GB/T 7714
Tu B.,Shao Y.,Chen W.,et al. Novel Molecular Doping Mechanism for n-Doping of SnO 2 via Triphenylphosphine Oxide and Its Effect on Perovskite Solar Cells[J]. Advanced Materials,2019.
APA Tu B..,Shao Y..,Chen W..,Wu Y..,Li X..,...&He Z..(2019).Novel Molecular Doping Mechanism for n-Doping of SnO 2 via Triphenylphosphine Oxide and Its Effect on Perovskite Solar Cells.Advanced Materials.
MLA Tu B.,et al."Novel Molecular Doping Mechanism for n-Doping of SnO 2 via Triphenylphosphine Oxide and Its Effect on Perovskite Solar Cells".Advanced Materials (2019).
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