Enhanced electronic properties in mesoporous TiO2 via lithium doping for high-efficiency perovskite solar cells

Fabrizio Giordano, Antonio Abate, Juan Pablo Correa Baena, Michael Saliba, Taisuke Matsui, Sang Hyuk Im, Shaik M. Zakeeruddin, Mohammad Khaja Nazeeruddin, Anders Hagfeldt, Michael Graetzel

Research output: Contribution to journalArticle

405 Citations (Scopus)

Abstract

Perovskite solar cells are one of the most promising photovoltaic technologies with their extraordinary progress in efficiency and the simple processes required to produce them. However, the frequent presence of a pronounced hysteresis in the current voltage characteristic of these devices arises concerns on the intrinsic stability of organo-metal halides, challenging the reliability of technology itself. Here, we show that n-doping of mesoporous TiO2 is accomplished by facile post treatment of the films with lithium salts. We demonstrate that the Li-doped TiO2 electrodes exhibit superior electronic properties, by reducing electronic trap states enabling faster electron transport. Perovskite solar cells prepared using the Li-doped films as scaffold to host the CH3 NH3 PbI3 light harvester produce substantially higher performances compared with undoped electrodes, improving the power conversion efficiency from 17 to over 19% with negligible hysteretic behaviour (lower than 0.3%).

Original languageEnglish
Article number10379
JournalNature communications
Volume7
DOIs
Publication statusPublished - 2016 Jan 13
Externally publishedYes

Fingerprint

Lithium
Electronic properties
Electrodes
lithium
solar cells
Doping (additives)
Technology
Metal halides
metal halides
Harvesters
electrodes
Current voltage characteristics
Electron Transport
electronics
Scaffolds
Conversion efficiency
Hysteresis
Salts
Metals
hysteresis

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Enhanced electronic properties in mesoporous TiO2 via lithium doping for high-efficiency perovskite solar cells. / Giordano, Fabrizio; Abate, Antonio; Correa Baena, Juan Pablo; Saliba, Michael; Matsui, Taisuke; Im, Sang Hyuk; Zakeeruddin, Shaik M.; Nazeeruddin, Mohammad Khaja; Hagfeldt, Anders; Graetzel, Michael.

In: Nature communications, Vol. 7, 10379, 13.01.2016.

Research output: Contribution to journalArticle

Giordano, F, Abate, A, Correa Baena, JP, Saliba, M, Matsui, T, Im, SH, Zakeeruddin, SM, Nazeeruddin, MK, Hagfeldt, A & Graetzel, M 2016, 'Enhanced electronic properties in mesoporous TiO2 via lithium doping for high-efficiency perovskite solar cells', Nature communications, vol. 7, 10379. https://doi.org/10.1038/ncomms10379
Giordano, Fabrizio ; Abate, Antonio ; Correa Baena, Juan Pablo ; Saliba, Michael ; Matsui, Taisuke ; Im, Sang Hyuk ; Zakeeruddin, Shaik M. ; Nazeeruddin, Mohammad Khaja ; Hagfeldt, Anders ; Graetzel, Michael. / Enhanced electronic properties in mesoporous TiO2 via lithium doping for high-efficiency perovskite solar cells. In: Nature communications. 2016 ; Vol. 7.
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AU - Im, Sang Hyuk

AU - Zakeeruddin, Shaik M.

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