Nanostructured TiO2/CH3NH3PbI3 heterojunction solar cells employing spiro-OMeTAD/Co-complex as hole-transporting material

Jun Hong Noh, Nam Joong Jeon, Yong Chan Choi, Md K. Nazeeruddin, Michael Grätzel, Sang Il Seok

Research output: Contribution to journalArticle

196 Citations (Scopus)

Abstract

For using 2,2′,7,7′-tetrakis(N,N′-di-p- methoxyphenylamine)-9,9′-spirobifluorene (spiro-OMeTAD) as a hole conductor in solar cells, it is necessary to improve its charge-transport properties through electrochemical doping. With the aim of fabricating efficient mesoscopic TiO2/CH3NH3PbI3 heterojunction solar cells, we used tris[2-(1H-pyrazol-1-yl)-4-tert- butylpyridine)cobalt(iii) tris(bis(trifluoromethylsulfonyl) imide)] (FK209) as a p-dopant for spiro-OMeTAD. The mixture of spiro-OMeTAD, FK209, lithium bis(trifluoromethylsulfonyl)imide (Li-TFSI), and 4-tert-butylpyridine (TBP) exhibited significantly higher performance than mixtures of pristine spiro-OMeTAD, spiro-OMeTAD, and FK209, and spiro-OMeTAD, Li-TFSI, and TBP. Such a synergistic effect between the Co-complex and Li-TFSI in conjunction with spiro-OMeTAD effectively improved the power conversion efficiency (PCE) of the fabricated solar cells. As a result, we achieved PCE of 10.4%, measured under standard solar conditions (AM 1.5G, 100 mW cm-2).

Original languageEnglish
Pages (from-to)11842-11847
Number of pages6
JournalJournal of Materials Chemistry A
Volume1
Issue number38
DOIs
Publication statusPublished - 2013 Oct 14
Externally publishedYes

Fingerprint

Imides
Heterojunctions
Solar cells
Conversion efficiency
Doping (additives)
Cobalt
Lithium
Transport properties
Charge transfer
4-tert-butylpyridine
Bistris

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Nanostructured TiO2/CH3NH3PbI3 heterojunction solar cells employing spiro-OMeTAD/Co-complex as hole-transporting material. / Noh, Jun Hong; Jeon, Nam Joong; Choi, Yong Chan; Nazeeruddin, Md K.; Grätzel, Michael; Seok, Sang Il.

In: Journal of Materials Chemistry A, Vol. 1, No. 38, 14.10.2013, p. 11842-11847.

Research output: Contribution to journalArticle

Noh, Jun Hong ; Jeon, Nam Joong ; Choi, Yong Chan ; Nazeeruddin, Md K. ; Grätzel, Michael ; Seok, Sang Il. / Nanostructured TiO2/CH3NH3PbI3 heterojunction solar cells employing spiro-OMeTAD/Co-complex as hole-transporting material. In: Journal of Materials Chemistry A. 2013 ; Vol. 1, No. 38. pp. 11842-11847.
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