Well-organized mesoporous TiO2 photoelectrodes by block copolymer-induced sol-gel assembly for inorganic-organic hybrid perovskite solar cells

Arpita Sarkar, Nam Joong Jeon, Jun Hong Noh, Sang Il Seok

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

A well-aligned mesoporous thin layer was formed by spin-coating followed by the burn-out of its organic components at 500 °C. This film, prepared by an inorganic sol-gel process using block copolymers as a sacrificial template, showed mesoporous (mp) and crack-free layers with various pore sizes depending on the amount of 1,3,5-trimethylbenzene (TMB), which acted as a swelling agent. The mesoporous photoanodes were used in the fabrication of CH3NH 3Pb(I0.9Br0.1)3 perovskite-based solar cells. The cells showed overall power conversion efficiencies of 11.7% and 12.8% with the 10 and 15 nm mp-layers, respectively. The superior performance shown in the 15 nm mp-layers may be attributed to the easier filling of CH 3NH3Pb(I0.9Br0.1)3 by bigger pore sizes, and the efficiency is comparable with that of the reference cell fabricated by TiO2 paste. This template-induced self-organizing sol-gel process was shown to be a useful technique for depositing mesoporous photoanodes in the fabrication of perovskite-based solar cells.

Original languageEnglish
Pages (from-to)16688-16693
Number of pages6
JournalJournal of Physical Chemistry C
Volume118
Issue number30
DOIs
Publication statusPublished - 2014 Jul 31

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block copolymers
Perovskite
Sol-gel process
Block copolymers
Pore size
Sol-gels
Solar cells
assembly
solar cells
gels
Fabrication
Spin coating
sol-gel processes
Ointments
Conversion efficiency
Swelling
templates
Cracks
porosity
fabrication

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this

Well-organized mesoporous TiO2 photoelectrodes by block copolymer-induced sol-gel assembly for inorganic-organic hybrid perovskite solar cells. / Sarkar, Arpita; Jeon, Nam Joong; Noh, Jun Hong; Seok, Sang Il.

In: Journal of Physical Chemistry C, Vol. 118, No. 30, 31.07.2014, p. 16688-16693.

Research output: Contribution to journalArticle

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