Lead-free solid-state organic-inorganic halide perovskite solar cells

Feng Hao, Constantinos C. Stoumpos, Duyen Hanh Cao, Robert P. H. Chang, Mercouri G Kanatzidis

Research output: Contribution to journalArticle

1138 Citations (Scopus)

Abstract

Lead-free solution-processed solid-state photovoltaic devices based on methylammonium tin iodide (CH 3 NH 3 SnI 3) perovskite semiconductor as the light harvester are reported. Featuring an optical bandgap of 1.3 eV, the CH 3 NH 3 SnI 3 perovskite material can be incorporated into devices with the organic hole-transport layer spiro-OMeTAD and show an absorption onset at 950 nm, which is significantly redshifted compared with the benchmark CH 3 NH 3 PbI 3 counterpart (1.55 eV). Bandgap engineering was implemented by chemical substitution in the form of CH 3 NH 3 SnI 3-x Br x solid solutions, which can be controllably tuned to cover much of the visible spectrum, thus enabling the realization of lead-free solar cells with an initial power conversion efficiency of 5.73% under simulated full sunlight. Further efficiency enhancements are expected following optimization and a better fundamental understanding of the internal electron dynamics and corresponding interfacial engineering. The reported CH 3 NH 3 SnI 3-x Br x perovskite solar cells represent a step towards the realization of low-cost, environmentally friendly solid-state solar cells.

Original languageEnglish
Pages (from-to)489-494
Number of pages6
JournalNature Photonics
Volume8
Issue number6
DOIs
Publication statusPublished - 2014

Fingerprint

Perovskite
halides
Solar cells
Lead
solar cells
methylidyne
solid state
Harvesters
Tin
Optical band gaps
Iodides
Conversion efficiency
Solid solutions
Energy gap
Substitution reactions
Semiconductor materials
Electrons
engineering
Costs
sunlight

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

Cite this

Lead-free solid-state organic-inorganic halide perovskite solar cells. / Hao, Feng; Stoumpos, Constantinos C.; Cao, Duyen Hanh; Chang, Robert P. H.; Kanatzidis, Mercouri G.

In: Nature Photonics, Vol. 8, No. 6, 2014, p. 489-494.

Research output: Contribution to journalArticle

Hao, Feng ; Stoumpos, Constantinos C. ; Cao, Duyen Hanh ; Chang, Robert P. H. ; Kanatzidis, Mercouri G. / Lead-free solid-state organic-inorganic halide perovskite solar cells. In: Nature Photonics. 2014 ; Vol. 8, No. 6. pp. 489-494.
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