Light-induced lattice expansion leads to high-efficiency perovskite solar cells

Hsinhan Tsai, Reza Asadpour, Jean Christophe Blancon, Constantinos C. Stoumpos, Olivier Durand, Joseph W. Strzalka, Bo Chen, Rafael Verduzco, Pulickel M. Ajayan, Sergei Tretiak, Jacky Even, Muhammad Ashraf Alam, Mercouri G Kanatzidis, Wanyi Nie, Aditya D. Mohite

Research output: Contribution to journalArticle

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Abstract

Light-induced structural dynamics plays a vital role in the physical properties, device performance, and stability of hybrid perovskite-based optoelectronic devices. We report that continuous light illumination leads to a uniform lattice expansion in hybrid perovskite thin films, which is critical for obtaining high-efficiency photovoltaic devices. Correlated, in situ structural and device characterizations reveal that light-induced lattice expansion benefits the performances of a mixed-cation pure-halide planar device, boosting the power conversion efficiency from 18.5 to 20.5%.The lattice expansion leads to the relaxation of local lattice strain, which lowers the energetic barriers at the perovskite-contact interfaces, thus improving the open circuit voltage and fill factor. The light-induced lattice expansion did not compromise the stability of these high-efficiency photovoltaic devices under continuous operation at full-spectrum 1-sun (100 milliwatts per square centimeter) illumination for more than 1500 hours.

Original languageEnglish
Pages (from-to)67-70
Number of pages4
JournalScience
Volume360
Issue number6384
DOIs
Publication statusPublished - Jan 1 2018

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solar cells
expansion
illumination
dynamic structural analysis
optoelectronic devices
open circuit voltage
halides
sun
physical properties
cations
thin films

ASJC Scopus subject areas

  • General

Cite this

Tsai, H., Asadpour, R., Blancon, J. C., Stoumpos, C. C., Durand, O., Strzalka, J. W., ... Mohite, A. D. (2018). Light-induced lattice expansion leads to high-efficiency perovskite solar cells. Science, 360(6384), 67-70. https://doi.org/10.1126/science.aap8671

Light-induced lattice expansion leads to high-efficiency perovskite solar cells. / Tsai, Hsinhan; Asadpour, Reza; Blancon, Jean Christophe; Stoumpos, Constantinos C.; Durand, Olivier; Strzalka, Joseph W.; Chen, Bo; Verduzco, Rafael; Ajayan, Pulickel M.; Tretiak, Sergei; Even, Jacky; Alam, Muhammad Ashraf; Kanatzidis, Mercouri G; Nie, Wanyi; Mohite, Aditya D.

In: Science, Vol. 360, No. 6384, 01.01.2018, p. 67-70.

Research output: Contribution to journalArticle

Tsai, H, Asadpour, R, Blancon, JC, Stoumpos, CC, Durand, O, Strzalka, JW, Chen, B, Verduzco, R, Ajayan, PM, Tretiak, S, Even, J, Alam, MA, Kanatzidis, MG, Nie, W & Mohite, AD 2018, 'Light-induced lattice expansion leads to high-efficiency perovskite solar cells', Science, vol. 360, no. 6384, pp. 67-70. https://doi.org/10.1126/science.aap8671
Tsai H, Asadpour R, Blancon JC, Stoumpos CC, Durand O, Strzalka JW et al. Light-induced lattice expansion leads to high-efficiency perovskite solar cells. Science. 2018 Jan 1;360(6384):67-70. https://doi.org/10.1126/science.aap8671
Tsai, Hsinhan ; Asadpour, Reza ; Blancon, Jean Christophe ; Stoumpos, Constantinos C. ; Durand, Olivier ; Strzalka, Joseph W. ; Chen, Bo ; Verduzco, Rafael ; Ajayan, Pulickel M. ; Tretiak, Sergei ; Even, Jacky ; Alam, Muhammad Ashraf ; Kanatzidis, Mercouri G ; Nie, Wanyi ; Mohite, Aditya D. / Light-induced lattice expansion leads to high-efficiency perovskite solar cells. In: Science. 2018 ; Vol. 360, No. 6384. pp. 67-70.
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