Two-Photon Absorption in Organometallic Bromide Perovskites

Grant Walters, Brandon R. Sutherland, Sjoerd Hoogland, Dong Shi, Riccardo Comin, Daniel P. Sellan, Osman M. Bakr, Edward H. Sargent*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

252 Scopus citations

Abstract

Organometallic trihalide perovskites are solution-processed semiconductors that have made great strides in third-generation thin film light-harvesting and light-emitting optoelectronic devices. Recently, it has been demonstrated that large, high-purity single crystals of these perovskites can be synthesized from the solution phase. These crystals large dimensions, clean bandgap, and solid-state order have provided us with a suitable medium to observe and quantify two-photon absorption in perovskites. When CH3NH3PbBr3 single crystals are pumped with intense 800 nm light, we observe band-to-band photoluminescence at 572 nm, indicative of two-photon absorption. We report the nonlinear absorption coefficient of CH3NH3PbBr3 perovskites to be 8.6 cm GW-1 at 800 nm, comparable to epitaxial single-crystal semiconductors of similar bandgap. We have leveraged this nonlinear process to electrically autocorrelate a 100 fs pulsed laser using a two-photon perovskite photodetector. This work demonstrates the viability of organometallic trihalide perovskites as a convenient and low-cost nonlinear absorber for applications in ultrafast photonics.

Original languageEnglish (US)
Pages (from-to)9340-9346
Number of pages7
JournalACS nano
Volume9
Issue number9
DOIs
StatePublished - Sep 22 2015

Keywords

  • CH<inf>3</inf>NH<inf>3</inf>PbBr<inf>3</inf>
  • autocorrelator
  • perovskite
  • photoconductor
  • two-photon absorption

ASJC Scopus subject areas

  • General Engineering
  • General Physics and Astronomy
  • General Materials Science

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