Size-controllable and stable organometallic halide perovskite quantum dots/polymer films

Wonhee Cha, Hae Jin Kim, Songhee Lee, Jiwon Kim

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Organometallic halide perovskite quantum dots (OHP-QDs) have attracted a great deal of attention because of their high photoluminescence quantum yields (PLQYs, up to 90%) and narrow-band colors. However, precise control of the OHP-QDs' size is difficult and they are unstable under ambient conditions, which limits their usage in applications such as lasers and displays. Herein, we introduce a novel method to prepare size-controllable and stable OHP (methylammonium lead trihalide, MAPbX3, where X = Cl, Br, and I)-QDs/polymer films using polydimethylsiloxane (PDMS) as a template. The MAPbX3 QDs/PDMS films developed in this work are self-standing, flexible, transparent, and retain the photophysical properties of OHP-QDs for at least several months. Moreover, the uniform size of the OHP-QDs results in narrow photoluminescence (PL) emission (full-width-at-half-maximum, FWHM ≈ 20 nm) compared to that of QDs synthesized by a conventional method (≈50 nm). The PL emission peak can be shifted by varying the size of the QDs and also by changing the halide component (Cl, Br, and I), covering a wide range of absorption wavelengths. Furthermore, the higher PL intensity of the larger QDs was confirmed by time-correlated single photon counting (TCSPC) experiments.

Original languageEnglish
Pages (from-to)6667-6671
Number of pages5
JournalJournal of Materials Chemistry C
Volume5
Issue number27
DOIs
Publication statusPublished - 2017 Jan 1

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Organometallics
Polymer films
Perovskite
Semiconductor quantum dots
Photoluminescence
Polydimethylsiloxane
Full width at half maximum
Quantum yield
Photons
Lead
Display devices
Color
Wavelength
perovskite
Lasers
Experiments
baysilon

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

Cite this

Cha, Wonhee ; Kim, Hae Jin ; Lee, Songhee ; Kim, Jiwon. / Size-controllable and stable organometallic halide perovskite quantum dots/polymer films. In: Journal of Materials Chemistry C. 2017 ; Vol. 5, No. 27. pp. 6667-6671.
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Size-controllable and stable organometallic halide perovskite quantum dots/polymer films. / Cha, Wonhee; Kim, Hae Jin; Lee, Songhee; Kim, Jiwon.

In: Journal of Materials Chemistry C, Vol. 5, No. 27, 01.01.2017, p. 6667-6671.

Research output: Contribution to journalArticle

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