Circularly Polarized Light Emission from Nonchiral Perovskites Incorporated into Nanoporous Cholesteric Polymer Templates

Yong Jun Choi, Jae Jin Lee, Jun Sung Park, Haeun Kang, Minju Kim, Jeongwon Kim, Daichi Okada, Dong Ha Kim, Fumito Araoka, Suk Won Choi

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Chiral perovskites have garnered significant attention, owing to their chiroptical properties and emerging applications. Current fabrication methods often involve complex chemical synthesis routes. Herein, an alternative approach for introducing chirality into nonchiral hybrid organic-inorganic perovskites (HOIPs) using nanotemplates composed of cholesteric polymeric networks is proposed. This method eliminates the need for additional molecular design. In this process, HOIP precursors are incorporated into a porous cholesteric polymer film, and two-dimensional (2D) HOIPs grow inside the nanopores. Circularly polarized light emission (CPLE) was observed even though the selective reflection band of the cholesteric polymer films containing a representative HOIP deviated from the emission wavelength of the 2D HOIP. This effect was confirmed by the induced circular dichroism (CD) observed in the absorbance band of the HOIP. The observed CPLE and CD are attributed to the chirality induced by the template in the originally nonchiral 2D HOIP. Additionally, the developed 2D HOIP exhibited a long exciton lifetime and good stability under harsh conditions. These findings provide valuable insights into the development and design of innovative optoelectronic materials.

Original languageEnglish
Pages (from-to)909-918
Number of pages10
JournalACS Nano
Issue number1
StatePublished - 9 Jan 2024

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© 2023 American Chemical Society.


  • chirality
  • cholesteric nanotemplates
  • circular dichroism
  • circularly polarized light emission
  • hybrid organic−inorganic perovskites


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