Charged Polariton Luminescence from an Organic Semiconductor Microcavity

Chiao Yu Cheng, Hoyeon Kim, Noel Christopher Giebink

Research output: Contribution to journalArticle

Abstract

Strong coupling light to polaron optical transitions in an organic semiconductor microcavity leads to an unusual class of polariton that possesses a net charge. This species may offer a range of technologically useful optoelectronic properties but has thus far only been observed in passive reflectivity measurements. Here, we report room-temperature photoluminescence from both upper and lower branch polaron polariton states that originate from hole excitations in a p-doped 4,4′-cyclohexylidenebis[N,N-bis(4-methylphenyl)benzenamine] (TAPC) microcavity. Our observations under nonresonant excitation are in good agreement with classical dipole emission modeling, which suggests that polariton states in this system are populated radiatively via fluorescence from the polaron excited state reservoir. These results constitute one of the first observations of polaron luminescence from an organic semiconductor thin film and are an important prerequisite for realizing a charged polariton condensate.

Original languageEnglish (US)
Pages (from-to)308-313
Number of pages6
JournalACS Photonics
Volume6
Issue number2
DOIs
StatePublished - Feb 20 2019

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Gene Conversion
Semiconductors
Semiconducting organic compounds
Microcavities
organic semiconductors
Luminescence
polaritons
luminescence
Optical transitions
Excited states
Optoelectronic devices
Photoluminescence
Fluorescence
excitation
Thin films
optical transition
condensates
dipoles
reflectance
photoluminescence

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biotechnology
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

Cite this

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abstract = "Strong coupling light to polaron optical transitions in an organic semiconductor microcavity leads to an unusual class of polariton that possesses a net charge. This species may offer a range of technologically useful optoelectronic properties but has thus far only been observed in passive reflectivity measurements. Here, we report room-temperature photoluminescence from both upper and lower branch polaron polariton states that originate from hole excitations in a p-doped 4,4′-cyclohexylidenebis[N,N-bis(4-methylphenyl)benzenamine] (TAPC) microcavity. Our observations under nonresonant excitation are in good agreement with classical dipole emission modeling, which suggests that polariton states in this system are populated radiatively via fluorescence from the polaron excited state reservoir. These results constitute one of the first observations of polaron luminescence from an organic semiconductor thin film and are an important prerequisite for realizing a charged polariton condensate.",
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Charged Polariton Luminescence from an Organic Semiconductor Microcavity. / Cheng, Chiao Yu; Kim, Hoyeon; Giebink, Noel Christopher.

In: ACS Photonics, Vol. 6, No. 2, 20.02.2019, p. 308-313.

Research output: Contribution to journalArticle

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