Giant Optical Anisotropy of Perovskite Nanowire Array Films

Chun Ho Lin, Chieh Yu Kang, Ting Zhu Wu, Chun Lin Tsai, Chin Wei Sher, Xinwei Guan, Po Tsung Lee, Tom Wu, Chih Hsiang Ho*, Hao Chung Kuo*, Jr Hau He*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Polarizers play a key role in generating polarized light for display, imaging, and data communication, but adoption often suffers from high optical loss. Recently, due to superior optoelectronic properties, halide perovskites have been widely developed for lighting applications; however, highly polarized emission (polarization degree >0.8) has not yet been realized with perovskites. Herein, by incorporating inkjet printing and an anodic aluminum oxide (AAO) confinement strategy, highly ordered perovskite nanowire (NW) arrays are demonstrated for anisotropic optical applications. The optical device based on perovskite NW arrays reveals a high photoluminescence external quantum efficiency of 21.6% and emits highly polarized light with polarization degree up to 0.84. The highly polarized emission from perovskite NW arrays has potential to considerably reduce the optical loss of polarizers, which may attract great interest in developing polarized light sources for next-generation optoelectronic applications.

Original languageEnglish
Article number1909275
JournalAdvanced Functional Materials
DOIs
StatePublished - 3 Apr 2020

Keywords

  • anisotropic applications
  • anisotropic polarization
  • light emission
  • perovskite nanowire array films

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