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Giant Optical Anisotropy of Perovskite Nanowire Array Films
Author(s) -
Lin ChunHo,
Kang ChiehYu,
Wu TingZhu,
Tsai ChunLin,
Sher ChinWei,
Guan Xinwei,
Lee PoTsung,
Wu Tom,
Ho ChihHsiang,
Kuo HaoChung,
He JrHau
Publication year - 2020
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201909275
Subject(s) - polarizer , materials science , optoelectronics , nanowire , perovskite (structure) , polarization (electrochemistry) , photoluminescence , anisotropy , halide , electroluminescence , quantum dot , light emission , optics , nanotechnology , birefringence , layer (electronics) , inorganic chemistry , chemistry , physics , chemical engineering , engineering
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.