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Towards a Spectrally Customized Photoresponse from an Organic–Inorganic Hybrid Ferroelectric
Author(s) -
Ji Chengmin,
Liu Sijie,
Han Shiguo,
Tao Kewen,
Sun Zhihua,
Luo Junhua
Publication year - 2018
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201810698
Subject(s) - ferroelectricity , photosensitivity , materials science , photocurrent , optoelectronics , hybrid material , visible spectrum , absorption (acoustics) , curie temperature , optics , nanotechnology , dielectric , physics , quantum mechanics , ferromagnetism , composite material
Photosensitive organic–inorganic hybrid ferroelectrics are emerging as a new class of promising materials with a broad spectral response (e.g., visible light, UV light, and IR light) for optoelectronic applications. However, spectrally customized photoresponses in ferroelectrics have not been achieved. Herein, we report a photosensitive organic–inorganic hybrid ferroelectric, (diisobutylammonium) 3 ClCoCl 4 ( 1 ), with a notable spontaneous polarization of approximately 4.6 μC cm −2 and high Curie temperature ( T c =372.5 K). More interestingly, it features spectrally selective absorption at specific wave bands ranging from 550 to 700 nm with a large absorption coefficient, which was assigned to the d–d transition of Co 2+ from the 4 A 2 to the 4 T 1 (P) state. It is emphasized that 1 shows spectrally customized photosensitivity with distinct photocurrent generation under light illumination at 550–700 nm. This is the first hybrid photosensitive ferroelectric with a spectrally customized photoresponse. This finding should lead to innovative applications of hybrid photosensitive ferroelectrics, especially towards spectrally selective optoelectronic devices.