TY - JOUR
KW - Transmission electron microscopy
KW - Film
KW - Oxide
KW - Iron
KW - Absorption
KW - Oxygen
KW - Electric field
KW - Article
KW - Inorganic compound
KW - Electric conductivity
KW - Electrical equipment
KW - Optics
KW - Electrochrome
KW - Oxygen vacancy
AU - J Seidel
AU - W Luo
AU - S.J Suresha
AU - P.-K Nguyen
AU - A.S Lee
AU - S.-Y Kim
AU - C.-H Yang
AU - S.J Pennycook
AU - S.T Pantelides
AU - J.F Scott
AU - Ramamoorthy Ramesh
AB - Electrochromes are materials that have the ability to reversibly change from one colour state to another with the application of an electric field. Electrochromic colouration efficiency is typically large in organic materials that are not very stable chemically. Here we show that inorganic Bi 0.9Ca0.1FeO3-0.05 thin films exhibit a prominent electrochromic effect arising from an intrinsic mechanism due to the melting of oxygen-vacancy ordering and the associated redistribution of carriers. We use a combination of optical characterization techniques in conjunction with high-resolution transmission electron microscopy and first-principles theory. The absorption change and colouration efficiency at the band edge (blue-cyan region) are 4.8 × 106 m-1 and 190 cm2 C-1, respectively, which are the highest reported values for inorganic electrochromes, even exceeding values of some organic materials. © 2012 Macmillan Publishers Limited. All rights reserved.
BT - Nature Communications
DO - 10.1038/ncomms1799
LA - eng
N1 - cited By 32
N2 - Electrochromes are materials that have the ability to reversibly change from one colour state to another with the application of an electric field. Electrochromic colouration efficiency is typically large in organic materials that are not very stable chemically. Here we show that inorganic Bi 0.9Ca0.1FeO3-0.05 thin films exhibit a prominent electrochromic effect arising from an intrinsic mechanism due to the melting of oxygen-vacancy ordering and the associated redistribution of carriers. We use a combination of optical characterization techniques in conjunction with high-resolution transmission electron microscopy and first-principles theory. The absorption change and colouration efficiency at the band edge (blue-cyan region) are 4.8 × 106 m-1 and 190 cm2 C-1, respectively, which are the highest reported values for inorganic electrochromes, even exceeding values of some organic materials. © 2012 Macmillan Publishers Limited. All rights reserved.
PY - 2012
T2 - Nature Communications
TI - Prominent electrochromism through vacancy-order melting in a complex oxide
VL - 3
SN - 20411723
ER -