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Wide‐Band Reflection‐Type, All‐Solid‐State Switchable Mirror Composed of WO 3 –Mg 4 Ni Thin Films and Proton‐Conductive Polymer Electrolytes
Author(s) -
Li Ning,
Bao Shanhu,
Zhang Qixuan,
Xie Lingling,
Jin Ping
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201800299
Subject(s) - materials science , electrochromism , nafion , thin film , electrochromic devices , electrolyte , fast ion conductor , sputtering , layer (electronics) , non blocking i/o , sputter deposition , electrical conductor , optoelectronics , chemical engineering , nanotechnology , composite material , electrochemistry , electrode , organic chemistry , chemistry , engineering , catalysis
In all‐solid‐state devices based on WO 3 –NiO thin films, solid electrolytes such as Ta 2 O 5 or Nb 2 O 5 are usually used as the ion conducting layers. However, the thickness of the proton conducting layer of Ta 2 O 5 or Nb 2 O 5 is thicker, and the sputtering rate is low, which affects the cost and practical application of the devices. In this paper, a wide‐band reflection‐type all‐solid‐state WO 3 –Mg 4 Ni thin film switchable mirror was fabricated by using an assemble process and a proton‐conductive Nafion membrane was used as a solid electrolyte for the first time. WO 3 is an ideal discoloration material in all‐solid‐state electrochromic devices, whereas Pd/Mg 4 Ni is a reflective switching material. WO 3 and Pd/Mg 4 Ni thin films were deposited on ITO‐coated glass and glass substrates, respectively, by DC magnetron sputtering. The device was assembled by two separated thin films using a poly vinyl butyral (PVB) glue containing a proton‐conductive Nafion as the electrolyte. The fabricated all‐solid‐state mirror could be reversibly switched between the mirror and transparent state by applying different voltages. The influences of the Nafion concentration and applied power on the switching properties were investigated.