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Title: Electrochromic window with high reflectivity modulation

Abstract

A multi-layered, active, thin film, solid-state electrochromic device having a high reflectivity in the near infrared in a colored state, a high reflectivity and transmissivity modulation when switching between colored and bleached states, a low absorptivity in the near infrared, and fast switching times, and methods for its manufacture and switching are provided. In one embodiment, a multi-layered device comprising a first indium tin oxide transparent electronic conductor, a transparent ion blocking layer, a tungsten oxide electrochromic anode, a lithium ion conducting-electrically resistive electrolyte, a complimentary lithium mixed metal oxide electrochromic cathode, a transparent ohmic contact layer, a second indium oxide transparent electronic conductor, and a silicon nitride encapsulant is provided. Through elimination of optional intermediate layers, simplified device designs are provided as alternative embodiments. Typical colored-state reflectivity of the multi-layered device is greater than 50% in the near infrared, bleached-state reflectivity is less than 40% in the visible, bleached-state transmissivity is greater than 60% in the near infrared and greater than 40% in the visible, and spectral absorbance is less than 50% in the range from 0.65-2.5 .mu.m.

Inventors:
 [1];  [2];  [3];  [4];  [5]
  1. Lexington, MA
  2. Medford, MA
  3. Arlington, MA
  4. Cambridge, MA
  5. Southborough, MA
Publication Date:
Research Org.:
Tufts University
OSTI Identifier:
873118
Patent Number(s):
US 6094292
Assignee:
Trustees of Tufts College (Medford, MA)
DOE Contract Number:  
FG02-95ER14578
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
electrochromic; window; reflectivity; modulation; multi-layered; active; film; solid-state; device; near; infrared; colored; transmissivity; switching; bleached; absorptivity; fast; times; methods; manufacture; provided; embodiment; comprising; indium; oxide; transparent; electronic; conductor; blocking; layer; tungsten; anode; lithium; conducting-electrically; resistive; electrolyte; complimentary; mixed; metal; cathode; ohmic; contact; silicon; nitride; encapsulant; elimination; optional; intermediate; layers; simplified; designs; alternative; embodiments; typical; colored-state; 50; bleached-state; 40; visible; 60; spectral; absorbance; range; 65-2; electrically resistive; intermediate layers; alternative embodiments; contact layer; near infrared; indium oxide; mixed metal; silicon nitride; metal oxide; device comprising; intermediate layer; ohmic contact; alternative embodiment; electronic conductor; electrochromic device; tungsten oxide; transparent ohmic; electrochromic window; /359/427/

Citation Formats

Goldner, Ronald B, Gerouki, Alexandra, Liu, Te-Yang, Goldner, Mark A, and Haas, Terry E. Electrochromic window with high reflectivity modulation. United States: N. p., 2000. Web.
Goldner, Ronald B, Gerouki, Alexandra, Liu, Te-Yang, Goldner, Mark A, & Haas, Terry E. Electrochromic window with high reflectivity modulation. United States.
Goldner, Ronald B, Gerouki, Alexandra, Liu, Te-Yang, Goldner, Mark A, and Haas, Terry E. 2000. "Electrochromic window with high reflectivity modulation". United States. https://www.osti.gov/servlets/purl/873118.
@article{osti_873118,
title = {Electrochromic window with high reflectivity modulation},
author = {Goldner, Ronald B and Gerouki, Alexandra and Liu, Te-Yang and Goldner, Mark A and Haas, Terry E},
abstractNote = {A multi-layered, active, thin film, solid-state electrochromic device having a high reflectivity in the near infrared in a colored state, a high reflectivity and transmissivity modulation when switching between colored and bleached states, a low absorptivity in the near infrared, and fast switching times, and methods for its manufacture and switching are provided. In one embodiment, a multi-layered device comprising a first indium tin oxide transparent electronic conductor, a transparent ion blocking layer, a tungsten oxide electrochromic anode, a lithium ion conducting-electrically resistive electrolyte, a complimentary lithium mixed metal oxide electrochromic cathode, a transparent ohmic contact layer, a second indium oxide transparent electronic conductor, and a silicon nitride encapsulant is provided. Through elimination of optional intermediate layers, simplified device designs are provided as alternative embodiments. Typical colored-state reflectivity of the multi-layered device is greater than 50% in the near infrared, bleached-state reflectivity is less than 40% in the visible, bleached-state transmissivity is greater than 60% in the near infrared and greater than 40% in the visible, and spectral absorbance is less than 50% in the range from 0.65-2.5 .mu.m.},
doi = {},
url = {https://www.osti.gov/biblio/873118}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {1}
}

Works referenced in this record:

Fundamentals of electrochromism in metal oxide bronzes
conference, August 2017


Electrochromic behavior in ITO and related oxides
journal, January 1985


High near‐infrared reflectivity modulation with polycrystalline electrochromic WO 3 films
journal, December 1983


Electrochromic materials for controlled radiant energy transfer in buildings
journal, November 1984


The Preparation and Characterization of Lithium Cobalt Oxide thin Films by LPCVD
journal, January 1995


Improved Colored State Reflectivity In Lithiated WO 3 Films
conference, November 1987


Prototype All-Solid Lithiated Smart Window Devices
conference, November 1987


Some lessons learned from research on a thin film electrochromic window
journal, May 1994


Characterization Technique For Transparent Ion Conducting Films
conference, November 1987


Attaining a solar energy economy with active thin film structures
journal, May 1995


Recent research related to the development of electrochromic windows
journal, November 1986


Density of States Calculations of Small Diameter Single Graphene Sheets
journal, January 1996


Thin films of lithium cobalt oxide
journal, November 1992


A Transient Method for Measuring Diffusion Coefficients of Thin Film Battery Electrodes: Results for and Thin Films
journal, January 1996


A monolithic thin-film electrochromic window
journal, July 1992


Progress on the variable reflectivity electrochromic window
conference, December 1991


Optical frequencies free electron scattering studies on electrochromic materials for variable reflectivity windows
journal, December 1985


Structural Considerations of Layered and Spinel Lithiated Oxides for Lithium Ion Batteries
journal, January 1995


A Study of the Optical Band Gap of Lithium Tungsten Trioxide Thin Films
journal, January 1990


Further evidence for free electrons as dominating the behavior of electrochromic polycrystalline WO 3 films
journal, September 1985


Electrochromic Crystalline WO 3 Films Prepared At Ambient Temperature By Ion Assisted Deposition
conference, December 1989