Electrochromic Inorganic Nanostructures with High Chromaticity and Superior Brightness
Journal article, 2021

The possibility of actively controlling structural colors has recently attracted a lot of attention, in particular for new types of reflective displays (electronic paper). However, it has proven challenging to achieve good image quality in such devices, mainly because many subpixels are necessary and the semitransparent counter electrodes lower the total reflectance. Here we present an inorganic electrochromic nanostructure based on tungsten trioxide, gold, and a thin platinum mirror. The platinum reflector provides a wide color range and makes it possible to "reverse"the device design so that electrolyte and counter electrode can be placed behind the nanostructures with respect to the viewer. Importantly, this makes it possible to maintain high reflectance regardless of how the electrochemical cell is constructed. We show that our nanostructures clearly outperform the latest commercial color e-reader in terms of both color range and brightness.

Tungsten trioxide

Reflective displays

Fabry-Pérot cavity

Electrochromism

Author

Marika Gugole

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

Oliver Olsson

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

Stefano Rossi

Linköping University

Martin Jonsson

Linköping University

Andreas Dahlin

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

Nano Letters

1530-6984 (ISSN) 1530-6992 (eISSN)

Vol. 21 10 4343-4350

Subject Categories

Media and Communication Technology

Human Computer Interaction

Media Engineering

DOI

10.1021/acs.nanolett.1c00904

PubMed

33969987

More information

Latest update

6/11/2021