NIR-Selective electrochromic heteromaterial frameworks: a platform to understand mesoscale transport phenomena in solid-state electrochemical devices

Teresa E. Williams; Christina M. Chang; Evelyn L. Rosen; Guillermo Garcia; Evan L. Runnerstrom; Bradley L. Williams; Bonil Koo; Raffaella Buonsanti; Delia J. Milliron; Brett A. Helms

doi:10.1039/C3TC32247E

NIR-Selective electrochromic heteromaterial frameworks: a platform to understand mesoscale transport phenomena in solid-state electrochemical devices†

Teresa E. Williams,^ab Christina M. Chang,‡^a Evelyn L. Rosen,^a Guillermo Garcia,^c Evan L. Runnerstrom,^ad Bradley L. Williams,^a Bonil Koo,^c Raffaella Buonsanti,^ef Delia J. Milliron*^ag and Brett A. Helms*^a

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* Corresponding authors

^a The Molecular Foundry, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA
E-mail: bahelms@lbl.gov

^b Graduate Group in Applied Science and Technology, University of California, Berkeley, CA 94720, USA

^c Heliotrope Technologies, 2625 Alcatraz Ave #377, Berkeley, CA 94705, USA

^d Department of Materials Science and Engineering, University of California, Berkeley, CA 94720, USA

^e Joint Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory, 2929 7th Street, Berkeley, CA 94710, USA

^f Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA

^g Department of Chemical Engineering, The University of Texas at Austin, 200 E. Dean Keeton Street, Austin, TX 78712, USA
E-mail: milliron@che.utexas.edu

Abstract

We report here the first solid-state, NIR-selective electrochromic devices. Critical to device performance is the arrangement of nanocrystal-derived electrodes into heteromaterial frameworks, where hierarchically porous ITO nanocrystal active layers are infiltrated by an ion-conducting polymer electrolyte with mesoscale periodicity. Enhanced coloration efficiency and transport are realized over unarchitectured electrodes in devices, paving the way towards new smart windows technologies.

This article is part of the themed collection: Emerging Investigators

Journal of Materials Chemistry C

NIR-Selective electrochromic heteromaterial frameworks: a platform to understand mesoscale transport phenomena in solid-state electrochemical devices†

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NIR-Selective electrochromic heteromaterial frameworks: a platform to understand mesoscale transport phenomena in solid-state electrochemical devices

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