Issue 10, 2021

Pentafluorophenyl substituted fulleropyrrolidine: a molecule enabling the most efficient flexible electrochromic device with fast switching

Abstract

A fullerene derivative, namely pentafluorophenyl-substituted fulleropyrrolidine (PSF), has been synthesized and reported for application in electrochromic devices as a counter ion electrode material. A polythiophene-based solid-state electrochromic device thus prepared, using the PSF counter ion, breaks the millisecond electrochromic switching limit (300 ms) and presents the most efficient thiophene-based electrochromic device with an efficiency of more than 400 cm2 C−1. Due to its solution processibility and polymer compatibility, a flexible device was also fabricated that makes it possible to realize the most efficient all-organic flexible solid-state electrochromic device. A color contrast of more than 60% between the magenta and transparent states can be achieved with a small bias of ∼±1 V, as observed from the investigation using UV-vis spectroscopy. The PSF counter ion excellently supports the bias-induced absorption change of poly(3-hexylthiophene-2,5-diyl) (P3HT), which has been investigated using in situ Raman spectroscopy. Additionally, electron transport mechanism in the PSF-P3HT device is improved due to addition of PSF. This makes an ultrafast, durable, and power efficient device with a switching speed of the order of milliseconds possible while maintaining an impressive durability in switching cycles for longer than 500 switching pulses. The performance of the device in its flexible form also remains unaltered even after more than 100 bending cycles.

Graphical abstract: Pentafluorophenyl substituted fulleropyrrolidine: a molecule enabling the most efficient flexible electrochromic device with fast switching

Supplementary files

Article information

Article type
Paper
Submitted
21 out 2020
Accepted
27 jan 2021
First published
27 jan 2021

J. Mater. Chem. C, 2021,9, 3462-3469

Pentafluorophenyl substituted fulleropyrrolidine: a molecule enabling the most efficient flexible electrochromic device with fast switching

A. Chaudhary, G. Sivakumar, D. K. Pathak, M. Tanwar, R. Misra and R. Kumar, J. Mater. Chem. C, 2021, 9, 3462 DOI: 10.1039/D0TC04991C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements