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Copper coordination polymers with selective hole conductivity

Lookup NU author(s): Hannes Michaels, Dr Fabio Cucinotta, Dr Paul Waddell, Dr Mike ProbertORCiD, Dr Marina FreitagORCiD

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


Abstract

© 2022 The Royal Society of Chemistry. Emerging technologies in solar energy will be critical in enabling worldwide society in overcoming the present energy challenges and reaching carbon net zero. Inefficient and unstable charge transport materials limit the current emerging energy conversion and storage technologies. Low-dimensional coordination polymers represent an alternative, unprecedented class of charge transport materials, comprised of molecular building blocks. Here, we provide a comprehensive study of mixed-valence coordination polymers from an analysis of the charge transport mechanism to their implementation as hole-conducting layers. CuII dithiocarbamate complexes afford morphology control of 1D polymer chains linked by (CuI2X2) copper halide rhombi. Concerted theoretical and experimental efforts identified the charge transport mechanism in the transition to band-like transport with a modeled effective hole mass of 6me. The iodide-bridged coordination polymer showed an excellent conductivity of 1 mS cm−1 and a hole mobility of 5.8 10−4 cm2 (V s)−1 at room temperature. Nanosecond selective hole injection into coordination polymer thin films was captured by nanosecond photoluminescence of halide perovskite films. Coordination polymers constitute a sustainable, tunable alternative to the current standard of heavily doped organic hole conductors.


Publication metadata

Author(s): Michaels H, Golomb MJ, Kim BJ, Edvinsson T, Cucinotta F, Waddell PG, Probert MR, Konezny SJ, Boschloo G, Walsh A, Freitag M

Publication type: Article

Publication status: Published

Journal: Journal of Materials Chemistry A

Year: 2022

Volume: 10

Issue: 17

Pages: 9582-9591

Online publication date: 17/03/2022

Acceptance date: 14/03/2022

Date deposited: 03/05/2022

ISSN (print): 2050-7488

ISSN (electronic): 2050-7496

Publisher: Royal Society of Chemistry

URL: .DOI https://doi.org/10.1039/D2TA00267A

DOI: 10.1039/d2ta00267a


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Funding

Funder referenceFunder name
42037-1
43294-1
CY22240
EP/L000202
EP/V035819/1
EP/P020194/1
NRF-2020R1A6A3A03039130
URF\R1\191286
RGS\R1\211321

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