Large-Diameter Carbon Nanotube Transparent Conductor Overcoming Performance–Yield Tradeoff

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

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2022-03-09

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en

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Advanced Functional Materials

Abstract

The floating catalyst chemical vapor deposition (FCCVD) method for producing single-walled carbon nanotubes (SWNTs) has demonstrated great potential in transparent conductive film (TCF) application. In FCCVD, reducing the concentration of carbon nanotubes (CNTs) is a well-agreed method of improving the conductivity of SWNT TCF, achieved by producing thinner and longer CNT bundles. However, this method decreases the yield dramatically, which has persisted throughout the TCF development. Here, the production of large-diameter double-walled CNT (DWNT) TCFs via FCCVD is reported, which overcomes the tradeoff between performance and yield. These TCFs of DWNTs with an average diameter of approximate to 4 nm have a low sheet resistance of 35 omega sq(-1) at 90% transmittance. The conductivity here aligns with the best-performing SWNT TCFs reported to date, showing a production yield greater than two orders of magnitude. The main factor contributing to the high performance and yield is considered to be the large tube diameter, which greatly improves the yield threshold of CNT bundling and leads to long tube length and unique junctions broadening. Moreover, the application of DWNT TCFs in perovskite solar cells exhibits a power conversion efficiency of 17.4%, which has not been reported yet in indium-free CNT-based solar cells.

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Funding Information: Q.Z. and J.‐S.N. contributed equally to this work. The authors thank A. Sutorius for samples collection and Dr. J. D. Faveri for proof reading. This work made use of the Aalto University Nanomicroscopy Center (Aalto‐NMC) premises. Aalto NanoFab (Micronova) cleanroom resources are greatly appreciated. This work was supported by the Academy of Finland (Grant Numbers‐286546, 292600, 316572, 321443, and 328942), the National Research Foundation of Korea for Ministry of Science and ICT (MSIT) Korea (Grant Numbers, NRF2021R1C1C1009200, NRF‐2020R1A6A3A13075717, and NRF‐2018R1A5A1025594), JSPS KAKENHI (Grant Numbers‐JP18H05329 and JP20H00220), and JST CREST Japan (Grant Number‐JPMJCR20B5). This research was supported by 2020 BK21 FOUR Program of Pusan National University. Publisher Copyright: © 2021 The Authors. Advanced Functional Materials published by Wiley-VCH GmbH

Keywords

carbon nanotubes, large diameter, performance-yield tradeoff, perovskite solar cells, transparent conductive films

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Citation

Zhang, Q, Nam, J S, Han, J, Datta, S, Wei, N, Ding, E X, Hussain, A, Ahmad, S, Skakalova, V, Khan, A T, Liao, Y P, Tavakkoli, M, Peng, B, Mustonen, K, Kim, D, Chung, I, Maruyama, S, Jiang, H, Jeon, I & Kauppinen, E I 2022, ' Large-Diameter Carbon Nanotube Transparent Conductor Overcoming Performance–Yield Tradeoff ', Advanced Functional Materials, vol. 32, no. 11, 2103397 . https://doi.org/10.1002/adfm.202103397