In-depth studies on rapid photochemical activation of various sol-gel metal oxide films for flexible transparent electronics

Sungjun Park, Kwang Ho Kim, Jeong Wan Jo, Sujin Sung, Kyung Tae Kim, Won June Lee, Jaekyun Kim, Hyun Jae Kim, Gi Ra Yi, Yong Hoon Kim, Myung Han Yoon, Sung Kyu Park

Research output: Contribution to journalArticle

92 Citations (Scopus)

Abstract

Despite intensive research on photochemical activation of sol-gel metal oxide materials, the relatively long processing time and lack of deep understanding of the underlying chemical courses have limited their broader impact on diverse materials and applications such as thin-film electronics, photovoltaics, and catalysts. Here, in-depth studies on the rapid photochemical activation of diverse sol-gel oxide films using various spectroscopic and electrical investigations for the underlying physicochemical mechanism are reported. Based on the exhaustive chemical and physical analysis, it is noted that deep ultraviolet-promoted rapid film formation such as densification, polycondensation, and impurity decomposition is possible within 5 min via in situ radical-mediated reactions. Finally, the rapid fabrication of all-solution metal oxide thin-film-transistor circuitry, which exhibits stable and reliable electrical performance with a mobility of >12 cm2 V-1 s-1 and an oscillation frequency of >650 kHz in 7-stage ring oscillator even after bending at a radius of <1 mm is demonstrated. The general physicochemical mechanisms underlying photoactivated sol-gel reactions are described, with comprehensive chemical and structural analysis inducing rapid (<5 min) fabrication of various metal oxide films at low temperatures (<150 C), and all-solution processed high-performance electronic devices and circuitry on ultrathin polymeric substrates are demonstrated. This will open new possibilities to prepare future electronic materials in a fast, scalable, and economic manner.

Original languageEnglish
Pages (from-to)2807-2815
Number of pages9
JournalAdvanced Functional Materials
Volume25
Issue number19
DOIs
Publication statusPublished - 2015 May 1

Fingerprint

Oxide films
Sol-gels
metal oxides
oxide films
Electronic equipment
Metals
Chemical activation
gels
activation
chemical analysis
electronics
Fabrication
fabrication
Thin film transistors
Polycondensation
densification
thin films
Densification
structural analysis
Structural analysis

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Park, Sungjun ; Kim, Kwang Ho ; Jo, Jeong Wan ; Sung, Sujin ; Kim, Kyung Tae ; Lee, Won June ; Kim, Jaekyun ; Kim, Hyun Jae ; Yi, Gi Ra ; Kim, Yong Hoon ; Yoon, Myung Han ; Park, Sung Kyu. / In-depth studies on rapid photochemical activation of various sol-gel metal oxide films for flexible transparent electronics. In: Advanced Functional Materials. 2015 ; Vol. 25, No. 19. pp. 2807-2815.
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abstract = "Despite intensive research on photochemical activation of sol-gel metal oxide materials, the relatively long processing time and lack of deep understanding of the underlying chemical courses have limited their broader impact on diverse materials and applications such as thin-film electronics, photovoltaics, and catalysts. Here, in-depth studies on the rapid photochemical activation of diverse sol-gel oxide films using various spectroscopic and electrical investigations for the underlying physicochemical mechanism are reported. Based on the exhaustive chemical and physical analysis, it is noted that deep ultraviolet-promoted rapid film formation such as densification, polycondensation, and impurity decomposition is possible within 5 min via in situ radical-mediated reactions. Finally, the rapid fabrication of all-solution metal oxide thin-film-transistor circuitry, which exhibits stable and reliable electrical performance with a mobility of >12 cm2 V-1 s-1 and an oscillation frequency of >650 kHz in 7-stage ring oscillator even after bending at a radius of <1 mm is demonstrated. The general physicochemical mechanisms underlying photoactivated sol-gel reactions are described, with comprehensive chemical and structural analysis inducing rapid (<5 min) fabrication of various metal oxide films at low temperatures (<150 C), and all-solution processed high-performance electronic devices and circuitry on ultrathin polymeric substrates are demonstrated. This will open new possibilities to prepare future electronic materials in a fast, scalable, and economic manner.",
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Park, S, Kim, KH, Jo, JW, Sung, S, Kim, KT, Lee, WJ, Kim, J, Kim, HJ, Yi, GR, Kim, YH, Yoon, MH & Park, SK 2015, 'In-depth studies on rapid photochemical activation of various sol-gel metal oxide films for flexible transparent electronics', Advanced Functional Materials, vol. 25, no. 19, pp. 2807-2815. https://doi.org/10.1002/adfm.201500545

In-depth studies on rapid photochemical activation of various sol-gel metal oxide films for flexible transparent electronics. / Park, Sungjun; Kim, Kwang Ho; Jo, Jeong Wan; Sung, Sujin; Kim, Kyung Tae; Lee, Won June; Kim, Jaekyun; Kim, Hyun Jae; Yi, Gi Ra; Kim, Yong Hoon; Yoon, Myung Han; Park, Sung Kyu.

In: Advanced Functional Materials, Vol. 25, No. 19, 01.05.2015, p. 2807-2815.

Research output: Contribution to journalArticle

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AU - Kim, Kwang Ho

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AU - Kim, Kyung Tae

AU - Lee, Won June

AU - Kim, Jaekyun

AU - Kim, Hyun Jae

AU - Yi, Gi Ra

AU - Kim, Yong Hoon

AU - Yoon, Myung Han

AU - Park, Sung Kyu

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