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Kim MJ, Yoon TW, Lee J, Lee J, Kim H, Chung S, Cho K, Ham DS, Lee HC, Kang B. Disordered Phase-Assisted Growth of Organic Semiconductor Crystals on Self-Assembled Monolayer Templates. ACS APPLIED MATERIALS & INTERFACES 2023; 15:18144-18152. [PMID: 36995023 DOI: 10.1021/acsami.3c01797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Achieving high mobility and bias stability is a challenging obstacle in the advancement of organic thin-film transistors (OTFTs). To this end, the fabrication of high-quality organic semiconductor (OSC) thin films is critical for OTFTs. Self-assembled monolayers (SAMs) have been used as growth templates for high-crystalline OSC thin films. Despite significant research progress in the growth of OSC on SAMs, a detailed understanding of the growth mechanism of the OSC thin films on a SAM template is lacking, which has limited its use. In this study, the effects of the structure (thickness and molecular packing) of SAM on the nucleation and growth behavior of the OSC thin films were investigated. We found that disordered SAM molecules assisted in the surface diffusion of the OSC molecules and resulted in a small nucleation density and large grain size of the OSC thin films. Moreover, a thick SAM with disordered SAM molecules on the top was found to be beneficial for the high mobility and bias stability of the OTFTs.
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Affiliation(s)
- Min-Jae Kim
- SKKU Advanced Institute of Nanotechnology (SAINT) and Department of Nano Science and Technology, Sungkyunkwan University (SKKU), Suwon 16419, Korea
| | - Tae Woong Yoon
- SKKU Advanced Institute of Nanotechnology (SAINT) and Department of Nano Science and Technology, Sungkyunkwan University (SKKU), Suwon 16419, Korea
| | - Jaehoon Lee
- SKKU Advanced Institute of Nanotechnology (SAINT) and Department of Nano Science and Technology, Sungkyunkwan University (SKKU), Suwon 16419, Korea
| | - Jiyun Lee
- SKKU Advanced Institute of Nanotechnology (SAINT) and Department of Nano Science and Technology, Sungkyunkwan University (SKKU), Suwon 16419, Korea
| | - Hoimin Kim
- SKKU Advanced Institute of Nanotechnology (SAINT) and Department of Nano Science and Technology, Sungkyunkwan University (SKKU), Suwon 16419, Korea
| | - Sein Chung
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | - Kilwon Cho
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | - Dong Seok Ham
- Chemical Materials Solutions Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Korea
| | - Hyo Chan Lee
- Department of Chemical Engineering, Myongji University, Yongin 17058, Korea
| | - Boseok Kang
- SKKU Advanced Institute of Nanotechnology (SAINT) and Department of Nano Science and Technology, Sungkyunkwan University (SKKU), Suwon 16419, Korea
- Department of Nano Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Korea
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Jang YJ, Jung YE, Kwon EH, Lee CY, Park YD. Built-in Water Capture in a Polythiophene Film Blended with Metal-Organic Frameworks. Macromol Res 2019. [DOI: 10.1007/s13233-019-7081-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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