서로 다른 위치 규칙성을 가지는 두 개의 Poly(3-hexylthiophene) 공액 고분자를 기반으로 한 고분자 복합 박막의 구조와 전기적 특성에 대한 연구
Study on the Morphologies and Electrical Properties in Polymer Blend Thin-Films Based on Two Poly(3-hexylthiophene) Conjugated Polymers with Different Regio-regularities
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
Poly(3-hexlythiophene) (P3HT)는 유기 용매에서 높은 용해도를 가지고 있으면서 상대적으로 쉽게 구할 수 있는 공액 고분자 중 하나이다. 그러나, 전자소자의 활성 소재로써 전기적 특성은 실제로 응용하기에는 부족하므로 추가 개선이 필요하다. 본 연구에서는, 서로 다른 위치 규칙성 (regio-regularity)을 가지는 두 P3HT 고분자 (즉, regio-regular (RR) P3HT 및 regio-random (RRa) P3HT)를 혼합하여 혼합 박막의 전하 전달 특성을 크게 향상시킬 수 있음을 보여준다. 두 P3HT 고분자 간 비율을 변화시킴으로써 혼합 박막의 구조적 및 전기적 특성을 체계적으로 조사하였으며, 원자 힘 현미경(AFM), X선 회절(XRD) 및 UV-vis 흡수분광법을 사용하여 혼합 필름의 구조 및 광전자적 특성을 평가하였다. 혼합 박막의 결정성은 RRa-P3HT 함량이 20wt%로 증가함에 따라 증가하였으며, 이후 80%까지 증가함에 따라 감소하였다. 전하 이동도의 경향성 또한 이와 같았으며, 20wt%의 RRa-P3HT를 포함하는 혼합 박막의 전하 이동도는 가장 높은 0.029 cm²/V·s로 측정되었고 함량이 80wt%까지 증가함에 따라 0.0007 cm²/V·s 로 감소하였다.
Abstract
Poly(3-hexylthiophene) (P3HT) is a conjugated polymer that is highly soluble in organic solvents and is readily available. However, its electrical properties as an active channel in electronic devices are not enough for practical applications, necessitating further improvement in the properties. In this study, we demonstrate that the blending of two P3HT polymers (i.e., regio-regular (RR) P3HT and regio-random (RRa) P3HT) with different regio-regularities can significantly improve charge transport characteristics of the blend films. The morphological and electrical properties of the blend films were systematically investigated by varying the ratio between two P3HT polymers. Atomic force microscopy (AFM), X-ray diffraction (XRD), and UV-visible absorption spectroscopy (UV-vis) were employed to evaluate the morphological and optoelectronic properties of the blend films. The crystallinity of the blend films increased with increasing the content of RRa-P3HT to 20wt% and gradually decreased as the content increased to 80%. Consistently, the highest charge carrier mobility was obtained from the blend films containing 20wt% RRa-P3HT, which value was measured to be 0.029 cm²/V·s. The values gradually decreased to 0.0007 cm²/V·s with increasing the content of RRa-P3HT to 80wt%.
참고문헌 (16)
- Folorunso, O., "Conductive Polymers’ Electronic Structure Modification for Multifunctional Applications", Materials Today Communications, 35, pp.106308~ (2023)
- Sharma, S., "Recent Trends and Developments in Conducting Polymer Nanocomposites for Multifunctional Applications", Polymers, 13, pp.2898~ (2021)
- Parmeggiani, M., "P3HT Processing Study for In-liquid EGOFET Biosensors : Effects of the Solvent and the Surface", Sensors, 19, pp.4497~ (2019)
- Cao, Z., "TFT-CN", P3HT Blending Active Layer Based Two-component Organic Field-effect Transistor for Improved H2S Gas Detection, 2023, pp.385, 133685~
- Kim, H. J., "Regioregularity Controlled Phase Behavior for Poly(3-hexylthiophene) : A Combined Study of Simple Coarse-grained Simulation and Experiment", Polymer, 178, pp.121569~ (2019)
- Cruz, R., "Absolute Photoluminescence Quantum Efficiency of P3HT", CHCl3 Solution by Thermal Lens Spectrometry, 2013, pp.163, 38~41
- Chang, M., "Photoinduced Anisotropic Assembly of Conjugated Polymers in Insulating Polymer Blends", ACS Applied Materials & Interfaces, 7, pp.14095~14103 (2015)
- Tazuhara, S., "Understanding the Influence of Contact Resistances on Short-channel High-mobility Organic Transistors in Linear and Saturation Regimes", Applied Physics Express, 14, pp.041010~ (2021)
- Bhatt, T., "Computational Study of the Intermolecular Interactions and Their Effect on the UV-visible Spectra of the Ternary Liquid Mixture of Benzene, Ethanol and Propylene Glycol", Journal of Molecular Modeling, 26 (2020)
- Jeong, G., "Thermal Annealing Effects on the Morphology and Charge Transport of Polymer Semiconductor Nanowires Aligned in an Insulating Polymer Matrix", Dyes and Pigments, 185, pp.108962~ (2021)
- Geisse, N. A., "AFM and Combined Optical Techniques", Materials Today, 12, pp.40~45 (2009)
- He, K., "Method for Determining Crystal Grain Size by X-ray Diffraction", Crystal Research and Technology, 53, pp.1700157~ (2018)
- Kim, Y. J., "Simultaneously Induced Self-assembly of Poly(3-hexylthiophene)(P3HT)Nanowires and Thin-film Fabrication via Solution-floating Method on a Water Substrate", Advanced Materials Interfaces, 4, pp.1700342~ (2017)
- Jo, G., "Controlled Self-assembly of Polymer Semiconductors in Solution Using a Solvent-vapor Approach", Modern Physics Letters B, 33, pp.1940038~ (2019)
- Liu, J., "Suppression of Phase Separation for Exclusive Stereocomplex Crystallization of a Highmolecular-weight Racemic Poly(l-lactide)", Poly(d-lactide)Blend from the Glassy State, 2020, pp.53, 3493~3503
- Chu, P. H., "Synergistic Effect of Regioregular and Regiorandom Poly(3-hexylthiophene)Blends for High Performance Flexible Organic Field Effect Transistors", Advanced Electronic Materials, 2, pp.1500384~ (2016)