Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Synthesis and Photovoltaic Properties of Conducting Polymers Based on Phenothiazine

Phenothiazine계 전도성고분자의 합성 및 유기박막태양전지로의 적용 연구

  • Yoo, Han-Sol (Department of Industrial Chemistry, Sangmyung University) ;
  • Park, Yong-Sung (Department of Industrial Chemistry, Sangmyung University)
  • Published : 2013.02.10
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Abstract

In this paper, four conducting polymers (poly[(N-butyl-phenothiazine)-sulfide] (PBPS), poly[(N-hexyl-phenothiazine)-sulfide] (PHPS), poly[(N-decyl-phenothiazine)-sulfide] (PDPS), and poly[(N-(2-ethylhexyl)-phenothiazine)-sulfide] (PEHPS)) were synthesized with a high temperature and high pressure reaction. The structures of synthesized polymers were confirmed by $^1H-NMR$ and characterized by UV-Vis, cyclic voltammetry, and GPC. From the UV-Vis absorption spectra, the ${\lambda}_{max}$ values of PBPS, PHPS, PDPS, and PEHPS were 338, 341, 340, and 334 nm, respectively and their optical band gaps were 3.11, 3.13, 3.16, and 3.05 eV, respectively. To evaluate the feasible applicability as a photovoltaic cell, the devices composed of for example, ITO/PEDOT : PSS/polymer (PBPS, PDPS) : $PC_{71}BM$ (1 : 3, w/w)/$BaF_2$/Ba/Al were fabricated using the blends of the PBPS and PDPS as a donor, and $PC_{71}BM$ as an acceptor. Then, the power conversion efficiencies (PCE) of devices were estimated as 0.076% of PBPS and 0.136% of PDPS by solar simulator.

본 연구에서는 고온 고압반응을 통하여 4종의 전도성 고분자 poly[(N-butyl-phenothiazine)-sulfide] (PBPS), poly[(N-hexyl-phenothiazine)-sulfide] (PHPS), poly[(N-decyl-phenothiazine)-sulfide] (PDPS), poly[(N-(2-ethylhexyl)-phenothiazine)-sulfide] (PEHPS)를 합성하였다. 각 단계의 합성된 화합물의 구조는 $^1H-NMR$을 통하여 확인하였고, UV-Vis, cyclic voltammetry, GPC를 이용하여 합성된 고분자의 물성을 확인하였다. PBPS, PHPS, PDPS, PEHPS의 최대흡수파장은 각각 338, 341, 340, 334 nm이었으며, 각 고분자의 광학적 밴드 갭은 3.11, 3.13, 3.16, 3.05 eV이었다. 유기박막태양전지로서의 적용가능성을 확인하기 위해 합성된 고분자를 전자 받개 물질인 $PC_{71}BM$과 블렌딩하여 ITO/PEDOT : PSS/polymer (PBPS, PDPS) : $PC_{71}BM$ (1 : 3, w/w)/$BaF_2$/Ba/Al 구조의 소자를 제작하였고, solar simulator로 광전변환효율을 측정하였다. PBPS의 광전변환효율은 0.076%이었고, PDPS의 광전변환효율은 0.136%이었다.

Keywords

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