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Effect of poly(4-vinylpyridine) derivatives as the interfacial layer on the photovoltaic properties
( Mutia Anissa Marsya ),( Nadhila Sylvianti ),김윤환,안병현,김주현 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.0
The charge injecting/collecting properties are related to the interfacial properties between the semiconducting layer and the cathode or the anode. Conjugated polymer electrolytes, alcohol-soluble neutral conjugated polymers have been mainly applied to the solution processable cathode interface layer of organic electronic devices. In this presentation, new type of interfacial layer material based on zwitterionic poly(4-vinylpyridine) derivative for the applications in organic solar cells will be introduced. Also, we will present the effect of the zwitterionic poly(4-vinylpyridine) derivative on the photovoltaic properties.
Effect of conformation of CPEs` backbone as the cathode buffer layer on the photovoltaic properties
( Mutia Anissa Marsya ),( Nadhila Sylvianti ),김윤환,안병현,김주현 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.0
conjugated polyelectrolytes (CPEs) are generally known to modify the work function of electrode due to induced interfacial dipole at the interfaces. Another role of CPEs, we suggest that the effect of conformation of CPEs on the performances. To compare the effect of conformation, we polymerized CPEs, salts of which are sequence or alternate on the end of side chain in same backbone. And we fabricated PSCs based on CPEs to investigate an influence of conformation. In this presentation, we will discuss the effect of conformation of CPEs on the device performances of photovoltaic devices.
Fluorene-thiophene derived conjugated oligomer and polymer for efficient organic solar cell
( Mutia Anissa Marsya ),김윤환,( Nadhila Sylvianti ),김주현 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.0
Fluorene-thiophene derived conjugated oligomer and polymer, namely, 2,5-bis-[9,9-bis-(6-bromo-hexyl)-9H-fluoren-2-yl]-thiophene (FTF) and poly2-[9,9-bis-(6-bromo-hexyl)-9H-fluoren-2-yl]-thiophene (PFT) were prepared by the Suzuki coupling reaction. FTF and PFT can be easily converted to quaternary ammonium salt by the treatment of trimethylamine, which are very good soluble in protic solvent such as methanol, ethanol, and so on. Quaternarized PFT and FTF can be used as the cathode buffer layer. In this presentation, we present synthesis, the electrical and optical properties of the conjugated oligomer. In addition, we investigate the effect of PFT and FTF as the cathode buffer layer on the photovoltaic properties.
Effect of the size of counteranion of polyviologen on the properties of polymer solar cells
김윤환,( Mutia Anissa Marsya ),( Nadhila Sylvianti ),김주현 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.0
To improve performances of the polymer solar cells (PSCs), one of the potential methods is the introduction of an interfacial layer between the active layer and the metal cathode. Electron injection barrier and the electrical contact resistance can be reduced by a thin layer of interfacial layer. We have reported the photovoltaic properties of the polymer solar cells with the polyviologen as an interfacial layer for polymer solar cells. Herein, we report the photovoltaic properties of the devices with polyviologen with different counter anion as an interfacial layer.
Synthesis and characterization conjugated oligomer based on phenothiazine derivative
Sylvianti, Nadhila,Marsya, Mutia Anissa,Kim, Youn Hwan,Park, Chan-Young,Chang, Dong Wook,Moon, Doo Kyung,Kim, Joo Hyun Informa UK (TaylorFrancis) 2017 Molecular Crystals and Liquid Crystals Vol.653 No.1
<P>An acceptor-donor-acceptor (A-D-A) type oligomer based on benzothiadiazole and phenothiazine, 3,7-bis-[5-(7-methyl-benzo[1,2,5]thiadiazol-4-yl)-thiophen-2-yl]-10-(2-octyl-dodecyl)-10H-phenothiazine (PTBT), is synthesized by the Suzuki Coupling reaction. In addition, we introduce thiophene (T) ring as a -bridge to extend the effective conjugation length. To investigate the effect of combination between strong electron donor and strong electron withdrawing on the diverse properties of conjugated oligomer on PTBT, optical and electrochemical properties are examined using UV-Vis absorption spectra and cyclic volatommograms (CV) that revealing HOMO/LUMO level at -5.36eV/-3.18eV with an optical band gap of 2.18eV, respectively. Inverted-type organic solar cells (OSCs) with a configuration of ITO/ZnO/PTBT:PC71BM/MoO3/Al are fabricated. Maximum power conversion efficiency of the organic solar cells (OSCs) based on PTBT is showed up to 0.44% with a short-circuit current density (J(sc)) of - 1.63mA/cm(2), V-oc of 0.87V, and fill factor (FF) of 30.9%.</P>
김윤환,( Nadhila Sylvianti ),( Mutia Anissa Marsya ),김주현 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.0
유기태양전지의 효율을 향상시키는 방법으로 활성층의 morphology 조절, 전극과 활성층 사이 새로운 층의 도입 및 각 층의 계면 조절 등의 방법이 있다. 이 중 본 연구실에서는 ZnO(ETL)층과 활성층 사이에 Viologen 유도체를 계면층으로 도입하여 유기태양전지의 효율을 향상시키는 연구를 수행하였다. 본 연구에서는 알킬기에 수산화기로 치환된 Viologen 유도체를 합성하였는데, 이 수산화기는 ZnO층과 활성층 사이에 interface dipole을 유발시킨다. 이 interface dipole은 ZnO층에 반대방향으로 생성되어 ZnO층의 일함수를 증가시키게 되므로 전자가 이동하기 쉽게 된다. 본 발표에서는 이러한 Viologen 유도체를 적용한 유기태양전지의 특성을 논의 하려고 한다.
Cathode modification of polymer solar cells by ultrahydrophobic polyelectrolyte
Shin, Woong,Sylvianti, Nadhila,Marsya, Mutia Anissa,Putri, Devi Saskia,Chang, Dong Wook,Kim, Ju-Hyung,Kim, Youn Whan,Kim, Tae-Dong,Yoo, Seong Il,Kim, Joo Hyun Informa UK (TaylorFrancis) 2016 Molecular Crystals and Liquid Crystals Vol.635 No.1
<P>A ultrahydrophobic polylectrolyte (PVPy-F) based on poly(4-vinylpyridine) is applied to polymer solar cell (PSC) as a cathode buffer layer. The Kelvin probe microscopy measurement support the formation of favorable interface dipole between the active layer and the cathode. PSC with the PVPy-F as a cathode buffer layer demonstrate the power conversion efficiency (PCE) of 3.46% (open circuit voltage (V-oc) = 0.62V, short circuit current (J(sc)) = 10.8mA/cm(2), fill factor (FF) = 51.7%), which is better than the device without interlayer (PCE = 2.88%, V-oc = 0.61V, J(sc) = 9.15mA/cm(2), FF = 51.6%). This is due to that the reduction of a Schottky barrier at the cathode interface. Most increase in the PCE of the devices with interlayer is resulted from enhancement of the J(sc).</P>
Polymer electrolytes and polymer solar cells for flexible electronics
김주현,( Nadhila Sylvianti ),김윤환,( Mutia Anissa Marsya ) 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.0
Opto-electronic devices based on conjugated polymers have received attention over the past decades. The charge transporting and injecting/collecting properties are crucial factors for improving the performances of the devices. Among them, the charge injecting/collecting properties are related to the interfacial properties between the semiconducting layer and the cathode or the anode. Conjugated polymer electrolytes have been mainly applied to the solution processable cathode interface layer of opto-electronic devices. Solution processable n-type metal oxides have been used as a solution processable cathode interface layer to improve the electron injecting/collecting properties of the devices. In this presentation, new types of cathode buffer layer materials such as PV, PSS-Na, and PVA for the applications in organic solar cells will be introduced. Also, we will present the effect of arrangement of side chains of conjugated polymer electrolytes on the photovoltaic properties.