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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 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.
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>
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>
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.
Shin, Woong,Lim, Gyeong Eun,Sylvianti, Nadhila,Marsya, Mutia Anissa,Putri, Devi Saskia,Kim, Youn Whan,Kim, Tae-Dong,Choi, Hee Lack,Lee, Bong,Kim, Joo Hyun Informa UK (TaylorFrancis) 2016 Molecular Crystals and Liquid Crystals Vol.635 No.1
<P>A series of small-molecules (SMs) based on coplanar perylene unit coupled with diketopyrrolopyrrole chromophoric core exhibit broad absorption in the range of 500-800nm and low bandgap energise of 1.6-1.7eV. The power conversion efficiency approximately reach at 0.4% under 1.5G illumination is achieved for organic solar cells based on a small-molecule bulk heterojunction system consisting of SMs as a donor and [6,6]-phenyl-C-61-butyric acid methyl ester (PC61BM) as an acceptor.</P>
A-D-A type conjugated oligomers based on benzothiadiazole and their photovoltaic applications
Sylvianti, N.,Kim, Y.W.,Marsya, M.A.,Moon, D.K.,Kim, J.H. Elsevier Sequoia] 2016 Synthetic metals Vol.221 No.-
To investigate the effect of combination between strong electron donor and strong electron acceptor on the diverse properties of conjugated small molecules based on carbazole (Cz) having 2,7-linkage as an electron donor and 2,1,3-benzothiadiazole (BT), 2,7-bis-[5-(7-methyl-benzo[1,2,5]thiadiazol-4-yl)-thiophen-2-yl]-9-(2-octyl-dodecyl)-9H-carbazole (Cz-BT) and 2,7-bis-[5'-(7-methyl-benzo[1,2,5]thiadiazol-4-yl)-[2,2']bithiophenyl-5-yl]-9-(2-octyl-dodecyl)-9H-carbazole (CzT-BT), are synthesized by the Suzuki coupling reaction. In addition, we introduce thiophene (T) ring as the π-bridge to extend the effective conjugation length. Cz-BT and CzT-BT exhibit the band gap of 2.22 and 2.15eV, respectively, due to intermolecular charge transfer between Cz and BT. As increasing the number of T rings, the band gap is lowered and the HOMO and LUMO energy is increased. Inverted-type organic solar cells (OSCs) with a configuration of ITO/ZnO/Cz-BT or CzT-BT:PC<SUB>71</SUB>BM/MoO<SUB>3</SUB>/Al are fabricated. Maximum power conversion efficiency (PCE) of the OSCs based on small molecules is exhibited up to 1.58%.