http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
( Sabrina Aufar Salma ),진호철,( Ratna Dewi Maduwu ),정미진,이준호,손동환,김주현 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
The new material for donor compromise indacedithieno[3,2-b]thiophene (IDTT) as donor moiety, phenylisoxazolone (OX) and malononitrile derivatives (EPMP-IDC) as acceptor moiety, named IDTT-OX and IDTT-EPMP-IDC have been successfully synthesized and investigated their photovoltaic performance for solution-processed bulk heterojunction organic solar cells (OSCs). IDTT-OX exhibits a strong self-aggregation behavior and broad absorption with an optical band gap of 1.88 eV, while IDTT-EPMP-IDC show better behavior with 1.60 eV optical band gab. The inverted-type devices based on IDTT-OX and IDTT-EPMP-IDC as a donor, PC71BM as an acceptor are fabricate to investigate the relationship of different functional group in donor unit. The power conversion effciency (PCE) of the optimized devices are achieved up to 0.29% for IDTT-OX and 2.07% for IDTT-EPMP-IDC.
The effect of 2,6-pyridinedimethanol applied on behalf of ZnO to inverted organic solar cells
진호철,정미진,이준호,( Sabrina Aufar Salma ),( Ratna Dewi Maduwu ),김주현 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
Until now, many researchers have proved that decreasing a Schottky barrier can be a way to improving the power conversion efficiency (PCE) of organic solar cells. 2,6-pyridinedimethanol (2,6-PydiOH) is applied to inverted organic solar cells (iOSCs) based on the configuration with ITO / 2,6-PydiOH / PTB7:PC71BM / MoO3 / Ag to decreasing the Schottky barrier. A thin layer of the 2,6-PydiOH induces an interface dipole on the ITO layer. The PCE of the devices the 2,6-PydiOH is applied achieved 7.44% with a short circuit current density (J<sub>sc</sub>) of 14.65 mA/㎠, an open circuit voltage (V<sub>oc</sub>) of 0.71 V, and a fill factor (FF) of 67.9%, respectively. It is noteworthy that the PCE for devices with the 2,6-PydiOH has a value similar to those with ZnO. It is possible to fabricate the high efficiency iOSCs without any thermal annealing over 150°C.
진호철,김동근,( Ratna Dewi Maduwu ),( Sabrina Aufar Salma ),김주현 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
As the fossil fuels that are currently being used are depleted, renewable energy industry recently has become active. And the one of renewable energy is solar cells. Especially, Organic solar cell (OSC) is a one of effective ways to convert solar source to electrical energy. Recently, many researchers have tried to achieve higher power conversion efficiency (PCE) of OSC by developing new semiconducting materials. In this study, we design the new small molecules with organic hydroxyl groups and intercalate between ZnO layer and active layer. Herein, hydroxyl groups induce the favorable interface dipole for these electron transfer layer (ETL) to enhance PCE. And we investigate the effect of interface dipole from hydroxyl groups on photovoltaic parameters.
Association of acidity in Polyfluorene based-Electrolytes with the Photovoltaic Properties
진호철,정미진,이준호,( Ratna Dewi Maduwu ),( Sabrina Aufar Salma ),손동환,김주현 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
The interfacial effect on photogenerated holes and electrons transfer is known related with a Schottky barrier and the resistance of device. Herein, we investigated the association of acidity in polyfluorene based-electrolytes (PFN) with the photovoltaic properties, such as the Schottky barrier and the resistance of device. The PFN has been famous, but the association between PFN and acid is rarely investigated. Thus, we selected four materials with different acidity, where the pKa value are from 4.7 to -2.8. The power conversion efficiencies (PCEs) were performed to investigate the effect of acidity. To explain the photovoltaic parameter, especially the short-circuit current density (Jsc) and the fill factor (FF), the Kelvin probe microscopy and the impedence spectroscopy were performed. The result shows well-matched association with the photovoltaic properties, where the high Jsc correspond to the low Schottky barrier and the high FF correspond to the high recombination resistance.
Modification of Pyridine Based Cathode buffer layer in Polymer Solar Cells
( Sabrina Aufar Salma ),김동근,( Ratna Dewi Maduwu ),진호철,김주현 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
Interfacial materials are essential to the performance and stability of polymer solar cells (PSCs). Here, we introduced the role of pyridine derivative as an efficient cathode buffer layer between the photoactive layer and Zn cathode. The work function of the cathode and energy barrier at the interfaces between the cathode and active layer was modified by changing interfacial dipole as different positions of hydroxide in pyridine. When using pyridine derivative instead of the traditionally used ITO/ZnO cathode in PSCs, the short-circuit current density (Jsc) is improved and the power conversion efficiency (PCE) of PSCs based device with pyridine buffer layer is increased. A better performance with PCE of different position is achieved when 2-hydroxy pyridine is chosen as buffer layers. The results indicate that pyridine derivative is a promising electron collection material as a substitute of the traditional low-work-function cathode.
( Sabrina Aufar Salma ),김동근,( Ratna Dewi Maduwu ),진호철,김주현 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
Highly efficient and stable polymer solar cells (PSCs) have been fabricated by introducing interface dipoles at the cathode interface as a cathode buffer, which can greatly improve device performance by influencing the strength of interfacial dipoles in PSCs. By choosing suitable interfacial materials, the energetic barrier height at the interface could be reduced to form an ohmic contact with less series resistance, inducing high charge collection efficiency of the corresponding electrodes for holes or electrons. In this paper, we investigated the different types counteranions (CAs) on conjugated polymer electrolytes (CPEs) or polyelectrolytes based on a cationic polyviologen (PV) derivative as cathode buffer layer. The strength of interfacial dipoles in PSCs is affected by changing the CAs in PV derivatives.
A series of Ruthenium Complexes as Interlayer in Inverted Bulk Hetero Junction Solar Cells
( Sabrina Aufar Salma ),( Ratna Dewi Maduwu ),진호철,정미진,김주현 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
A set of ruthenium complexes with different ligand are fabricated as interlayer for inverted bulk heterojunction solar cells. We found that changing the ligand from 2,2’-bipirydine-4-carboxylic acid (RubiPy) with thiocyanate (N719) results in slightly difference in power convertsion efficiency. The set of ruthenium complexes are presented to reduce surface defect in ZnO layer, also decrease the electron injection barrier between ZnO and PC71BM:PTB7 layer. Interfacial contact between cathode and active layers would increase charge generation, transportation and collection. Based on our study the set of ruthenium complexes could boost the device performance with the Ru-bipy (8.05%) has lightly lower PCE than N719 (8.08%).