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The Effect of Fluorine Substituent on the properties of Conjugated Oligo-Electrolytes
이준호,진호철,정미진,( Ratna Dewi Maduwu ),( Sabrina Aufar Salma ),김주현 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
Fluorene-based conjugated oligo-electrolytes (COEs) induced by two different Bridge, FTF- and FBF-NBr, were synthesized for the cathode interlayer (CIL) in inverted type polymer solar cells (iPSCs). The device embedded with CIL enhance the power conversion efficiency (PCE) and durability. FBF- and FTF-NBr obviously improve the device performance compared with the reference solar cells without CIL. In this paper, Due to low HOMO level, these interlayers have advantage to hole-blocking ability, and then iPSCs with FBF- and FTF-NBr as the interlayer were fabricated. As a result, the PCE of 7.89% with FBF-NBr and 8.05% with FTF-NBr as the ETL has been achieved.
Alcohol-soluble conjugated polymer as the interfacial layer of inverted polymer solar cell
이준호,진호철,정미진,( Ratna Dewi Maduwu ),( Sabrina Aufar Salma ),김주현 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
Electron transfer layer (ETL) play very important roles in organic solar cells (OSCs). In this paper, we synthesize two fluorene electron transfer materials P[IsoPh-OH-T] and P[IsoPh-Br-T] Salt with the same conjugated backbones but different substituents. To investigate the properties of these materials, the bulk heterojunction(BHJ) OSCs with device structure ITO / ZnO / ETL / PTB7:PC71BM / MoO3 / Ag were fabricated. As a result, Compare with reference device with ZnO/MeOH ( PCE = 7.41%), the devices with P[IsoPh-OH-T] and P[IsoPh-Br-T] Salt achieved PCE of 7.22%, 7.52% respectively. It has been reported that the interface interaction between interlayer and ITO or ZnO can affect work function. After evaluating the interface interaction, the work function of ITO with P[IsoPh-OH-T] and P[IsoPh-Br-T] Salt was shifted from the reference -4.8 eV to -4.46 and -4.44 eV.
New Small Molecular Electrolyte Doped ZnO as the Electron Transport Layer in Organic Solar Cells
정미진,김주현,진호철,이준호,( Sabrina Aufar Salma ),( Ratna Dewi Maduwu ) 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
New small molecular electrolyte was designed and doped into zinc oxide (ZnO) as an electron transport layer (ETL), which improve the power conversion efficiencies (PCEs) of organic solar cells (OSCs). The electrolyte has two hydroxyl groups at the end of the material, which forms a favorable interface dipole between ZnO layer and active layer. As a result, work function of the device based on new material was changed from -4.40 (pristine ZnO) to -4.23 eV (doped ZnO). OSC with the structure of ITO/doped ZnO/PTB7 :PC71BM/MoO3/Ag was fabricated to observe the effect of new material as ETL. The PCE of the device based on doped ZnO was acheived up to 8.27%, which is higher than the PCE of the device based on pristine ZnO (7.48%).
정미진,김주현,진호철,이준호,( Sabrina Aufar Salma ),( Ratna Dewi Maduwu ) 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
Novel organic electrolytes were synthesized and applied to a cathode buffer layer in inverted polymer solar cells (iPSCs). The prepared electrolytes consist of polar quaternary ammonium bromide and hydroxyl groups, which are C4-OH and C4-3OH. A favorable interface dipole is generated due to the quaternary ammonium bromid. Furthemore, the interface dipole magnitude is increased through the polar hydroxyl groups. Thus, the number of hydroxyl groups have an influence on the power conversion efficiencies (PCEs) of iPSCs. The PCE of device based on C4-3OH was higher than the PCE of device based on C4-OH. The best PCE of device with C4-3OH was reached up to 9.20%.
The Change of Interfacial Property through Modifying a Cathode Buffer Layer in Polymer Solar Cells
정미진,김주현,진호철,이준호,( Sabrina Aufar Salma ),( Ratna Dewi Maduwu ) 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
A simple modification of cathode buffer layer was developed to change the interfacial property in polymer solar cells (PSCs). In this presentation, 2-hydroxypyridine (2OH-Py) and 4-hydroxypyridine (4OH-Py) were introduced between a cathode and an active layer as a cathode buffer layer in PSCs, which showed the difference of interfacial dipole by utilizing different position of hydroxyl group in pyridine. It was found that the work function of 2OH-py and 4OH-py is -3.92 and -4.23 eV, respectively. This data is caused by the different interfacial dipole at the cathode interface. As a result, the power conversion efficiency (PCE) of the device based on 2OH-py is higher than the PCE of the device with 4OH-py.
Novel conjugated small-molecule material based on 2-(2-methyl-4Hchromen-4-ylidene)malononitrile
이준호,진호철,정미진,( Ratna Dewi Maduwu ),( Sabrina Aufar Salma ),김주현 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
IDTT-CMCN, IDTT-HT-CMCN were synthesized for novel organic solar cells based on indacenodithieno[3,2-b]thiophene (IDTT) and 2-(2- methyl-4H-chromen-4-ylidene)malononitrile (CMCN). IDTT-HT-CMCN has better solubility and smaller band gap than IDTT-CMCN because of the 3-hexylthiophene (HT) that is widely used as the π-bridge. IDTT-CMCN, IDTT-HT-CMCN show high performance and optical absorption due to effective intramolecular charge transfer (ICT) induced by push-pull effect from acceptor-donor-acceptor (A-D-A) structure. As a result, a power conversion efficiency (PCE) as high as 7.60% was achieved with a short circuit current of 12.7 mA/㎠, open circuit voltage of 0.94 V, and fill factor of 63.8%.