A5050112486- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Listeria monocytogenes in Food Safety
- Biosensors and Analytical Detection
- Organic Light-Emitting Diodes Research
- Advanced Chemical Sensor Technologies
- Thin-Film Transistor Technologies
- Multimodal Machine Learning Applications
- Force Microscopy Techniques and Applications
- Quantum Dots Synthesis And Properties
- Fullerene Chemistry and Applications
- Diverse Approaches in Healthcare and Education Studies
- X-ray Diffraction in Crystallography
- Molecular Junctions and Nanostructures
- Perovskite Materials and Applications
- Nanofabrication and Lithography Techniques
- Education and Learning Interventions
- Optical Coatings and Gratings
- solar cell performance optimization
- Chalcogenide Semiconductor Thin Films
- Diverse Topics in Contemporary Research
- Consumer Perception and Purchasing Behavior
- Crystallization and Solubility Studies
- Integrated Circuits and Semiconductor Failure Analysis
- EEG and Brain-Computer Interfaces
Samsung (South Korea)
2009-2024
Dongguk University
2023-2024
Seoul National University
2019-2023
Catholic University of Korea
2022
National Institute of Agricultural Science and Technology
2022
Weatherford College
2022
Chungnam National University
2014-2017
Kyungpook National University
2008-2013
Korea Innotech (South Korea)
2011-2013
Imperial College London
2009
Abstract The in situ morphology change upon thermal annealing bulk heterojunction blend films of regioregular poly(3‐hexylthiophene) (P3HT) and 1‐(3‐methoxycarbonyl)‐propyl‐1‐phenyl‐(6,6)C 61 (PCBM) is measured by a grazing incidence X‐ray diffraction (GIXD) method using synchrotron radiation source. results show that the film morphology—including size population P3HT crystallites—abruptly changes at 140 °C between 5 30 min then stable up to 120 min. This trend almost good agreement with...
A distinct thermal annealing temperature exhibiting a maximum efficiency was observed for polymer solar cells with ternary blend film that consists of one soluble fullerene and two kinds conjugated (electron-donating electron-accepting polymer). The sharp shape trend device performance has been assigned primarily to the influence [poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT)], since glass transition F8BT exactly same as best temperature. cell made in this work poorer than...
We found that 1-(3-methoxycarbonyl)propyl-1-phenyl-(6,6)C61 (PCBM) molecules make a distorted asymmetric body-centered cubic crystal nanostructure in the bulk heterojunction films of reigoregular poly(3-hexylthiophene) and PCBM. The wider angle distortion PCBM nanocrystals was ∼96°, which can be assigned to influence attached side group fullerene ball bestow solubility. Atom concentration analysis showed after thermal annealing do preferentially distribute above layer P3HT inside devices.
Abstract The performance of polymer:polymer solar cells that are made using blend films poly(3‐hexylthiophene) (P3HT) and poly(9,9‐dioctylfluorene‐co‐ benzothiadiazole (F8BT) is improved by doping the F8BT polymer with an organosulfonic acid [4‐ethylbezenesulfonic (EBSA)]. EBSA F8BT, to form F8BT‐EBSA, performed means a two‐stage reaction at room temperature 60°C various weight ratios. X‐ray photoelectron spectroscopy measurement reveals both sulfur nitrogen atoms in affected doping....
Here we report the influence of electron-donating polymer addition on performance poly(3-hexylthiophene) (P3HT) : 1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6)C61 (PCBM) solar cells. Poly[2-methoxy-5-(3',7'-dimethyloctyloxy)-1,4-phenylenevinylene] (MDMO-PPV) was chosen as to improve open circuit voltage (VOC) due its higher level highest occupied molecular orbital energy compared with P3HT. Results showed that MDMO-PPV led an improved VOC for ternary blend (P3HT PCBM) In particular, after...
We report the nanomorphology-driven two-stage hole mobility in blend films of regioregular and regiorandom poly(3-hexylthiophene) (P3HT) polymers which regioregularity was 92.2% 33.0%, respectively. The measured by employing a top-contact type organic field-effect transistor has an aromatic polyimide gate insulating layer silver source/drain electrodes. Results showed that suddenly reduced as large two orders magnitude bulk decreased from 89.8% to 86.3%, even though change far less than one...
We report the temperature/time-dependent crystallization of poly(3-hexylthiophene) (P3HT) in blend films P3HT and [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM). The behaviour P3HT:PC61BM was measured as a function annealing time at two different temperatures (150 °C 160 °C) by employing synchrotron-radiation grazing-incidence angle X-ray diffraction (GIXD) technique. correlated with corresponding solar cells annealed under same conditions. Results showed that trend device performance...
With the combination of a molecular combing technique and scanning-probe lithographic patterning, lambda-DNA's were stretched aligned to form line array structures on patterned organic monolayer surfaces. The pattern was generated by anodizing silicon surface using lithography implant polar layer in middle nonpolar layer. molecule layer, (aminopropyl)triethoxysilane (APS), has -NH(3)(+) terminal group, which interacts strongly with phosphate backbone DNA provides site for selective...
Changes of the initial performance polymer/fullerene solar cells are investigated by continuous illumination with simulated light. The fill factor gradually decreases exposure time, whereas series resistance increases. These changes ascribed to a marginal change in surface composition active layer. Recently, polymer have attracted keen interest as sustainable energy conversion media owing their potential for low-cost manufacturing and advanced features, including semi-transparency...
Kale (Brassica oleracea L. Acephala Group) is the rich source of medicinal value sulphur compounds, glucosinolates (GLSs). The aim this study was to investigate effect different proportion (S) supplementation levels on accumulation GLSs in leaves kale cultivar ('TBC'). High performance liquid chromatography (HPLC) separation method guided identify and quantify six GSLs including three aliphatic (progoitrin, sinigrin gluconapin) indolyl (glucobrassicin, 4-methoxyglucobrassicin...
BACKGROUND:Excessive metals in the soil have become one of most significant environmental problems.Phytoremediation has received considerable attention as a method for restoring contaminated soils.The microbes having remarkable metal tolerance and plant growth-promoting abilities could also play role remediation metal-contaminated soils, because bioaugmentation with such promote phytoextraction metals.Therefore, present study was focused on evaluating heavy (Co, Pb Zn) Helianthus annuus...
In this letter we attempted to examine the possible deformation of a lithium fluoride (LiF) nanolayer inserted in between light-absorbing polymeric layer (a mix poly(3-hexylthiophene) (P3HT) and 1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6)C61 (PCBM)) metal (Al) electrode polymer : fullerene solar cells. The direct annealing devices with LiF resulted gradual decay device performances time at an optimum temperature, after exhibiting maximum efficiency by very short-time (3 min). contrast, study...
We report the improved performance of all-polymer solar cells with bulk heterojunction nanolayers an electron-donating polymer (poly(3-hexylthiophene) (P3HT)) and electron-accepting (poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT)), which were both doped 4-ethylbenzenesulfonic acid (EBSA). To choose doping ratio P3HT for cells, various EBSA ratios (0, 1, 3, 5, 10, 20 wt%) tested by employing optical absorption spectroscopy, photoluminescence photoelectron yield space-charge-limited...
In this paper, we report the effect of long annealing time device and influence incident light intensity on performance polymer solar cells prepared using a Ca/Al top electrode blend film regioregular poly(3-hexylthiophene) soluble fullerene as photoactive layer. Results showed that exhibited four-stage trend with time, which was attributed to continuous change nanomorphology in films. particular, longest (300 min) did not degrade performance, thus indicating durability thin Ca electrode....
Here, we report multilayer organic solar cells fabricated using a mix of solution (wet) and thermal evaporation (dry) techniques, which consist indium-tin oxide (ITO), poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), poly(3-hexylthiophene) (P3HT):1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6)C61 (PCBM), C60, bathocuproine (BCP), aluminum layers. Results show that the short circuit current density (JSC) ITO∕PEDOT:PSS∕C60/BCP/Al device was greatly improved by inserting...
We report the effect of hole-transporting material (HTM) addition on performance polymer solar cells based blends poly(3-hexylthiophene) (P3HT) and soluble fullerene. N,N′-Diphenyl-N,N′-bis(3-methylphenyl)-[1,1′-diphenyl]-4,4′-diamine (TPD) was chosen as a HTM because it is one well-established HTMs despite its drawback wide band gap (3.1 eV) for cell applications. Two specialized measurement systems, synchrotron radiation grazing incidence angle X-ray diffraction (GIXD) phase-mode atomic...