A5049650062- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Semiconductor materials and interfaces
- Perovskite Materials and Applications
- Organic Light-Emitting Diodes Research
- Chemical Synthesis and Reactions
- Asymmetric Hydrogenation and Catalysis
- Cavitation Phenomena in Pumps
- Synthesis and properties of polymers
- Photopolymerization techniques and applications
- Wind Energy Research and Development
- Radical Photochemical Reactions
- Molecular Junctions and Nanostructures
- Fullerene Chemistry and Applications
- Advanced Polymer Synthesis and Characterization
- Chemical Synthesis and Analysis
- Refrigeration and Air Conditioning Technologies
- Chalcogenide Semiconductor Thin Films
- Inorganic and Organometallic Chemistry
Ulsan National Institute of Science and Technology
2018
Korea Research Institute of Chemical Technology
2012-2017
Daejeon University
2016-2017
Government of the Republic of Korea
2016-2017
Korea University of Science and Technology
2012-2016
The addition of chemical additives is considered as a promising approach for obtaining high-quality perovskite films under mild conditions, which essential both the efficiency and stability organic-inorganic hybrid solar cells (PeSCs). Although such additive engineering yields films, inherent insulating property prevents efficient transport extraction charge carriers, thereby limiting applicability this approach. Here, it shown that organic conjugated molecules having rhodanine moieties...
We studied fullerene-free organic solar cells using rhodanine-terminated BDT3TR and O-IDTBR.
Solution‐processed organic solar cells are promising owing to their light weight, ease of processability, low cost, flexibility, and large‐area fabrication. Particularly, small‐molecule active materials have been recently developed using straightforward synthesizing methods, exhibiting the least batch‐to‐batch variation in physical optoelectronic properties highly reproducible efficiency. A series 2D‐BDT‐based with various numbers benzodithiophene (BDT) units how number 2D‐BDT influences...
A novel naphtho[2,3-b:6,7-d′]dithiophene (NDT)-based copolymer, poly[4,9-bis(2-ethylhexyloxy)naphtho[2,3-b:6,7-d′]dithiophene-2,7-diyl-alt-1,3-(5-heptadecan-9-yl)-4H-thieno[3,4-c]pyrrole-4,6-dione] (P1), was synthesized and characterized for use in polymer solar cells. We systematically investigated the synthesis, thermal stability, optical electrochemical properties, field-effect carrier mobilities, photovoltaic characteristics of resulting polymer. The properties NDT-based were compared...
Novel triisopropylsilylethynyl (TIPS)-substituted benzodithiophene-based copolymers, poly[4,8-bis(triisopropylsilylethynyl)benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl-alt-4,6-(2-ethylhexyl-thieno[3,4-b]thiophene-2-carboxylate)] (P1), poly[4,8-bis(triisopropylsilylethynyl)benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl-alt-[4,6-{(1-thieno[3,4-b]thiophen-2-yl)-2-ethylhexan-1-one}] (P2), and...
Two naphtho[1,2-b:5,6-b′]dithiophene-based copolymers, poly[4,9-bis(2-ethylhexyloxy)naphtho[1,2-b:5,6-b′]dithiophene-2,7-diyl-alt-[4,6-{(1-thieno[3,4-b]thiophen-2-yl)-2-ethylhexan-1-one}] (P1) and poly[4,9-bis(2-ethylhexyloxy)naphtho[1,2-b:5,6-b′]dithiophene-2,7-diyl-alt-[4,6-{(1-(3-fluorothieno[3,4-b]thiophen)-2-yl)-2-ethylhexan-1-one}] (P2), were designed synthesized for use in polymer solar cells (PSCs). We systematically investigated the synthesis, thermal stability, optical...
Highly efficient and stable BDT2TR:PNDI-2T organic solar cells are investigated. Although this system shows a PCE of 4.43%, significant enhancements observed in the thermal stability, high thickness tolerance, flexibility as compared with PC<sub>71</sub>BM-based cells.
A simple methodology for the reduction of acid chlorides to their corresponding alcohols has been developed. Various carboxylic acids were converted in excellent yields using NaBH4-K2CO3 a mixed solvent system dichloromethane and water (1:1) presence phase-transfer catalyst at low temperature. The importance work is its simplicity, selectivity, yield, very short reaction time. This new condition proved be an chemoselective method range various functional groups.
New dithieno[3,2-b:2',3'-d]thiophene (DTT)-based copolymers were designed and synthesized for use as donor materials in polymer solar cells (PSCs). The optical, electrochemical, photovoltaic properties of the investigated. results indicate that acceptor units influenced band gap, electronic energy levels, significantly. gaps range 1.85-2.02 eV. Under optimized conditions, DTT-based polymers showed power conversion efficiencies (PCEs) PSCs 0.97-1.19% under AM 1.5 illumination (100 mW/cm2)....
ABSTRACT A “zigzag” naphthodithiophene‐based copolymer, poly[4,9‐bis(2‐ethylhexyloxy)naphtho[1,2‐b:5,6‐b′]dithiophene‐2,7‐diyl‐alt‐1,3‐(5‐heptadecan‐9‐yl)‐4H‐thieno[3,4‐c]pyrrole‐4,6‐dione] (P1) is synthesized and its properties are compared to “linear” poly[4,9‐bis(2‐ethylhexyloxy)naphtho[2,3‐b:6,7‐d′]dithiophene‐2,7‐diyl‐alt‐1,3‐(5‐heptadecan‐9‐yl)‐4H‐thieno[3,4‐c]pyrrole‐4,6‐dione] (P2). The field‐effect carrier mobilities the optical, electrochemical, photovoltaic of copolymers...