Journal ArticleDOI
Mass production of a 3D non-woven nanofabric with crystalline P3HT nanofibrils for organic solar cells
Jin Young Oh,Tae Il Lee,Woo Soon Jang,Soo Sang Chae,Jee Ho Park,Hyun Woo Lee,Jae Min Myoung,Hong Koo Baik +7 more
TLDR
In this article, a strategy for the in line mass production of a 3D non-woven nanofabric consisting of crystalline P3HT nanofibrils, created by in situ cooling of the transportation line to feed a P3H solution for a coating tool, was introduced.Abstract:
A strategy for the in line mass production of a three-dimensional (3D) non-woven nanofabric consisting of crystalline P3HT nanofibrils, created by in situ cooling of the transportation line to feed a P3HT solution for a coating tool, was introduced. The required cooling-temperature with respect to the feeding rate for the overall nanofibril creating process and the yield of the nanofibrils in solution with various organic solvents were determined. Considering the influence of a change in the temperature on the status of the precipitated nanofibrils until feeding it into the spray nozzle, the margin of the surviving nanofibrils at a certain temperature was also investigated. To verify the superiority of our strategy and present directions regarding its application to industry, arrays of organic solar cells based on a 3D non-woven nanofabric structure consisting of P3HT nanofibrils were designed and fabricated using our in situ process combined with a spray-coating system. As a result, through the in situ cooling process, a considerable solar energy harvesting efficiency near 4%, which is a state-of-the-art value in a bi-layer-based solar cell, was obtained.read more
Citations
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Journal Article
Photonic Crystal Geometry for Organic Solar Cells
TL;DR: Organic solar cells with a photonic crystal nanostructure embossed in the photoactive bulk heterojunction layer are reported, a topography that exhibits a 3-fold enhancement of the absorption in specific regions of the solar spectrum in part through multiple excitation resonances.
Journal ArticleDOI
Effect of PEDOT Nanofibril Networks on the Conductivity, Flexibility, and Coatability of PEDOT:PSS Films.
TL;DR: This study suggests a simple way to simultaneously address all of these issues through the addition of a small amount of a nonionic surfactant (Triton X-100) to commercial PEDOT:PSS solutions.
Journal ArticleDOI
Comparing matched polymer:Fullerene solar cells made by solution-sequential processing and traditional blend casting: Nanoscale structure and device performance
Steven A. Hawks,Jordan C. Aguirre,Laura T. Schelhas,Robert James Thompson,Rachel C. Huber,Amy S. Ferreira,Guangye Zhang,Andrew A. Herzing,Sarah H. Tolbert,Benjamin J. Schwartz +9 more
TL;DR: In this paper, the composition and thickness-matching of SqP active layers has been compared with traditional blend casting (BC) and sequential processing (SqP), where the pure polymer and fullerene materials are cast sequentially from different solutions.
Journal ArticleDOI
Enhanced Air Stability of Polymer Solar Cells with a Nanofibril-Based Photoactive Layer
TL;DR: Investigating the photo-oxidation behavior of a bulk-heterojunction (BHJ) photoactive film made of single-crystalline poly(3-hexlythiophene) (P3HT) nanofibrils and fullerene derivatives showed significantly enhanced air stability under sunlight, whereas the PCE of the conventional BHJ solar cell decreased to 20% of its initial PCE under the same experimental conditions.
Journal ArticleDOI
Photoactive Poly(3-hexylthiophene) Nanoweb for Optoelectrical Stimulation to Enhance Neurogenesis of Human Stem Cells.
Kisuk Yang,Jin Young Oh,Jong Seung Lee,Yoonhee Jin,Gyeong Eon Chang,Soo Sang Chae,Eunji Cheong,Hong Koo Baik,Seung Woo Cho +8 more
TL;DR: The photoactive nanoweb substrates developed in this study may serve as platforms for producing stem cell therapeutics with enhanced neurogenesis and neuromodulation via optoelectrical control of stem cells.
References
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Journal ArticleDOI
Poly(3-hexylthiophene): synthetic methodologies and properties in bulk heterojunction solar cells
TL;DR: In this paper, a review of synthetic strategies to poly(3-hexylthiophene) (P3HT) is presented, particularly focusing on those leading to the regioregular form and discussing key physical and morphological properties.
Journal ArticleDOI
Flexible conjugated polymer photovoltaic cells with controlled heterojunctions fabricated using nanoimprint lithography
TL;DR: In this article, the shape and area of the interface between the electron donor and acceptor layers were controllably varied using nanoimprint lithography to increase the short circuit current.
Journal ArticleDOI
Bulk heterojunction solar cells based on preformed polythiophene nanowires via solubility-induced crystallization
Joo-Hyun Kim,Jong Hwan Park,Ji Hwang Lee,Jong Soo Kim,Myungsun Sim,Chiyeoung Shim,Kilwon Cho +6 more
TL;DR: In this article, the fabrication of bulk heterojunction structures in blend films of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) employed two steps to achieve first the in situ formation of self-organized P3HT nanowires using a marginal solvent, and second, phase separation via mild thermal annealing.
Journal ArticleDOI
Self-Seeded Growth of Poly(3-hexylthiophene) (P3HT) Nanofibrils by a Cycle of Cooling and Heating in Solutions
Jin Young Oh,Minkwan Shin,Tae Il Lee,Woo Soon Jang,Yuho Min,Jae Min Myoung,Hong Koo Baik,Unyong Jeong +7 more
TL;DR: In this article, a simple spectroscopic method was proposed to obtain the crystallinity of poly(3-hexylthiophene) (P3HT) nanofibrils in solutions.
Journal ArticleDOI
Dependence of absorption spectra and solubility of poly(3-alkylthiophene) on molecular structure of solvent
TL;DR: In this paper, Taft linear solvation energy relationships have been used to analyze the color changes of poly(3-hexylthiophene) and poly (3-docosylthyphene) solutions at 25°C.