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
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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
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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
Toward High-Performance Polymer Solar Cells: The Importance of Morphology Control
Xiaoniu Yang,J Joachim Loos +1 more
TL;DR: In this article, the main factors determining the morphology formation and evolution of polymer solar cells are introduced, and gaps of our understanding on nanoscale structure-property relations in the field of high-performance polymer solar cell are addressed.
Journal ArticleDOI
Controlled growth of a molecular bulk heterojunction photovoltaic cell
TL;DR: In this paper, the positions and orientations of donor and acceptor materials are determined during growth by organic vapour-phase deposition (OVPD5), eliminating contorted and resistive conducting pathways while maximizing the interface area.
Journal ArticleDOI
Organic-Based Photovoltaics: Toward Low-Cost Power Generation
TL;DR: In this article, the authors describe the motivation for pursuing research in this field and provide an overview of the various technical approaches that have been developed to date, and discuss the challenges that need to be overcome in order for organic photovoltaics to realize their potential as an economically viable path to harvesting energy from sunlight.
Journal ArticleDOI
A review of charge transport and recombination in polymer/fullerene organic solar cells
TL;DR: In this article, the charge carrier transport and recombination in two types of thermally treated bulk-heterojunction solar cells is reviewed: in regioregular poly(3-hexylthiophene) (RRP3HT) mixed with 1-(3-methoxycarbonyl)propyl-1-phenyl-[6,6]-methanofullerene (PCBM) and in the blend of poly[2-methyl-5-(3,7-dimethyl octyloxy)-phenylene vinylene] (MD
Journal ArticleDOI
Poly(3‐hexylthiophene) Fibers for Photovoltaic Applications
TL;DR: The compatibility of the room‐temperature process developed herein with commonly used plastic substrates may lead to applications such as the development of large‐area flexible solar cells.