Journal ArticleDOI
Thermally stable, efficient polymer solar cells with nanoscale control of the interpenetrating network morphology
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TLDR
By applying specific fabrication conditions summarized in the Experimental section and post-production annealing at 150°C, polymer solar cells with power-conversion efficiency approaching 5% were demonstrated.Abstract:
By applying the specific fabrication conditions summarized in the Experimental section and post-production annealing at 150 °C, polymer solar cells with power-conversion efficiency approaching 5 % are demonstrated. These devices exhibit remarkable thermal stability. We attribute the improved performance to changes in the bulk heterojunction material induced by thermal annealing. The improved nanoscale morphology, the increased crystallinity of the semiconducting polymer, and the improved contact to the electron-collecting electrode facilitate charge generation, charge transport to, and charge collection at the electrodes, thereby enhancing the device efficiency by lowering the series resistance of the polymer solar cells.read more
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Transient absorption spectroscopy of polymer-based thin-film solar cells
TL;DR: In this paper, a brief overview of the basic mechanism of polymer-based solar cells, and the recent progress in the device performance based on the development of materials is presented, which can provide valuable guidelines for materials design and device engineering and therefore is essential for further improvement of device performance.
Journal ArticleDOI
Spatial Fourier‐Transform Analysis of the Morphology of Bulk Heterojunction Materials Used in “Plastic” Solar Cells
Journal ArticleDOI
Segregated versus Mixed Interchain Stacking in Highly Oriented Films of Naphthalene Diimide Bithiophene Copolymers
Martin Brinkmann,Eric Gonthier,Stéfan Bogen,Kim Tremel,Sabine Ludwigs,Martin Hufnagel,Michael Sommer +6 more
TL;DR: Two distinct polymorphs with unprecedented intrachain resolution are identified by high-resolution transmission electron microscopy (HR-TEM), especially in the charge transfer band around 750 nm which is also observed in spin-coated films.
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
Phenyl vs Alkyl Polythiophene: A Solar Cell Comparison Using a Vinazene Derivative as Acceptor
TL;DR: In this article, the authors compared the solar cell performance of poly[3-(4n-octyl)-phenylthiophene] (POPT) and poly(3-hexyl thiophene) (P3HT) in devices using 4,7-bis(2-(1-(2-ethylhexyl)-4,5-dicyanoimidazol-2-yl)vinyl)-vinyl)benzo[c][1,2,5]-thiadiazole (EV-BT) as the electron
References
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Journal ArticleDOI
Polymer photovoltaic cells : enhanced efficiencies via a network of internal donor-acceptor heterojunctions
TL;DR: In this paper, the carrier collection efficiency and energy conversion efficiency of polymer photovoltaic cells were improved by blending of the semiconducting polymer with C60 or its functionalized derivatives.
Journal ArticleDOI
2.5% efficient organic plastic solar cells
Sean E. Shaheen,Christoph J. Brabec,N. Serdar Sariciftci,F. Padinger,Thomas Fromherz,Jan C. Hummelen +5 more
TL;DR: In this article, the power conversion efficiency of organic photovoltaic devices based on a conjugated polymer/methanofullerene blend is dramatically affected by molecular morphology.
Journal ArticleDOI
Effects of Postproduction Treatment on Plastic Solar Cells
TL;DR: In this article, a post-production treatment that improves the performance of solar cells based on poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C61-butyric acid methyl ester (PCBM) was developed.
Journal ArticleDOI
Nanoscale Morphology of High-Performance Polymer Solar Cells
Xiaoniu Yang,J Joachim Loos,Sjoerd Veenstra,Wiljan Verhees,MM Martijn Wienk,Jan M. Kroon,Matthias A. J. Michels,René A. J. Janssen +7 more
TL;DR: Both the improved crystalline nature of films and increased but controlled demixing between the two constitutes therein after annealing explains the considerable increase of the power conversion efficiency observed in these devices.
Journal ArticleDOI
Modeling photocurrent action spectra of photovoltaic devices based on organic thin films
TL;DR: In this article, the authors modeled experimental short-circuit photocurrent action spectra of poly(3-(4′-(1″,4″,7″-trioxaoctyl)phenyl)thiophene) (PEOPT)/fullerene (C60) thin film heterojunction photovoltaic devices.