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
Citations
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Improving the Reproducibility of P3HT:PCBM Solar Cells by Controlling the PCBM/Cathode Interface
Bertrand J. Tremolet de Villers,Christopher J. Tassone,Sarah H. Tolbert,Benjamin J. Schwartz +3 more
TL;DR: In this article, the authors show that the photogeneration and charge extraction with a linearly increasing voltage ramp (photo−CELIV) measurements show an order-of-magnitude difference in the effective mobilities of the electrons and holes.
Journal ArticleDOI
Visualizing a homogeneous blend in bulk heterojunction polymer solar cells by analytical electron microscopy.
Martin Pfannmöller,Harald Flügge,Gerd Benner,Irene Wacker,Christoph Sommer,Michael Hanselmann,Stephan Schmale,Hans Schmidt,Fred A. Hamprecht,Torsten Rabe,Wolfgang Kowalsky,Rasmus R. Schröder +11 more
TL;DR: For the first time, high-resolution spectroscopic imaging using an analytical transmission electron microscope with nonlinear multivariate statistical analysis for classification of multispectral image data results in a visual representation showing homogeneous phases of donor and acceptor.
Journal ArticleDOI
Importance of Domain Purity and Molecular Packing in Efficient Solution‐Processed Small‐Molecule Solar Cells
Subhrangsu Mukherjee,Christopher M. Proctor,John R. Tumbleston,Guillermo C. Bazan,Thuc-Quyen Nguyen,Harald Ade +5 more
TL;DR: Connections are delineated between solar-cell performance, charge-carrier mobilities, and morphology in a highperformance molecular solar cell and the observations show that maximizing the relative phase purity and structural order while simultaneously limiting the domain size may be essential for achieving optimal solar- cell performances in solution-processed small-molecule solar cells.
Journal ArticleDOI
High‐Efficiency Organic Solar Cells Based on End‐Functional‐Group‐Modified Poly(3‐hexylthiophene)
TL;DR: [*] Prof. K. Cho, Prof. H. Lee, and Dr. J. Park Department of Chemical Engineering Polymer Research Institute Pohang University of Science and Engineering Pohange, 790-784 (Korea) E-mail: kwcho@postech.ac.kr
Journal ArticleDOI
Solution-Processed DPP-Based Small Molecule that Gives High Photovoltaic Efficiency with Judicious Device Optimization
Jianhua Huang,Chuanlang Zhan,Xin Zhang,Yan Zhao,Zhenhuan Lu,Hui Jia,Bo Jiang,Jian Ye,Shanlin Zhang,Ailing Tang,Yunqi Liu,Qibing Pei,Jiannian Yao +12 more
TL;DR: A solution-processed diketopyrrolopyrrole (DPP)-based small molecule, namely BDT-DPP, with broad absorption and suitable energy levels has been synthesized and shows better phase separation than that from CF, because of the slow drying nature of o-DCB, offering sufficient time for the self-organization of active-layer.
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.