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
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TLDR
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.Abstract:
Transmission electron microscopy and electron diffraction are used to study the changes in morphology of composite films of poly(3-hexylthiophene) (P3HT) and a methanofullerene derivative (PCBM) in bulk heterojunction solar cells. Thermal annealing produces and stabilizes a nanoscale interpenetrating network with crystalline order for both components. P3HT forms long, thin conducting nanowires in a rather homogeneous, nanocrystalline PCBM film. 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.read more
Citations
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A large interconnecting network within hybrid MEH-PPV/TiO 2 nanorod photovoltaic devices
Tsung-Wei Zeng,Yun-Yue Lin,Hsi-Hsing Lo,Chun-Wei Chen,Cheng-Hsuan Chen,Sz-Chian Liou,Hong-Yun Huang,Wei-Fang Su +7 more
TL;DR: In this paper, a large interconnecting network within the photovoltaic device fabricated by inserting a layer of TiO2 nanorods between the MEH-PPV hybrid active layer and the aluminium electrode is described.
Journal ArticleDOI
Molecular weight effect on the efficiency of polymer solar cells.
Chang Liu,Kai Wang,Xiaowen Hu,Xiaowen Hu,Yali Yang,Chih-Hao Hsu,Wei Zhang,Steven Xiao,Xiong Gong,Xiong Gong,Yong Cao +10 more
TL;DR: The investigation of the influence of molecular weight (MW) on power conversion efficiency (PCE) of bulk heterojunction (BHJ) polymer solar cells (PSCs) demonstrated that the MW of donor polymer plays an important role in the performance of BHJ PSCs.
Journal ArticleDOI
Molecular weight dependence of the morphology in P3HT:PCBM solar cells
Feng Liu,Dian Chen,Cheng Wang,Kaiyuan Luo,Weiyin Gu,Alejandro L. Briseno,Julia W. P. Hsu,Thomas P. Russell +7 more
TL;DR: It is shown that the morphology of the photovoltaic active layer and the absorption and crystal structure of P3 HT are dependent on the MW, and that the low-molecular-weight P3HT more readily crystallizes, promoting a phase-separated morphology.
Journal ArticleDOI
Determination of Solvent–Polymer and Polymer–Polymer Flory–Huggins Interaction Parameters for Poly(3-hexylthiophene) via Solvent Vapor Swelling
TL;DR: In this article, solvent vapor swelling of ultrathin polymer films was used to determine Flory-Huggins solventpolymer and polymerpolymer interaction parameters (χi-j) for poly(3-hexylthiophene) (P3HT) and polystyrene (PS) over a wide solvent composition range.
Journal ArticleDOI
Conducting Polymers for Optoelectronic Devices and Organic Solar Cells: A Review
Ary R. Murad,Ahmed Iraqi,Shujahadeen B. Aziz,Shujahadeen B. Aziz,Sozan N. Abdullah,Mohamad A. Brza +5 more
TL;DR: Several processing parameters such as the choice of solvent(s) for spin casting film, thermal and solvent annealing, solvent additive, and blend composition that affect the nano-morphology of the photoactive layer are reviewed.
References
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Journal ArticleDOI
Hybrid Nanorod-Polymer Solar Cells
TL;DR: It is demonstrated that semiconductor nanorods can be used to fabricate readily processed and efficient hybrid solar cells together with polymers and Tuning the band gap by altering the nanorod radius enabled us to optimize the overlap between the absorption spectrum of the cell and the solar emission spectrum.
Journal ArticleDOI
Two‐layer organic photovoltaic cell
TL;DR: In this paper, a two-layer organic photovoltaic cell was fabricated from copper phthalocyanine and a perylene tetracarboxylic derivative, achieving a power conversion efficiency of about 1% under simulated AM2 illumination.
Journal ArticleDOI
Two-dimensional charge transport in self-organized, high-mobility conjugated polymers
Henning Sirringhaus,Peter J. Brown,Richard H. Friend,Martin Nielsen,Klaus Bechgaard,B.M.W. Langeveld-Voss,A. J. H. Spiering,René A. J. Janssen,E. W. Meijer,P. T. Herwig,Dago M. de Leeuw +10 more
TL;DR: In this article, the authors used thin-film, field effect transistor structures to probe the transport properties of the ordered microcrystalline domains in the conjugated polymer poly(3-hexylthiophene), P3HT.
Journal ArticleDOI
Efficient photodiodes from interpenetrating polymer networks
J. J. M. Halls,C. A. Walsh,Neil C. Greenham,E.A. Marseglia,Richard H. Friend,Stephen C. Moratti,A.B. Holmes +6 more
TL;DR: In this paper, the interpenetrating network formed from a phase-segregated mixture of two semiconducting polymers is shown to provide both the spatially distributed interfaces necessary for efficient charge photo-generation, and the means for separately collecting the electrons and holes.
Journal ArticleDOI
Integrated Optoelectronic Devices Based on Conjugated Polymers
TL;DR: An all-polymer semiconductor integrated device is demonstrated with a high-mobility conjugated polymer field-effect transistor driving a polymer light-emitting diode (LED) of similar size, which represents a step toward all- polymer optoelectronic integrated circuits such as active-matrix polymer LED displays.