Controlled growth of a molecular bulk heterojunction photovoltaic cell

The power conversion efficiency of organic photovoltaic cells has increased with the introduction of the donor–acceptor heterojunction that serves to dissociate strongly bound photogenerated excitons1. Furthe.
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Complex multilength-scale morphology in organic photovoltaics

Jun 2, 2022· Control over the morphology in bulk heterojunction (BHJ) organic photovoltaics (OPVs) remains a key issue in improving the power conversion efficiency (PCE), despite the

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Universal Formation of Compositionally Graded Bulk Heterojunction

May 1, 2014· A universal method is reported to form graded bulk heterojunction (BHJ) organic photovoltaic devices (OPVs) by a simple solvent-fluxing process, with efficiency enhancements by 15-50% compared with the optimized regular BHJ OPVs. A universal method is reported to form graded bulk heterojunction (BHJ) organic photovoltaic devices (OPVs) by a simple solvent

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Phase controlled all-polymer bulk-heterojunction photovoltaic cells

Dec 1, 2010· All-polymer bulk-heterojunction photovoltaic cells based on poly(N-vinyl carbazole) and poly(9,9-dioctylfluorene-co-benzothiadiazole) co-casting films are investigated. One of the highest reported open-circuit voltage among the all-polymer solar cells is obtained due to the large energy offset between the highest occupied molecular orbital of

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Controlled growth of a molecular bulk heterojunction photovoltaic cell

The power conversion efficiency of organic photovoltaic cells has increased with the introduction of the donor-acceptor heterojunction that serves to dissociate strongly bound photogenerated excitons 1.Further efficiency increases have been achieved in both polymer 2,3 and small-molecular-mass 4 organic photovoltaic cells through the use of the bulk heterojunction (BHJ),

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Fast-Growth Polymer: Fullerene Bulk-Heterojunction Thin Films

Mar 11, 2024· The bulk-heterojunction (BHJ) system that uses a π-conjugated polymer as an electron donor, and a fullerene derivative as an electron acceptor, is widely used in organic solar cells (OSCs) to facilitate efficient charge separation and extraction. However, the conventional BHJ system still suffers from unwanted phase segregation caused by the existence of

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Publications

Controlled Growth Of A Molecular Bulk Heterojunction Photovoltaic Cell, Nature Materials, 4(1):37. Zhou, T, Ngo, T, Brown, J, Shtein, M, and Forrest, S (2005). Stable And Efficient Electrophosphorescent Organic Light-Emitting Devices Grown By Organic Vapor Phase Deposition, Applied Physics Letters, 86(2).

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Growth and modelling of spherical crystalline morphologies of molecular

Oct 16, 2014· Using this method, Yang et al. 1 showed controlled growth of ordered bulk heterojunction photovoltaic cells, where the electron donor layer of copper phthalocyanine exhibited a continuous wetting

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Controlled growth of a molecular bulk heterojunction photovoltaic cell

The power conversion efficiency of organic photovoltaic cells has increased with the introduction of the donor-acceptor heterojunction that serves to dissociate strongly bound photogenerated excitons 1.Further efficiency increases have been achieved in both polymer 2,3 and small-molecular-mass 4 organic photovoltaic cells through the use of the bulk heterojunction (BHJ),

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Growth and modelling of spherical crystalline morphologies of

Oct 16, 2014· Using this method, Yang et al. 1 showed controlled growth of ordered bulk heterojunction photovoltaic cells, where the electron donor layer of copper phthalocyanine

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Highly efficient CsPbI3/Cs1-xDMAxPbI3 bulk

Apr 20, 2022· A stable CsPbI3/Cs1-xDMAxPbI3 bulk heterojunction (BHJ) PSC was fabricated via precisely controlling the thermal annealing process. The perovskite BHJ structure not only facilitates the charge separation and

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Fast-Growth Polymer: Fullerene Bulk-Heterojunction

Mar 11, 2024· The bulk-heterojunction (BHJ) system that uses a π-conjugated polymer as an electron donor, and a fullerene derivative as an electron acceptor, is widely used in organic solar cells (OSCs) to facilitate efficient charge

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Independent control of bulk and interfacial morphologies of small

Jul 24, 2012· It is demonstrated that the optimal organic photovoltaic morphology is characterized by interfacial disorder to minimize polaron-pair recombination, while improved crystallinity in the bulk increases exciton and charge transport efficiency in the active region. We demonstrate that solvent vapor annealing of small molecular weight organic heterojunctions can be used to

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Formation of crystalline bulk heterojunctions in organic solar

Solution-processed organic bulk-heterojunction (BHJ) active layers form sophisticated nanostructures during the drying of the wet-deposited solution, because of complex physical processes such as crystallization and/or liquid-liquid phase separation (LLPS). This structure strongly impacts the photovoltaic performance of organic solar cells.

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Publications — UMich MSE

Controlled Growth Of A Molecular Bulk Heterojunction Photovoltaic Cell, Nature Materials, 4(1):37. Zhou, T, Ngo, T, Brown, J, Shtein, M, and Forrest, S (2005). Stable And Efficient Electrophosphorescent Organic Light-Emitting Devices Grown By Organic Vapor Phase Deposition, Applied Physics Letters, 86(2).

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Hybrid Heterojunction Nanorods for Nanoscale Controlled

May 6, 2011· In this study, we report bulk heterojunction solar cells using hybrid heterojunction nanorods as photoactive material. The core–shell nanorods are obtained via self-assembly of low band gap p-type oligomers onto ZnO nanorod surfaces. This produces highly soluble donor–acceptor nanostructures that feature a grafted p-type semiconducting monolayer with a

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Tailor-Made Additives for Morphology Control in Molecular Bulk

Dec 3, 2012· Ternary-blend bulk-heterojunction solar cells have provided a unique opportunity for tuning the open-circuit voltage (Voc) as the "effective" highest occupied molecular orbital (HOMO) or

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Bulk Heterojunction Solar Cells: Morphology and

May 28, 2014· Bulk Heterojunction Solar Cells: Morphology and Performance Relationships Nonpolymer Organic Solar Cells: Microscopic Phonon Control to Suppress Nonradiative Voltage Loss via Charge-Separated State. 14.7%

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NREL/SR-520-42381 Efficiency Using Tandem Organic

2. "Controlled growth of a molecular bulk heterojunction photovoltaic cell," F. Yang, M. Shtein, and S. R. Forrest, Nat. Mater. 4, 39 (2005). This represents the first controlled structure for a bulk

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Morphology control in co-evaporated bulk heterojunction solar cells

Oct 1, 2013· Bulk heterojunction solar cells made by vacuum co-evaporation of polythiophene (PTh) and fullerene (C 60) are reported and the blend morphology control through donor–acceptor composition and post-situ annealing demonstrated -deposited heterojunctions are shown to generate about 60% higher photocurrents than their thickness-optimized PTh/C 60 planar

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Synthesis of model heterojunction interfaces reveals molecular

Aug 20, 2024· Control of the molecular configuration at the interface of an organic heterojunction is key to the development of efficient optoelectronic devices. Due to the difficulty in characterizing these

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[PDF] High-efficiency solution processable polymer photovoltaic cells

Converting solar energy into electricity provides a much-needed solution to the energy crisis the world is facing today. Polymer solar cells have shown potential to harness solar energy in a cost-effective way. Significant efforts are underway to improve their efficiency to the level of practical applications. Here, we report highly efficient polymer solar cells based on a bulk heterojunction

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Efficient bulk heterojunction photovoltaic cells using small-molecular

Oct 1, 2003· The power conversion efficiency of small-molecular-weight and polymer organic photovoltaic cells has increased steadily over the past decade. This progress is chiefly attributable to the

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NREL/SR-520-42381 Efficiency Using Tandem Organic

2. "Controlled growth of a molecular bulk heterojunction photovoltaic cell," F. Yang, M. Shtein, and S. R. Forrest, Nat. Mater. 4, 39 (2005). This represents the first controlled structure for a bulk heterojunction solar cell. The principle was to use organic vapor - phase deposition of CuPc on the ITO anode, adjusting the growth conditions to

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Molecular bulk heterojunctions: an emerging approach to organic

Jul 6, 2009· Results show that soluble molecular donors can lead to BHJ cells that combine high conversion efficiency with the distinct advantages of working with single molecules, including structural definition, synthesis, purification, and reproducibility. The predicted exhaustion of fossil energy resources and the pressure of environmental constraints are stimulating an

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Controlled growth of a molecular bulk heterojunction

Here, we present a method for growing crystalline organic fi lms into a controlled bulk heterojunction; that is, the positions and orientations of donor and acceptor materials are

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Bulk Heterojunction Solar Cells: Morphology and

May 28, 2014· Jing Yang, Peiqing Cong, Lie Chen, Xiaochen Wang, Jianfeng Li, Ailing Tang, Bao Zhang, Yanfang Geng, Erjun Zhou. Introducing Fluorine and Sulfur Atoms into Quinoxaline-Based p-type Polymers To Gradually Improve

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Bulk-heterojunction organic photovoltaic cells fabricated using a

Nov 21, 2012· Bulk-heterojunction organic photovoltaic cells fabricated using a high-viscosity solution of poly(3-hexylthiophene) with extremely high molecular weight Download PDF Rapid Communication

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Tailor-Made Additives for Morphology Control in Molecular Bulk

We apply this strategy as a means to predictably control morphology in molecular bulk-heterojunction (BHJ) photovoltaic cells. Through the use of an asymmetric oligomer substituted with a bulky triisobutylsilyl end group, the morphology of BHJ blends can be controlled resulting in a near doubling (from 1.3 to 2.2%) in power conversion efficiency.

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Controlled growth of a molecular bulk heterojunction photovoltaic

Dec 12, 2004· Here, we present a method for growing crystalline organic films into a controlled bulk heterojunction; that is, the positions and orientations of donor and acceptor materials are

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Nonfullerene Acceptor Molecules for Bulk Heterojunction Organic Solar Cells

Mar 20, 2018· The bulk-heterojunction blend of an electron donor and an electron acceptor material is the key component in a solution-processed organic photovoltaic device. In the past decades, a p-type conjugated polymer and an n-type fullerene derivative have been the most commonly used electron donor and electron acceptor, respectively. While most advances of

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Li, G., Shrotriya, V., Huang, J. S., Yao, Y., Moriarty, T., Emery, K

Oct 9, 2005· Converting solar energy into electricity provides a much-needed solution to the energy crisis the world is facing today. Polymer solar cells have shown potential to harness solar energy in a cost

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Optimization of Bulk Heterojunction Organic Photovoltaic Devices

Feb 14, 2019· The advent of bulk heterojunction (BHJ) solar cells based on the mixing of conjugated polymers and fullerene derivatives is a milestone in the journey of organic photovoltaics. This concept came up due to the failure in increasing efficiencies of other OPV structures due to excitons being generated too far from the planar heterojunction.

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Controlled growth of a molecular bulk heterojunction

heterojunction that serves to dissociate strongly bound photogenerated excitons1. Further effi ciency increases have been achieved in both polymer2,3 and small-molecular-mass4 organic photovoltaic cells through the use of the bulk heterojunction (BHJ), where the distance an exciton must diff use from its generation to its

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Morphology Characterization of Bulk Heterojunction Solar Cells

Feb 2, 2018· Revealing the nanostructure of bulk-heterojunction (BHJ) photovoltaic blends is a critical task in the field of organic photovoltaics. The complicated morphology, ranging from binary blends to ternary mixtures, shows quite varied structural details that need to be fully characterized in terms of correlating them with device performance.

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Fundamentals of bulk heterojunction organic solar cells: An

Mar 1, 2018· An ideal photovoltaic device should possess a consistent performance during its operational lifetime; however, organic semiconductors are often regarded as inherently unstable when they are subjected to the cyclic environmental changes [10].Undoubtedly, significant degradation pathways have been posited to occur at virtually every layer and interface of OSC

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Morphology Control in co-evaporated bulk heterojunction solar cells

Oct 1, 2013· Bulk heterojunction solar cells made by vacuum co-evaporation of polythiophene (PTh) and fullerene (C60) are reported and the blend morphology control through donor–acceptor composition and post

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About Controlled growth of a molecular bulk heterojunction photovoltaic cell

About Controlled growth of a molecular bulk heterojunction photovoltaic cell

The power conversion efficiency of organic photovoltaic cells has increased with the introduction of the donor–acceptor heterojunction that serves to dissociate strongly bound photogenerated excitons1. Furthe.

Bulk heterojunction devices are characterized by an interpenetrating network of donor and.

We thank J. Xue, S. Uchida, R. Holmes, B. Rand and P. Peumans for discussions. We also thank the US Air Force Office of Scientific Research, the National Renewabl.

Authors and AffiliationsDepartment of Electrical Engineering, Princeton Institute for the Science and Technology of Materials (PRISM), Princeton.

Cite this articleYang, F., Shtein, M. & Forrest, S. Controlled growth of a molecular bulk heterojunction photovoltaic cell. Nature Mater 4, 37.

Macro- and atomic-scale observations of a one-dimensional heterojunction in a nickel and palladium nanowire complexMasanori Wakizaka Shohei Kumagai Shinya Takaishi Na.

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