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Solar Energy Materials & Solar Cells - Stanford University

Jul 26, 2016· solar cell to degrade 80% after it is burned-in [14]. There are five primary stresses that have been identified to shorten the lifetime of organic solar cells: oxygen, moisture, heat, UV light and visible-near infrared light [11,15–19]. In air, a crystalline and dense neat polymer film photo-oxidizes and bleaches more slowly than an

Molecular Chromophore-DNA Architectures With Fullerenes

The fullerenes with the 2′-deoxyuridine moieties enhance the quantum efficiency of the conversion process significantly, demonstrating the potential of DNA as structural element for ordering chromophores into functional π-systems, which may be employed in future organic solar cells.

Light-induced degradation of fullerenes in organic solar

We find that trap states formed in the fullerene phase under illumination play a critical role in the degradation of the open-circuit voltage (V OC) in OSCs. Our results indicate that the degradation is intrinsic to the fullerenes in OSCs and that alternative acceptor materials are desired for the development of stable OSCs.

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Journal of Mas Chemterl ia y trAis

In this paper, we investigate the light-induced degradation mechanisms in a classical fullerene-based OSC blend solar cell, i.e. poly [2,3-bis-(3-octyloxyphenyl)quinoxaline-5,8-diyl-alt-thiophene-

Light-induced degradation of a push–pull copolymer for …

Oct 19, 2020· An ITO-free organic solar cell was fabricated based on P1 donor and PC 71 BM acceptor. An almost complete bleaching of absorption in less than 50 h of light exposure was found in pristine P1 film. This fast light-induced degradation is due to chain scissioning and intramolecular bond breaking within the single copolymer unit.

Light-induced degradation of fullerenes in organic solar

Light-induced degradation of fullerenes in organic solar cells: a case study on TQ1:PC71BM By Yuming Wang, Mohammad Javad Jafari, Nana Wang, Deping Qian, Fengling Zhang, Thomas Ederth, Ellen Moons, Jianpu Wang, Olle Inganäs, Wei Huang and Feng Gao

Light-induced degradation of fullerenes in organic solar

We find that trap states formed in the fullerene phase under illumination play a critical role in the degradation of the open-circuit voltage (V-OC) in OSCs. Our results indicate that the degradation is intrinsic to the fullerenes in OSCs and that alternative acceptor materials are …

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Title: The Role of Fullerenes in the Environmental

we identify a degradation pathway that is relevant to many designs of organic and perovskite solar cells, namely, the photochemical oxidation of fullerenes under exposure to ambient light, and show that the effects on charge transport, device photovoltage, and current-voltage characteristic can be

Stability of organic solar cells with PCDTBT donor polymer

Stability of organic solar cells with PCDTBT donor polymer: An interlaboratory study - Volume 33 Issue 13 - Laura Ciammaruchi, Ricardo Oliveira, Ana Charas, Tulus, Elizabeth von Hauff, Giuseppina Polino, Francesca Brunetti, Rickard Hansson, Ellen Moons, Miron Krassas, George Kakavelakis, Emmanuel Kymakis, José G. Sánchez, Josep Ferre-Borrull, Lluis F. Marsal, Simon Züfle, Daniel Fluhr

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Organic solar cells: Degradation processes and …

Organic solar cells: Degradation processes and approaches to enhance performance Fadzai Fungura Iowa State University Follow this and additional works at:https://lib.dr.iastate.edu/etd Part of theElectrical and Electronics Commons,Materials Science and Engineering Commons, Mechanics of Materials Commons, and thePhysics Commons

Light-induced degradation of fullerenes in organic solar

For instance, new sub-band gap trap states were identified in polymer donor materials after exposure to light, and the light-induced new traps can broaden the density of states, decreasing the V OC. 16,17 In addition, the ultraviolet (UV) region of the spectrum can trigger the photochemical reaction between the polymer donor materials and the fullerene, resulting in irreversible degradation of the active layer. …

Toward improved environmental stability of polymer

With the emergence of nonfullerene electron acceptors resulting in further breakthroughs in the performance of organic solar cells, there is now an urgent need to understand their degradation mechanisms in order to improve their intrinsic stability through better material design. In this study, we present quantitative evidence for a common root cause of light-induced degradation of polymer

New insights into polymer solar cells stability: The

New insights into polymer solar cells stability: The crucial role of PCBM oxidation - Volume 33 Issue 13 - Anthony Perthué, Thérèse Gorisse, Hugo Santos Silva, Christian Lombard, Didier Bégué, Piétrick Hudhomme, Brigitte Pépin-Donat, Agnès Rivaton, Guillaume Wantz

Operational Stability and Charge Transport in Fullerene

The performance of organic solar cells with planar C60 layers degrades rapidly under illumination, which is found to result from photo-oligomerization of adjacent C60 monomers. An analytical model based on reduced Slovakiaiton diffusion length in the oligomerized C60 layer is developed to describe the device degradation, which fits the observed loss.

Plasmon-enabled degradation of organic micropollutants in

Jul 07, 2020· The presence of organic micropollutants, resulting from pesticide, solvent, detergent, or pharmaceutical use, in drinking water sources poses a significant threat to human health. Degrading these dangerous pollutants using advanced oxidation processes is a desirable but highly energy-intensive treatment option. Here, we report the solar oxidation of organic micropollutants, facilitated by

A compact physical model for morphology induced intrinsic

Jul 19, 2011· The gradual loss of efficiency during field operation poses a fundamental challenge for economic viability of any solar cell technology. Well known examples include light-induced degradation in Si-based cell (Staebler-Wronski effect), Cu diffusion in thin film (copper indium gallium selenide) cell, hot-spot degradation in series connected modules, etc. Here we develop a compact model for an

Performance enhancement of fullerene-based solar cells …

Jul 29, 2013· A key challenge to the commercialization of organic bulk heterojunction solar cells is the achievement of morphological stability, particularly under thermal stress conditions. Here we show that a

Organic Solar Cells: Degradation Processes and Approaches

The photobleaching dynamics of a series of three organic photovoltaic (OPV) donor polymers and five different fullerenes are presented. The fullerenes studied include PC 60 BM and four perfluoroalkylfullerenes with relatively large electron affinities, namely C 60 (CF 3) 2, C 60 (i-C 3 F 7) 2, C 60 (CF 3) 4, and C 60 (CF 3) 8.The donor polymers were all based on cyclopentadithiophene (CPDT

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Toward Improved Environmental Stability of Polymer

Organic Solar Cells: A Common Energetic we present quantitative evidence for a common root cause of light-induced degradation of polymer:nonfullerene and polymer:fullerene organic solar cells in air, namely, a fast photo-oxidation process of the photoactive materials degradation of fullerenes, primarily through a light-induced oxidation

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Organic solar cells: Degradation processes and …

Organic solar cells: Degradation processes and approaches to enhance performance Fadzai Fungura Iowa State University Follow this and additional works at:https://lib.dr.iastate.edu/etd Part of theElectrical and Electronics Commons,Materials Science and Engineering Commons, Mechanics of Materials Commons, and thePhysics Commons

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Investigation of Degradation in Polythiophene …

1.1 Organic Solar Cells 1 1.2 Poly(3-hexylthiophene) and its properties 3 1.3 Fullerenes and their properties 5 1.4 Literature survey of degradation mechanisms in P3HT in solution 7 1.5 The degradation of P3HT-based devices 9 1.6 Modeling device degradation - Accelerated Lifetime Testing 11 1.7 Preventing device degradation 13

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Depositing Fullerenes in Swollen Polymer Layers via

Organic photovoltaics (OPV) form a promising renewable energy technology. Recently, the effi ciency of OPV has increased considerably, now reaching over 10% for polymer:fullerene based solar cells. [ 1 ] Also, studies on degradation mechanisms Adv. Energy Mater. 2015, 5, 1500464 www.MaterialsViews.com www.advenergymat.de

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The Role of Fullerenes in the Photo-degradation of …

In the first part of this thesis, we investigate the degradation of organic solar cells under photo-oxidative conditions. Firstly, a correlation between fullerene electron affinity and device degradation is established for a series of eight different fullerenes. A fullerene LUMO

Analysis of light-induced degradation of organic-inorganic

Organic–inorganic halide perovskites have been studied intensively in recent years, for applications in solar cells. Many studies have been reported on the light-induced phenomena for Organic–inorganic halide perovskite materials and solar cells until now. We investigate the light-induced degradation of organic–inorganic halide perovskite solar cells, using multiple techniqu...

A compact physical model for morphology induced intrinsic

The gradual loss of efficiency during field operation poses a fundamental challenge for economic viability of any solar cell technology. Well known examples include light-induced degradation in Si-based cell (Staebler-Wronski effect), Cu diffusion in thin film (copper indium gallium selenide) cell, hot-spot degradation in series connected modules, etc. Here we develop a compact model for an

Light-induced degradation of fullerenes in organic solar

Light-induced degradation of fullerenes in organic solar cells: a case study on TQ1:PC71BM By Yuming Wang, Mohammad Javad Jafari, Nana Wang, Deping Qian, Fengling Zhang, Thomas Ederth, Ellen Moons, Jianpu Wang, Olle Inganäs, Wei Huang and Feng Gao

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