Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Publication date: 1st March 2014
Organic solar cell is one of the most promising next-generation renewable energy technology due to the potentials of light weight, mechanical flexibility, easy and large production at low cost. However, its current efficiency is still on the way from the future commercialization. In our work, the integer charge transfer (ICT) model is successfully applied to optimize the organic solar cell efficiency, aiding in the design of loss-less electrode and effective donor-acceptor interface.[1,2,3] We explore the effects on open circuit voltage to minimize its loss, free charge generation and transport caused by ground-state charge transfer at donor-acceptor interfaces. We use the case of poly[2,3-bis-(3-octyloxyphenyl)quinoxaline-5, 8-dilyl-alt-thiophene-2, 5-diyl]: PCBM bulk heterojunction (BHJ) solar cell to test our design rules and comment on their match with other high performing materials in literature.[3] We finally describe the modification of the electronic structure of PCBM induced by ambient oxygen and water and comment on possible consequences in devices.[4]
[1] S. Braun, W. R. Salaneck, M. Fahlman,Energy-Level Alignment at Organic/Metal and Organic/Organic Interface, Adv.Mater. 2009, 21, 1450 [2] M. Fahlman, P. Sehati, W. Osikowicz, S. Braun, M. P. de Jong, G. Brocks, J. Electron Spectrosc. Relat. Phenom. Photoelectron spectroscopy and modeling of interface properties related to organic photovoltaic cells 2013, 190, 33 [3] Q.Y. Bao, et al, submitted. [4] Q. Y. Bao, X. J. Liu, S. Braun, M. Fahlman,Oxygen- and Water-Based Degradation in [6,6]-Phenyl-C 61 -Butyric Acid Methyl Ester (PCBM) Films Adv. Energy Mater. 2013, DOI: 10.1002/aenm.201301272
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International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
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