Solution processed organic photovoltaics

Hoth, C.N., SchUinsky, R, Chouhs, S.A., Balasubramanian, S., Brabec, C.J., 2013. Solution-processed organic photovoltaics. In Cantatore, E. (Ed.), Apphcations of Organic Rrinted Electronics A Technology-enabled Revolntion. Springer, New York. 

Solution Processed Organic Photovoltaics (OPVs] Partobte Devices... 

Li G., Shrotriya V., Huang J., Yao Y., Moriarty T., Emery K. and Yang Y., High-efficiency solution processable polymer photovoltaic cells by self-organization of polymer blends . Nature Materials 4, 864—868. 

G. Li, V. Shrotriya, J. Huang, Y. Yao, T. Moriarty, K. Emery, Y. Yang, High-EfRciency Solution Processable Polymer Photovoltaic Cells by Self-Organization of Polymer Blends. Nat. Mater 2005,4,864-868. 

However, only small changes have a pronounced impact on the morphology of bulk heterojunction thin films as well as their charge carrier separation and transportation. This in turn influences the photovoltaic properties of the small molecule-based bulk heterojunction devices. Solution-processed organic solar cells based on the molecules with the shortest methyl end groups exhibit a high short circuit current and fill factor (128). 

Herein, we describe recent developments in the use of porphyrins and phthalocyanines in the field of optical and electronic materials, the properties of which are mainly controlled by molecular self-assembly. Photovoltaic cells are currently of broad interest as potential low-cost approaches to solar energy conversion. Large-area electronic devices and solution-processed organic semiconductors based on porphyrins, phthalocyanines, and other molecules could have potentially a huge cost advantage over Si-based devices if conversion efficiency and durability can be improved to the level of Si-solar cells. We are now approaching this goal as shown herein, where supramolecules based on porphyrins and phthalocyanines may play crucial roles. 

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