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Highly Efficient Solar Cells Using Organic Dyes with Amorphous Moiety

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Abstract

Novel organic sensitizers comprising donor; electron-conducting, and anchoring groups were engineered at molecular level and synthesized. The functionalized unsymmetrical organic sensitizers 3-{5-[N,N-Bis(9,9-dimethylfluorene-2-yl)phenyl]-thiophene-2-yl}-2-cyano-acrylic acid (JK-1) and 3-{5’-[N,N-Bis(9,9-dimethylfluorene-2-yl)phenyl]-2,2’-bithiophene-5-yl}-2-cyano-acrylic acid (JK-2), upon anchoring onto TiO2 film exhibit unprecedented incident photon to current conversion efficiency 91 %. The photovoltaic data using an electrolyte having composition of 0.6M M-methyl-N-butyl imidiazolium iodide, 0.04 M iodine, 0.025 M LiI, 0.05M guanidinium thiocyanate and 0.28 M tert.butylpyridine in 15/85 (v/v) mixture of valeronitrile and acetonitrile revealed a short circuit photocurrent density of 14.0 mA/cm2, an open circuit voltage of 753 mV and a fill factor of 0.76, corresponding to an overall conversion efficiency of 8.01 % under standard AM 1.5

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Authors and Affiliations

  1. Korea University, Chungcheongnam-do, 339-700, Korea

    Sanghoon Kim, Jae Kwan Lee, Il Jung, Kyu-Ho Song, Chul Baik, Hyunbong Choi, Duckhyun Kim & Jaejung Ko

  2. Università di Perugia, Perugia, I-06123, Italy

    S. Fantacci & F. De Angelis

  3. Swiss Federal Institute of Technology, Lausanne, CH, 1015, Switzerland

    J. H. Yum, Md. K. Nazeeruddin & M. Graetzel

Authors
  1. Sanghoon Kim
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  2. Jae Kwan Lee
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  3. Il Jung
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  4. Kyu-Ho Song
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  5. Chul Baik
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  6. Hyunbong Choi
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  7. Duckhyun Kim
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  8. S. Fantacci
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  9. F. De Angelis
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  10. J. H. Yum
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  11. Md. K. Nazeeruddin
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  12. M. Graetzel
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  13. Jaejung Ko
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Kim, S., Lee, J.K., Jung, I. et al. Highly Efficient Solar Cells Using Organic Dyes with Amorphous Moiety. MRS Online Proceedings Library 974, 803 (2006). https://doi.org/10.1557/PROC-0974-CC08-03

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  • DOI: https://doi.org/10.1557/PROC-0974-CC08-03

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