Judges’ Queries and Presenter’s Replies

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Presentation Discussion

  • May 21, 2012 | 11:53 p.m.

    nice video and poster.

    so what end applications will your material system address? I presume that photovoltaics is a platform technology and that the end application may determine the material system?

  • Icon for: Roy Murray

    Roy Murray

    May 22, 2012 | 12:20 p.m.

    This method of analysis of organic photovoltaics (OPV) is very simple to perform using measurements that everyone from academics to industry already takes. I think the materials used in OPV will continue to progress, but I hope my research will be useful as a characterization tool as new materials are synthesized.
    Thanks for viewing! I hope this answered your question, but if not please let me know.

  • Icon for: Michael Mayeda

    Michael Mayeda

    May 22, 2012 | 09:39 a.m.

    looks good!

  • Icon for: Roy Murray

    Roy Murray

    May 22, 2012 | 06:04 p.m.


  • Icon for: Cory Budischak

    Cory Budischak

    May 22, 2012 | 03:59 p.m.

    Nice work on this. I have one question. You imply that the OPV community does not routinely use this characterization technique. Why do you think that is the case?

  • Icon for: Roy Murray

    Roy Murray

    May 23, 2012 | 11:06 p.m.

    I think that the OPV community is currently more concerned with efficiency and new materials because that is what will drive this technology towards commercialization. This technique emerged from traditional PV such as amorphous silicon and CIGS once they were relatively well developed technologies. I think the OPV community could stand to benefit from implementing this technique now, but once OPV matures and a good, stable material front runner emerges, it will probably emerge organically.
    Thanks for reading!

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    Burak Kaynar

    May 23, 2012 | 03:51 a.m.

    a fast but good video about device preparation
    Also TEM images are so good
    nice work

  • Icon for: Roy Murray

    Roy Murray

    May 23, 2012 | 11:07 p.m.

    Thanks Burak! Glad you liked it

  • May 23, 2012 | 10:22 a.m.

    Looks good! I like that you take us through all of the assembly steps in the video and I like your TEM!

  • Icon for: Roy Murray

    Roy Murray

    May 23, 2012 | 11:08 p.m.

    Thanks! I’m glad you liked the video, but my labmate Nopporn deserves the credit for the TEM.

  • Icon for: Robert Opila

    Robert Opila

    May 25, 2012 | 06:24 a.m.

    Roy—good job—have you done quantum efficiency on these?

  • Further posting is closed as the competition has ended.

Icon for: Roy Murray


University of Delaware
Years in Grad School: 3

Heat saves the day: A novel analysis of diode parameters of P3HT:PCBM Organic Photovoltaics

Current-voltage (JV) analysis of poly (3-hexlythiophene) (P3HT) and phenyl-C61-butyric acid methyl ester (PCBM) organic photovoltaics (OPV) yield valuable insight into the internal physics of devices. A simple lumped circuit model, previously used to analyze conventional thin film photovoltaics and more recently applied to OPV has been used to study annealing parameters. A study of annealing P3HT:PCBM blend OPVs was carried out and the data was analyzed using the lumped circuit model. Limiting carrier lifetime-mobility product information and barrier data were extracted from the JV analysis of these devices. Collection loss characteristics were also obtained. The OPV community will benefit from applying this simple model as a method of standardizing measurements from JV curves, as was done routinely with inorganic PV.