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What organic molecules have a relatively small work function, preferably in the visible spectrum? Polycyclic aromatic hydrocarbons are in the low UV spectrum, making it unsuitable for the photocathode requirement. A work function in the green-cyan spectrum, or anything below3 eV is the main focus. Efficiency, thermal stability, etc is not the main focus for the time being

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  • $\begingroup$ Look online for conjugated polymers. (I don't embark in a discussion or rant on the cons of using solid state physics concepts and words because it is a lost battle). $\endgroup$
    – Alchimista
    Commented Mar 2, 2021 at 9:42
  • $\begingroup$ Also it will be useful to have a frame. $\endgroup$
    – Alchimista
    Commented Mar 2, 2021 at 10:05
  • $\begingroup$ A work function in the green-cyan spectrum, or anything below3 eV is the main focus. Efficiency, thermal stability, etc is not the main focus for the time being $\endgroup$
    – Evamentality
    Commented Mar 3, 2021 at 0:02
  • $\begingroup$ I don't know any. An organic with a very low oxidation potential & availability is PEDOT. In it oxidised form it can be cast in film having a work function similar to gold. I am not aware of HOMO levels lying higher than that in readily handled organics. But shall be the cathode be photoactive? Your question isn't that clear. $\endgroup$
    – Alchimista
    Commented Mar 3, 2021 at 9:23
  • $\begingroup$ PEDOT has a work function of 5 eV, well into the UV spectrum. The main goal is a work function of 3 eV of below, all other factors are not of importance for the time being. $\endgroup$
    – Evamentality
    Commented Mar 3, 2021 at 23:57

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