Organometallic dimers: application to work-function reduction of conducting oxides
Giordano, AJ; Pulvirenti, F; Khan, TM; Fuentes-Hernandez, C; Moudgil, K; Delcamp, JH; Kippelen, B; Barlow, S; Marder, SR
| HERO ID | 2902220 |
|---|---|
| In Press | No |
| Year | 2015 |
| Title | Organometallic dimers: application to work-function reduction of conducting oxides |
| Authors | Giordano, AJ; Pulvirenti, F; Khan, TM; Fuentes-Hernandez, C; Moudgil, K; Delcamp, JH; Kippelen, B; Barlow, S; Marder, SR |
| Journal | ACS Applied Materials & Interfaces |
| Volume | 7 |
| Issue | 7 |
| Page Numbers | 4320-4326 |
| Abstract | The dimers of pentamethyliridocene and ruthenium pentamethylcyclopentadienyl mesitylene, (IrCp*Cp)2 and (RuCp*mes)2, respectively, are shown here to be effective solution-processable reagents for lowering the work functions of electrode materials; this approach is compared to the use of solution-deposited films of ethoxylated poly(ethylenimine) (PEIE). The work functions of indium tin oxide (ITO), zinc oxide, and gold electrodes can be reduced to 3.3-3.4 eV by immersion in a toluene solution of (IrCp*Cp)2; these values are similar to those that can be obtained by spin-coating a thin layer of PEIE onto the electrodes. The work-function reductions achieved using (IrCp*Cp)2 are primarily attributable to the interface dipoles associated with the formation of submonolayers of IrCp*Cp(+) cations on negatively charged substrates, which in turn result from redox reactions between the dimer and the electrode. The electrical properties of C60 diodes with dimer-modified ITO cathodes are similar to those of analogous devices with PEIE-modified ITO cathodes. |
| Doi | 10.1021/am5087648 |
| Pmid | 25685873 |
| Wosid | WOS:000350193000054 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Journal: ACS applied materials & interfaces ISSN: 1944-8252 |
| Is Public | Yes |
| Language Text | English |
| Keyword | work function; dopant; electron injection; indium tin oxide; poly(ethylenimine); iridocene |