Harnessing Photovoltage: Effects of Film Thickness, TiO2Nanoparticle Size, MgO and Surface Capping with DSCs
Cheema, H; Delcamp, JH
| HERO ID | 4239764 |
|---|---|
| In Press | No |
| Year | 2017 |
| Title | Harnessing Photovoltage: Effects of Film Thickness, TiO2Nanoparticle Size, MgO and Surface Capping with DSCs |
| Authors | Cheema, H; Delcamp, JH |
| Volume | 9 |
| Issue | 3 |
| Page Numbers | 3050-3059 |
| Abstract | High photovoltage dye-sensitized solar cells (DSCs) offer an exceptional opportunity to power electrocatalysts for the production of hydrogen from water and the reduction of CO2to usable fuels with a relatively cost-effective, low-toxicity solar cell. Competitive recombination pathways such as electron transfer from TiO2films to the redox shuttle or oxidized dye must be minimized to achieve the maximum possible photovoltage (Voc) from DSC devices. A high Vocof 882 mV was achieved with the iodide/triiodide redox shuttle and a ruthenium NCS-ligated dye, HD-2-mono, by utilizing a combined approach of (1) modulating the TiO2surface area through film thickness and nanoparticle size selection, (2) addition of a MgO insulating layer, and (3) capping available TiO2film surface sites post film sensitization with an F-SAM (fluorinated self-assembled monolayer) treatment. The exceptional Vocof 882 mV observed is the highest achieved for the popular NCS containing ruthenium sensitizers with >5% PCE and compares favorably to the 769 mV value observed under common device preparation conditions. |
| Doi | 10.1021/acsami.6b11456 |
| Pmid | 28026928 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Journal: ACS applied materials & interfaces ISSN: 1944-8252 |
| Is Public | Yes |
| Language Text | English |