| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
|
| Presentation Title |
Panchromatic Light Absorption in CdSe/CdS Coated SnO2 Nanowires for Solar-fuel Conversion |
| Author(s) |
Salim Caliskan, Jung-Kun Lee |
| On-Site Speaker (Planned) |
Jung-Kun Lee |
| Abstract Scope |
In the solar-fuel conversion process, the low charge collection efficiency and thermalization loss of a photoelectrode are common problems which limit the photoelectrochemical (PEC) performance. To address this problem, different sequential coating methods were employed to sensitize SnO2 nanowires (NWs) and Sb-SnO2 NWs and the effect of the sequential coating sequence and NW electric conductivity on PEC performance was examined. In comparison to the traditional radial sequential coating (RSC), longitudinal sequential coating (LSC) increased the photocurrent density of coated NWs by 30 %. Since high energy and low energy photons are absorbed by different parts of NWs, the improvement of the photocurrent is attributed to higher conversion rate and low thermalization loss of high energy photons to electricity in LSC NWs. Our recent study shows that the sequential coating of different bandgap sensitizers along the longitudinal direction on highly conductive NWs paves a way toward highly efficient solar-fuel conversion. |