| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
2024 Undergraduate Student Poster Contest
|
| Presentation Title |
SPU-35: Solvent Effect of Solution-Processed Electron Transport Layer on Organic Photovoltaics Performance |
| Author(s) |
Souk Yoon Kim, Pimmada Sawangwong, Nutifafa Yao Doumon |
| On-Site Speaker (Planned) |
Pimmada Sawangwong |
| Abstract Scope |
The higher compatibility between electron transport layer (ETL) and active layer leads to more efficient electron transport and extraction at the cathode in organic photovoltaics (OPVs). A fluorinated perylene diimide (PDI) based small molecule is recently developed to be processable in both polar and nonpolar green solvent, which expands the choices of materials and processing of ETL materials. Yet there are limited reports on effects of nonpolar solvent-processed ETL on the efficiency and stability of OPVs. The polar solvents are methanol and 1-butanol, and the nonpolar solvent is heptane. The efficiencies of devices processed with polar and nonpolar solvents are comparable, showing 15% and 13%, respectively. However, there is a significant difference in the stabilities; the nonpolar solvent processed exhibits a lower shelf stability. This research aims to understand the degradation mechanisms of ETL materials in nonpolar solvent which is crucial towards achieving higher performance in OPV technology. |