Speaker
Description
Graphene oxide (GO) is a promising electron transport layer for organic photovoltaics (OPVs) due to its tunable surface chemistry and interfacial properties. In parallel, LiF nanoparticle interlayers are widely used to improve cathode contact behavior, as they provide morphological properties which contribute to energy level alignment in these devices. Here, we present a study which tests the performance of thermal release tape (TRT)-assisted GO transfer printing, both as an ETL and to transfer LiF nanoparticles under an Al electrode when spin coated on top of GO.
Devices are fabricated with the structure ITO/PEDOT:PSS/P3HT:PCBM/GO/LiF/Al. GO is introduced on top of the photoactive layer while also preserving the integrity of the active organic film. We compare multiple TRT types and release conditions to evaluate their influence on GO continuity, adhesion, O to C ratio, and effective thickness. LiF NPs are synthesized using a reverse micelle approach, where key processing parameters, including micelle loading ratio and spin-coating conditions, are systematically varied to tune NP density and distribution and relate them to different interlayer mechanisms.
Finally, photovoltaic performance in devices is measured under simulated AM1.5G illumination using current–voltage characterization to extract power conversion efficiency (PCE), short-circuit current density (Jsc), open-circuit voltage (Voc), and fill factor (FF). Trends in series and shunt resistance are analyzed to connect electrical performance to interfacial transport and recombination. By mapping device metrics against GO and LiF printing variables, this study establishes potential for carbon-based ETLs combined with nanoparticle-enabled cathode interface engineering.
| Keyword-1 | Graphene |
|---|---|
| Keyword-2 | LiF |
| Keyword-3 | OPV |