In-situ laser fabrication of graphene electrodes and interlayers for next generation CIGS/Perovskite solar cells
| Reference number | |
| Coordinator | Karlstads universitet - Institutionen för ingenjörsvetenskap och fysik |
| Funding from Vinnova | SEK 4 591 227 |
| Project duration | December 2019 - June 2023 |
| Status | Completed |
Important results from the project
LASERGRAPH aims to boost the efficiency and stability of CIGS/Perovskite PV devices by incorporating graphene-related material (GRM) interlayers. Novel laser-based techniques are employed for post-fabrication processing of GRM, followed by advanced characterization and simulation methods for integration into tandem solar cells.
Expected long term effects
Laser-reduced graphene oxide (GO) was prepared, followed by advanced characterization of composition and energy levels, simulation of its properties, and integration into tandem solar cells. The project has led to optimised GO deposition, improved optical and electrical properties of laser-reduced rGO films, improved energy level alignment at the perovskite/hole transport layer interfaces, and incorporation of rGO layers in CIGS/Perovskite solar cells. However, while the Voc and FF of the cells were enhanced the current and overall efficiencies were low.
Approach and implementation
The project team is composed of five partners: the Foundation of Research and Technology-Hellas (FORTH) in Greece, Hasselt University (HASS) and the Interuniversity Micro-Electronics Centre (IMEC) in Belgium, Karlstad University (KAU) in Sweden, and the University of Ljubljana in Slovenia. The role of KAU in the project is the characterization of the composition and energy levels of materials and at interfaces, using photoemission and absorption spectroscopy (UPS, XPS and XAS) and scanning probe microscopies and other related techniques.