About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Energy Materials for Sustainable Development
|
| Presentation Title |
Performance Improvement of MXene-based Perovskite Solar Cells |
| Author(s) |
Hugo Lemos, Jessica Rossato, Silvia Fernandes, Carlos F.O. Graeff |
| On-Site Speaker (Planned) |
Carlos F.O. Graeff |
| Abstract Scope |
Perovskite Solar Cells is a promising technology for the next generation solar cells. In this work the incorporation of two-dimensional transition metal carbides and nitrides (MXenes) is shown to enhance the performance of Perovskite Solar Cells (PSC). We investigated the incorporation of Ti3C2Tx MXene into a solution processable electron transport layers for the double-cation mixed halide perovskite (Cs0.17FA0.83Pb(I0.83Br0.17)3) PSC [1]. The addition of MXene increased the power conversion efficiency (PCE) (19.46% for the champion device) and the stability (96% of its original PCE after 500 hours) compared to pristine devices. The improved performance of the Nb2O5–Ti3C2 devices (0.4 wt%) could be attributed to the adjusted alignment of the energy band between perovskite and ETL layers, which promotes electron transport and extraction. Additionally, the high electrical conductivity of MXenes provided a free pathway for the extracted electrons, preventing charge recombination.
[1] Lemos et al, J. Mater. Chem. C, 2023,11, 3571-3580. |