About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
|
| Presentation Title |
Exploring Sn–Cu Mixed Perovskites: A Novel Approach to Lead-Free Photovoltaic Absorbers |
| Author(s) |
Ruth Adam, Sanjay Mathur, Shahzada Ahmad, Samrana Kazim, Ashish Kulkarni, Thomas Kirchartz, Benjamin Klingebiel, Luis Lezama |
| On-Site Speaker (Planned) |
Ruth Adam |
| Abstract Scope |
Sustainable alternatives to lead-based perovskite solar cells (PSCs) have spotlighted tin (Sn)-based perovskites due to their suitable bandgaps and reduced toxicity. However, their practical application is impeded by the facile oxidation of Sn2+ to Sn4+, leading to increased defect densities and diminished device performance. This study investigates the incorporation of copper (Cu2+) into the perovskite structure to stabilize the Sn2+ oxidation state and enhance the material's optoelectronic properties. A Sn–Cu mixed perovskite thin film was synthesized and characterized, revealing improved crystallinity and broader absorption spectra compared to single-metal counterparts. Preliminary photovoltaic measurements demonstrated a reproducible power conversion efficiency (PCE) of 0.06%. Surface analyses indicated partial oxidation of Sn2+ and reduction of Cu2+, suggesting redox interactions that may influence stability. These findings underscore the potential of Sn–Cu mixed perovskites as viable light absorbers in PSCs. |