Researchers from India's Madan Mohan Malaviya University of Technology, University of Delhi, Manipal University and Sweden's IAAM have combined 2D and 3D perovskites to strengthen both reliability and efficiency of 3D perovskite solar cells (PSCs).
The team explored the combined effect of Dion-Jacobson (DJ) 2D-3D halide-based perovskites layers on device performance. The DJ 2D material used was PeDAMA4Pb5I16, while the 3D material is the lead-free, stable CsGeI3-xBrx (with x=1). The optimized solar cell structure developed in this work consisted of (Au/Cu2O/PeDAMA4Pb5I16/CsGeI3-xBrx/PCBM/FTO).
A thorough analysis was performed on the impact of various ETLs and HTLs, as well as factors such as defect density (Nt), 2D-3D layer thickness, shallow acceptor density (NA), series (RS) and shunt resistances (RSh), and temperature variations.
In this recent work, PCE has reportedly significantly improved, reaching an impressive 31.16%. Other noteworthy metrics include a JSC 22.55 mA.cm-2, FF 88.47% and VOC 1.5617 V, all demonstrating excellent performance.
These results highlight the effectiveness of the approach in strengthening the efficiency and performance of DJ 2D-3D PSCs, highlighting their potential for future applications.
