SCAPS 1d simulation of a High-Efficiency quantum dot solar cell using antimony selenide as an absorber layer

The target concept of nanotechnology in solar cell technology centers on improving energy conversion efficiency with a reduced production cost. Antimony selenide (Sb2Se3) can be used as an absorber layer for trapping solar energy owing to its unique properties, such as phase consistency, tunable bandgap, high absorption coefficient, and low-hazard nature. Quantum dot solar cells (QDSCs) have appeared as a promising alternative to traditional solar cells due to their hybrid composition, cost-effectiveness, and superior power conversion efficiency (PCE). Herein, the effect of Sb2 Se3 as an absorber layer on the conversion efficiency of the FTO/IGZO/CdS/Sb2 Se3 /PbS/Au QDSC is examined using the SCAPS-1D simulator. The examined parameters, such as absorber layer thickness, bandgap energy, defect density, and doping concentration, were analyzed. Through the simulation analysis, the results indicate that the optimal absorber thickness is 0.6 ???????? at 300 K, achieving a PCE of 36.11 %, fill factor (FF) of 73.14 %, short-circuit current density (JSC ) of 42.65 mA/cm2, and open-circuit voltage (VOC ) of 1.16 V. The results specify that an increase in the absorber layer doping concentration decreased the JSC but increased the VOC, FF, and PCE of the QDSC. The obtained PCE value for the proposed solar cell is above the  Shockley-Queisser (SQ) efficiency limit, in agreement with QDSCs due to multi-exciton generation (MEG). The findings suggest that QDSCs with proper optimization can achieve high efficiency and long-term stability, making them a viable option for future photovoltaic applications.

Jonathan Terseer Ikyumbur is a Physicist and researcher at Benue State University, Makurdi, Nigeria. He has spent over fifteen (15) years teaching in the College of Education and now in the University. Jonathan's research areas include dielectric properties of materials and materials simulation. Jonathan holds Ph.D in Solid State Physics from the Nigerian Defence Academy, Kaduna, Nigeria, a Master’s degree in Theoretical Physics, and a Bachelor’s of Science in Physics from Benue State University, Makurdi.