Investigation of Electron Transport Material-Free Perovskite/CIGS Tandem Solar Cell

Tandem solar cells have a superb potential to push the power conversion efficiency (PCE) of photovoltaic technologies. They can be also more stable and economical. In this simulation work, an efficient perovskite solar cell (PSC) with Spiro-OMeTAD as a hole transport material (HTM) and with no electron transport material (ETM) to replace the traditional PSC structure is presented. This PSC is then used as a top sub cell together with a copper indium gallium sulfide (CIGS) bottom sub cell to build a tandem cell. The multi-junction solar cell behavior is improved by engineering the technological and physical parameters of the perovskite and HTM. The results show that an n-p heterojunction PSC structure with an ETM free could be a good candidate for the traditional n-i-p structure. Because of such investigations, the performance of the proposed ETM-free PSC/CIGS cell could be designed to reach a PCE as high as 35.36%.

Automated summary

Tandem solar cells have the potential to improve the power conversion efficiency of photovoltaic technologies and offer stability and cost effectiveness. This study presents an efficient perovskite solar cell with Spiro-OMeTAD as the hole transport material and no electron transport material to replace the traditional structure. The results show that this structure could be a good candidate for the traditional n-i-p structure, with a potential PCE of 35.36%.