Efficient Perovskite Solar Cells Based on CdSe/ZnS Quantum Dots Electron Transporting Layer with Superior UV Stability. Issue 6 (31st March 2020) - Tavakoli, Mohammad Mahdi
Abstract : Stability is the main challenge in the field of perovskite solar cells (PSCs). Finding new strategies is required to protect the PSCs from deteriorating agents such as humidity, heating, and illumination. Herein, a new electron transporting layer (ETL), i.e., CdSe/ZnS quantum dots (QDs), is proposed for the fabrication of efficient and stable PSCs. CdSe/ZnS QDs layer not only works as an ETL but also has downshifting property, which can improve both efficiency and stability of the PSCs. Using CdSe/ZnS QDs ETL with green emission, a PSC with maximum power conversion efficiency (PCE) of 18% is achieved. More importantly, the device shows great UV stability, much better than the device with TiO2 ETL, where it retains 90% of its initial PCE value after 75 h under continuous UV illumination. Abstract : CdSe/ZnS quantum dots layer with core–shell structure is a great electron transfer layer for the fabrication of high‐efficiency perovskite solar cells up to 18% and improving the UV stability of the device.