Abstract:
Today, organic–inorganic perovskite hybrid solar cells are especially attracted by the energy industries to design and develop
new-generation photovoltaic devices. They are the most promising materials for high PCE and cheap solar cells. They can
also solve the current energy demand of society and the global crisis. Over the past few years, the power conversion ef ciency (PCE) of perovskite solar cells (PSCs) has increased rapidly from 3.8 to 24.2%. However, the review focuses on the
recent development of the electron transport layer due to the most important parameter perovskite solar cells to enhance the
performance and stability of the device. These summaries discuss device architectures, single and double electron transport
(ETL) layers, ETL optimization, and perovskite active layer interface for efcient perovskite solar cells. Moreover, the dop ing efects on the charge transport layer/window layers of PSCs were reviewed. In addition, the performance and stability
issues for organic–inorganic halide perovskite solar cells are discussed here. Finally, future research on bilayer ETL and the
perovskite active layer interface was also ofered.
