AI Article Synopsis
- A new, cost-effective co-axial electrospray method was developed to create a hybrid electron transporting material (ETM) made from a blend of TiO nanobeads and ZnO nanofibers for use in perovskite solar cells.
- This hybrid ETM shows a maximum power conversion efficiency (PCE) of 20.27%, setting a new record for hybrid ETMs, with minimal hysteresis and consistent performance across devices.
- Enhanced efficiency is attributed to the hybrid ETM's rapid electron diffusion and longer electron lifetime compared to traditional ETMs using only ZnO nanofibers or TiO nanobeads.
Article Abstract
We report a cost-effective and simple co-axial electrospray technique to fabricate a hybrid electron transporting material (ETM) consisting of a nanocomposite of hierarchically structured TiO nanobeads (NBs) blended with ZnO nanofibers (NFs), namely ZnO NFs + TiO NBs, for the first time ever. Owing to its large surface area, highly porous nature and fast electron transport, the hybrid ETM is further used in methylammonium lead iodide (CHNHPbI)-based perovskite solar cells (PSCs). The optimized cells utilizing the hybrid ETM exhibit a maximum power conversion efficiency (PCE) of 20.27%, the highest efficiency reported thus far for hybrid ETMs. Moreover, negligible hysteresis and highly reproducible values of PCE are observed for such cells. The PCE of devices based on the ZnO NF + TiO NB hybrid ETM is found to be far superior to that of only ZnO NF and hierarchically structured TiO NB-based ETMs. Light-induced transient measurement shows that the significantly rapid electron diffusion and longer electron lifetime of the ZnO NF + TiO NB hybrid ETM than of only ZnO NF and hierarchically structured TiO NB-based ETMs contribute to the enhanced efficiency in PSCs.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9419739 | PMC |
| http://dx.doi.org/10.1039/c8na00409a | DOI Listing |
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