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Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids
Published on: August 23, 2012
A composite nanostructured electron-transport layer for stable hole-conductor free perovskite solar cells: design and
Zhenhua Yu1, Fei Qi1, Pei Liu1
1School of Physics and Technology, Wuhan University, Wuhan 430072, China. wliu@whu.edu.cn guoshishang@hotmail.com xzzhao@whu.edu.cn.
Abstract:
A novel composite nanostructured titanium dioxide (TiO2) based electron-transport layer (ETL) is designed by combining size blended nanoparticles (SBNP) and nanoarrays (NA) for efficient perovskite solar cell (PSC) applications. The composite nanostructured (SBNP + NA) ETL is successfully employed in hole-conductor free PSCs, there by achieving a stable device with a maximum efficiency of 13.5%. The improvement in the performance is attributed to the better charge transport and lower recombination in the SBNP + NA ETL. Despite the stable high efficiency, SBNP + NA ETL based PSCs are advantageous owing to their low cost, ease of all-solution fabrication process in an open environment and good reproducibility.
