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Issue 4, 2016
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SiO2/TiO2 based hollow nanostructures as scaffold layers and Al-doping in the electron transfer layer for efficient perovskite solar cells

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Abstract

Perovskite solar cells (PSCs) have been developed intensively recently due to their excellent efficiency. In this study, PSCs were fabricated using a hollow structure as a scaffold layer and Al doped TiO2 (Al-TiO2) as a compact layer. The hollow structure showed effective loading of perovskite (CH3NH3PbI3Cl3−x) on the working electrode of the PSCs. In particular, using SiO2/TiO2 hollow nanoparticles (STHNPs) instead of TiO2 hollow nanoparticles (THNPs) as insulators improved the open circuit voltage, because STHNPs did not allow photogenerated electrons to transfer easily from the perovskite. Al-TiO2 compact layers synthesized using a low temperature procedure (≤150 °C) promoted electron extraction and reduced the recombination, leading to enhanced power conversion efficiency (PCE). An optimum PCE of 14.7% was achieved for PSCs based on STHNP scaffold layers with Al doping in the electron transfer layer.

Graphical abstract: SiO2/TiO2 based hollow nanostructures as scaffold layers and Al-doping in the electron transfer layer for efficient perovskite solar cells

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Supplementary files

Article information


Submitted
14 Oct 2015
Accepted
07 Dec 2015
First published
09 Dec 2015

J. Mater. Chem. A, 2016,4, 1306-1311
Article type
Paper

SiO2/TiO2 based hollow nanostructures as scaffold layers and Al-doping in the electron transfer layer for efficient perovskite solar cells

J. Yun, J. Ryu, J. Lee, H. Yu and J. Jang, J. Mater. Chem. A, 2016, 4, 1306
DOI: 10.1039/C5TA08250A

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