Journal
NANOSCALE
Volume 8, Issue 5, Pages 2664-2677Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nr07395b
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Funding
- Priority Research Centers Program through National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [2009-0094055]
- Basics Science Research Program through the National Foundation of Korea (NRF) - Ministry of Education [NRF-2014R1A2054051]
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We have demonstrated organometallic perovskite solar cells (PSCs) based on Au decorated TiO2 nanofibers and methylammonium lead iodide (MAPbl(3)). A power conversion efficiency of 14.92% was achieved, which is significantly higher than that of conventional mesoporous (mp) TiO2, as well as TiO2 nanofiber-based devices. The present synthetic process provides new opportunities for the development of efficient plasmonic PSCs based on metal oxide nanofibers. Solar cells based on these architectures exhibit a short-circuit current density J(SC) of 21.63 +/- 0.36 mA cm(-2), V-OC of 0.986 +/- 0.01 V and fill factor of 70% +/- 3%, which provide a power conversion efficiency of 14.92% +/- 0.33% under standard AM 1.5 conditions. The results of time-resolved photoluminescence (TRPL) spectroscopy and solid-state impedance spectroscopy (ssIS) revealed that PSCs based on Au-decorated TiO2 nanofibers exhibit a low recombination rate. The present results are much higher than those for reported PSCs based on a Au@TiO2 electron-transporting layer (ETL).
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