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SiO2 nanoparticle-regulated crystallization of lead halide perovskite and improved efficiency of carbon-electrode based, low temperature planar perovskite solar cells by Liang, Zerong; Yang, Bingchu; Mei, Anyi; Lin, Siyuan; Han, Hongwei; Yuan, Yongbo; Xie, Haipeng; Gao, Yongli; Zhou, Conghua is a Physics and Astronomy article available to read on EtoBox.

What is SiO2 nanoparticle-regulated crystallization of lead halide perovskite and improved efficiency of carbon-electrode based, low temperature planar perovskite solar cells about?

SiO~2~ nanoparticles were used to regulate the crystallizing process of lead halide perovskite films prepared by the sequential deposition method, which was used in the low-temperature-processed, carbon-electrode-basing, hole-conductor-free planar perovskite solar cells. It was observed that, after adding small amount of SiO~2~ precursor (1 vol%) into the lead iodide solution, performance parameters of open-circuit voltage, short-circuit current and fill factor were all upgraded, which helped to increase the power conversion efficiency (reverse scan) from 11.44(± 1.83)% (optimized at 12.42%) to 14.01(±2.14)% (optimized at 15.28%, AM 1.5G, 100 mW/cm^2^). Transient photocurrent decay curve measurements showed that, after the incorporation of SiO~2~ nanoparticles, charge extraction was accelerated, while transient photovoltage decay and dark current curve tests both showed that recombination was retarded. The improvement is due to the improved crystallinity of the perovskite film. X-ray diffraction and scanning electron microscopy studies observed that, with incorporation of amorphous SiO~2~ nanoparticles, smaller crystallites were obtained in lead iodide films, while larger crystalli

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Author

Liang, Zerong; Yang, Bingchu; Mei, Anyi; Lin, Siyuan; Han, Hongwei; Yuan, Yongbo; Xie, Haipeng; Gao, Yongli; Zhou, Conghua

Publisher

IOP Publishing; Institute of Physics Publishing (ISSN 1674-1056)

Published

2020

Language

EN

Field

Physics and Astronomy (Physical Sciences)