Insight into Evolution, Processing and Performance of Multi-length-scale Structures in Planar Heterojunction Perovskite Solar Cells

Scientific Reports
Yu-Ching HuangHao-Wu Lin

Abstract

The structural characterization correlated to the processing control of hierarchical structure of planar heterojunction perovskite layer is still incomplete due to the limitations of conventional microscopy and X-ray diffraction. This present study performed the simultaneously grazing-incidence small-angle scattering and wide-angle scattering (GISAXS/GIWAXS) techniques to quantitatively probe the hierarchical structure of the planar heterojunction perovskite solar cells. The result is complementary to the currently microscopic study. Correlation between the crystallization behavior, crystal orientation, nano- and meso-scale internal structure and surface morphology of perovskite film as functions of various processing control parameters is reported for the first time. The structural transition from the fractal pore network to the surface fractal can be tuned by the chloride percentage. The GISAXS/GIWAXS measurement provides the comprehensive understanding of concurrent evolution of the film morphology and crystallization correlated to the high performance. The result can provide the insight into formation mechanism and rational synthesis design.

References

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Citations

May 27, 2016·ACS Nano·Yinghong HuPablo Docampo
Mar 2, 2021·ACS Applied Energy Materials·Edwin Pineda De La OAlan D F Dunbar
Sep 10, 2020·ACS Applied Energy Materials·Noura AlhazmiAlan D F Dunbar

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Methods Mentioned

BETA
scanning
atomic force microscopy
X-ray
AFM

Software Mentioned

GISAXS
GIWAXS

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