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Journal Article
9.2%-efficient core-shell structured antimony selenide nanorod array solar cells
2019
Overview
Antimony selenide (Sb
2
Se
3
) has a one-dimensional (1D) crystal structure comprising of covalently bonded (Sb
4
Se
6
)
n
ribbons stacking together through van der Waals force. This special structure results in anisotropic optical and electrical properties. Currently, the photovoltaic device performance is dominated by the grain orientation in the Sb
2
Se
3
thin film absorbers. Effective approaches to enhance the carrier collection and overall power-conversion efficiency are urgently required. Here, we report the construction of Sb
2
Se
3
solar cells with high-quality Sb
2
Se
3
nanorod arrays absorber along the [001] direction, which is beneficial for sun-light absorption and charge carrier extraction. An efficiency of 9.2%, which is the highest value reported so far for this type of solar cells, is achieved by junction interface engineering. Our cell design provides an approach to further improve the efficiency of Sb
2
Se
3
-based solar cells.
Antimony selenide is a promising thin film solar cell absorber material in which grain orientation is crucial for high device performance. Here Li et al. grow the material in nanorod arrays along the [001] direction and obtain record high efficiency of 9.2%.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
