18September2019

Nano-Micro Letters

Moth-eye Structured Polydimethylsiloxane Films for High-Efficiency Perovskite Solar Cells

Min-cheol Kim1, 2,, Segeun Jang3,, Jiwoo Choi1, 2, Seong Min Kang4,*, Mansoo Choi1, 2,*

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Nano-Micro Lett. (2019) 11: 53

First Online: 25 June 2019 (Article)

DOI:10.1007/s40820-019-0284-y

*Corresponding author. E-mail: smkang@cnu.ac.kr (Seong Min Kang); mchoi@snu.ar.kr (Mansoo Choi)

 

Abstract

 


Toc

We report the fabrication of polydimethylsiloxane (PDMS) films with variably sized moth-eye structures and their effective utilization in efficient perovskite solar cells. Large-area conical moth-eye PDMS pads were fabricated by a process that incorporated photolithography, bilayer PDMS deposition, and replication. By simply attaching the moth-eye PDMS pads to the transparent substrates of perovskite solar cells, the optical properties of the devices could be altered. These changes depended on the size of the moth-eye structures. Devices made with 300-nm moth-eye PDMS pads exhibited greatly enhanced power conversion efficiency, reaching ~21% thanks to the antireflective effect of the moth-eye structure. Furthermore, the 1000-nm moth-eye PDMS pads created beautiful coloration through optical interference caused by the diffraction grating effect. This implies that moth-eye PDMS films can be applied to highly efficient perovskite solar cells and building-integrated photovoltaics.


 

Keywords

Light harvesting; Building-integrated photovoltaic; Anti-reflection; Diffraction grating; Biomimetic soft lithography; Perovskite solar cells

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