Issue

Vol. 11 (2019)

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

https://doi.org/10.1007/s40820-019-0284-y
Min‑cheol Kim
Global Frontier Center for Multiscale Energy Systems, Seoul National University, Seoul 151‑744, Republic of Korea
Segeun Jang
Department of Mechanical Engineering, Hanbat National University, Daejeon 34158, Republic of Korea
Jiwoo Choi
Global Frontier Center for Multiscale Energy Systems, Seoul National University, Seoul 151‑744, Republic of Korea
Seong Min Kang
Department of Mechanical Engineering, Chungnam National University, Daejeon 34134, Republic of Korea
Mansoo Choi
Global Frontier Center for Multiscale Energy Systems, Seoul National University, Seoul 151‑744, Republic of Korea

Corresponding Author: Mansoo Choi

mchoi@snu.ar.kr

Nano-Micro Letters, Vol. 11 (2019), Article Number: 53

Abstract

Large-area polydimethylsiloxane (PDMS) films with variably sized moth-eye structures were fabricated to improve the efficiency of perovskite solar cells. An approach that incorporated photolithography, bilayer PDMS deposition and replication was used in the fabrication process. By simply attaching the moth-eye PDMS films to the transparent substrates of perovskite solar cells, the optical properties of the devices could be tuned by changing the size of the moth-eye structures. The device with 300-nm moth-eye PDMS films greatly enhanced power conversion efficiency of ~ 21% due to the antireflective effect of the moth-eye structure. Furthermore, beautiful coloration was observed on the 1000-nm moth-eye PDMS films through optical interference caused by the diffraction grating effect. Our results imply that moth-eye PDMS films can greatly enhance the efficiency of perovskite solar cells and building-integrated photovoltaics.


Highlights:


1 Moth-eye structured polydimethylsiloxane (PDMS) films with different sizes were fabricated to improve the efficiency of perovskite solar cells.
2 The PDMS with 300-nm moth-eye films significantly reduced light reflection at the front of the glass and therefore enhanced the solar cell efficiency of ~ 21%.
3 The PDMS with 1000-nm moth-eye films exhibited beautiful coloration.








Keywords

Polydimethylsiloxane films Moth-eye Photolithography Perovskite solar cells Photovoltaic
Kim, Min‑cheol, Segeun Jang, Jiwoo Choi, Seong Min Kang, and Mansoo Choi. 2019. “Moth-Eye Structured Polydimethylsiloxane Films for High-Efficiency Perovskite Solar Cells”. Nano-Micro Letters 11 (June):53. https://doi.org/10.1007/s40820-019-0284-y.
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