Aesthetics is just as important as efficiency when it comes to designing solar cells for building-integrated photovoltaic applications such as solar windows, thus recently instigating a great interest in the development of neutral-colored semitransparent solar cells. Organic-inorganic halide perovskites (OIHPs) are of particular interest due to their unique properties as solar cell materials. Here, we demonstrate a laser patterning process of the OIHP film to control aperture ratios, which in turn can produce a neutral color for view. Through careful aperture control and by using indium tin oxide as the top electrode, we are able to fabricate neutral-colored semitransparent OIHP solar cells with high efficiency. Furthermore, we show that the involvement of a LiF interlayer at the OIHP and electron transporting layer interface is necessary, since the LiF interlayer plays a bifunctional role of interface passivation and current flow rectification, in order to more closely simulate an ideal diode. As a result, we successfully demonstrate a high efficiency of 12.83% for a 2.00 cm2area and 9.30% for a 36.00 cm2area, while achieving an average visible range transmittance of 21.74%.
Bibliographical noteFunding Information:
This study was supported by the National Research Foundation of Korea (NRF) under the Ministry of Science, ICT and Future Planning [Basic Science Research Program (grant no. 2021R1A5A6002853) and Nano-Material Technology Development Program (grant no. 2017M3A7B4041696)], the Ministry of Trade, Industry and Energy, Republic of Korea (New and Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) (grant no. 20183010013820), and the Technology Innovation Program (grant no. 20012770; High Permeability Thermoplastic Elastomer for Solar Module) funded by the Ministry of Trade, Industry and Energy (MOTIE, Korea).
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- aperture ratio
- laser pattern
- neutral color
- organic-inorganic halide perovskite
ASJC Scopus subject areas
- Chemical Engineering (miscellaneous)
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering
- Materials Chemistry