Enhanced Light Absorption by Facile Patterning of Nano-Grating on Mesoporous TiO<sub>2</sub> Photoelectrode for Cesium Lead Halide Perovskite Solar Cells
CsPbIBr<sub>2</sub>, a cesium-based all-inorganic halide perovskite (CsPe), is a very promising alternative material to mainstream organic–inorganic hybrid halide perovskite (HPe) materials owing to its exceptional moisture stability, thermal stability, and light stability. However, beca...
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MDPI AG
2021-05-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/5/1233 |
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| author | Kang-Pil Kim Wook Hyun Kim Soo Min Kwon Jun Yong Kim Yun Seon Do Sungho Woo |
| author_facet | Kang-Pil Kim Wook Hyun Kim Soo Min Kwon Jun Yong Kim Yun Seon Do Sungho Woo |
| author_sort | Kang-Pil Kim |
| collection | DOAJ |
| description | CsPbIBr<sub>2</sub>, a cesium-based all-inorganic halide perovskite (CsPe), is a very promising alternative material to mainstream organic–inorganic hybrid halide perovskite (HPe) materials owing to its exceptional moisture stability, thermal stability, and light stability. However, because of the wide band gap (2.05 eV) of CsPbIBr<sub>2</sub>, it has a low power conversion efficiency (<i>PCE</i>), which hinders its application in highly efficient solar cells. In this study, a facile nanoimprinted one-dimensional grating nanopattern (1D GNP) formation on mesoporous TiO<sub>2</sub> (mp-TiO<sub>2</sub>) photoelectrodes was introduced to improve the effective light utilization and enhance the performance of CsPbIBr<sub>2</sub> perovskite solar cells (PSCs). The 1D GNP structure on the mp-TiO<sub>2</sub> layer increases the light absorption efficiency by diffracting the unabsorbed light into the active mp-TiO<sub>2</sub> and CsPbIBr<sub>2</sub> layers as well as increasing the charge separation and collection due to the extended interfacial contact area between the mp-TiO<sub>2</sub> and CsPbIBr<sub>2</sub> layers. Consequently, both the current density (<i>J<sub>SC</sub></i>) and the fill factor (<i>FF</i>) of the fabricated cells improved, leading to over a 20% enhancement in the solar cell’s <i>PCE</i>. Thus, this periodic grating structure, fabricated by simple nanoimprinting, could play an important role in the large-scale production of highly efficient and cost-effective Cs-based PSCs. |
| first_indexed | 2024-03-10T11:38:35Z |
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| language | English |
| last_indexed | 2024-03-10T11:38:35Z |
| publishDate | 2021-05-01 |
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| series | Nanomaterials |
| spelling | doaj.art-6df7d31613f74ab1b482e40857657d272023-11-21T18:42:29ZengMDPI AGNanomaterials2079-49912021-05-01115123310.3390/nano11051233Enhanced Light Absorption by Facile Patterning of Nano-Grating on Mesoporous TiO<sub>2</sub> Photoelectrode for Cesium Lead Halide Perovskite Solar CellsKang-Pil Kim0Wook Hyun Kim1Soo Min Kwon2Jun Yong Kim3Yun Seon Do4Sungho Woo5Division of Energy Technology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, KoreaDivision of Energy Technology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, KoreaDivision of Energy Technology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, KoreaSchool of Electronic and Electrical Engineering, Kyungpook National University, Daegu 41566, KoreaSchool of Electronic and Electrical Engineering, Kyungpook National University, Daegu 41566, KoreaDivision of Energy Technology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, KoreaCsPbIBr<sub>2</sub>, a cesium-based all-inorganic halide perovskite (CsPe), is a very promising alternative material to mainstream organic–inorganic hybrid halide perovskite (HPe) materials owing to its exceptional moisture stability, thermal stability, and light stability. However, because of the wide band gap (2.05 eV) of CsPbIBr<sub>2</sub>, it has a low power conversion efficiency (<i>PCE</i>), which hinders its application in highly efficient solar cells. In this study, a facile nanoimprinted one-dimensional grating nanopattern (1D GNP) formation on mesoporous TiO<sub>2</sub> (mp-TiO<sub>2</sub>) photoelectrodes was introduced to improve the effective light utilization and enhance the performance of CsPbIBr<sub>2</sub> perovskite solar cells (PSCs). The 1D GNP structure on the mp-TiO<sub>2</sub> layer increases the light absorption efficiency by diffracting the unabsorbed light into the active mp-TiO<sub>2</sub> and CsPbIBr<sub>2</sub> layers as well as increasing the charge separation and collection due to the extended interfacial contact area between the mp-TiO<sub>2</sub> and CsPbIBr<sub>2</sub> layers. Consequently, both the current density (<i>J<sub>SC</sub></i>) and the fill factor (<i>FF</i>) of the fabricated cells improved, leading to over a 20% enhancement in the solar cell’s <i>PCE</i>. Thus, this periodic grating structure, fabricated by simple nanoimprinting, could play an important role in the large-scale production of highly efficient and cost-effective Cs-based PSCs.https://www.mdpi.com/2079-4991/11/5/1233CsPbIBr<sub>2</sub>perovskite solar cellmesoporous TiO<sub>2</sub>nanoimprintinggrating nanopatternincreased light absorption |
| spellingShingle | Kang-Pil Kim Wook Hyun Kim Soo Min Kwon Jun Yong Kim Yun Seon Do Sungho Woo Enhanced Light Absorption by Facile Patterning of Nano-Grating on Mesoporous TiO<sub>2</sub> Photoelectrode for Cesium Lead Halide Perovskite Solar Cells Nanomaterials CsPbIBr<sub>2</sub> perovskite solar cell mesoporous TiO<sub>2</sub> nanoimprinting grating nanopattern increased light absorption |
| title | Enhanced Light Absorption by Facile Patterning of Nano-Grating on Mesoporous TiO<sub>2</sub> Photoelectrode for Cesium Lead Halide Perovskite Solar Cells |
| title_full | Enhanced Light Absorption by Facile Patterning of Nano-Grating on Mesoporous TiO<sub>2</sub> Photoelectrode for Cesium Lead Halide Perovskite Solar Cells |
| title_fullStr | Enhanced Light Absorption by Facile Patterning of Nano-Grating on Mesoporous TiO<sub>2</sub> Photoelectrode for Cesium Lead Halide Perovskite Solar Cells |
| title_full_unstemmed | Enhanced Light Absorption by Facile Patterning of Nano-Grating on Mesoporous TiO<sub>2</sub> Photoelectrode for Cesium Lead Halide Perovskite Solar Cells |
| title_short | Enhanced Light Absorption by Facile Patterning of Nano-Grating on Mesoporous TiO<sub>2</sub> Photoelectrode for Cesium Lead Halide Perovskite Solar Cells |
| title_sort | enhanced light absorption by facile patterning of nano grating on mesoporous tio sub 2 sub photoelectrode for cesium lead halide perovskite solar cells |
| topic | CsPbIBr<sub>2</sub> perovskite solar cell mesoporous TiO<sub>2</sub> nanoimprinting grating nanopattern increased light absorption |
| url | https://www.mdpi.com/2079-4991/11/5/1233 |
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