Benefits of the Hydrophobic Surface for CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Crystalline Growth towards Highly Efficient Inverted Perovskite Solar Cells
In inverted perovskite solar cells (PSCs), high-quality perovskite film grown on hole-transporting material (HTM) with pinhole-free coverage and a large grain size is crucial for high efficiency. Here, we report on the growth of pinhole-free and large grain CH<sub>3</sub>NH<sub>3&l...
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| Format: | Article |
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MDPI AG
2019-05-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/24/10/2027 |
| _version_ | 1818288586781360128 |
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| author | Yang Li Zheng Xu Suling Zhao Dandan Song Bo Qiao Youqin Zhu Juan Meng |
| author_facet | Yang Li Zheng Xu Suling Zhao Dandan Song Bo Qiao Youqin Zhu Juan Meng |
| author_sort | Yang Li |
| collection | DOAJ |
| description | In inverted perovskite solar cells (PSCs), high-quality perovskite film grown on hole-transporting material (HTM) with pinhole-free coverage and a large grain size is crucial for high efficiency. Here, we report on the growth of pinhole-free and large grain CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> crystals favored by a hydrophobic small molecular HTM, namely, 4,4′-Bis(4-(di-p-toyl)aminostyryl)biphenyl (TPASBP). The hydrophobic surface induced by TPASBP suppressed the density of the perovskite nuclei and heterogeneous nucleation, thus promoting the perovskite to grow into a dense and homogeneous film with a large grain size. The CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> deposited on the TPASBP exhibited better crystallization and a lower trap density than that on the hydrophilic surface of indium tin oxide (ITO), resulting in a significant reduction in carrier recombination. Combined with the efficient hole extraction ability of TPASBP, a high efficiency of 18.72% in the inverted PSCs fabricated on TPASBP was achieved. |
| first_indexed | 2024-12-13T01:58:45Z |
| format | Article |
| id | doaj.art-02d7ea4a486e4099b369e569042ca28c |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-12-13T01:58:45Z |
| publishDate | 2019-05-01 |
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| series | Molecules |
| spelling | doaj.art-02d7ea4a486e4099b369e569042ca28c2022-12-22T00:03:19ZengMDPI AGMolecules1420-30492019-05-012410202710.3390/molecules24102027molecules24102027Benefits of the Hydrophobic Surface for CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Crystalline Growth towards Highly Efficient Inverted Perovskite Solar CellsYang Li0Zheng Xu1Suling Zhao2Dandan Song3Bo Qiao4Youqin Zhu5Juan Meng6Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing 100044, ChinaKey Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing 100044, ChinaKey Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing 100044, ChinaKey Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing 100044, ChinaKey Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing 100044, ChinaKey Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing 100044, ChinaKey Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing 100044, ChinaIn inverted perovskite solar cells (PSCs), high-quality perovskite film grown on hole-transporting material (HTM) with pinhole-free coverage and a large grain size is crucial for high efficiency. Here, we report on the growth of pinhole-free and large grain CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> crystals favored by a hydrophobic small molecular HTM, namely, 4,4′-Bis(4-(di-p-toyl)aminostyryl)biphenyl (TPASBP). The hydrophobic surface induced by TPASBP suppressed the density of the perovskite nuclei and heterogeneous nucleation, thus promoting the perovskite to grow into a dense and homogeneous film with a large grain size. The CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> deposited on the TPASBP exhibited better crystallization and a lower trap density than that on the hydrophilic surface of indium tin oxide (ITO), resulting in a significant reduction in carrier recombination. Combined with the efficient hole extraction ability of TPASBP, a high efficiency of 18.72% in the inverted PSCs fabricated on TPASBP was achieved.https://www.mdpi.com/1420-3049/24/10/2027inverted perovskite solar cells (PSCs)hydrophobic surfacesmall moleculehole-transporting material (HTM)crystalline growth |
| spellingShingle | Yang Li Zheng Xu Suling Zhao Dandan Song Bo Qiao Youqin Zhu Juan Meng Benefits of the Hydrophobic Surface for CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Crystalline Growth towards Highly Efficient Inverted Perovskite Solar Cells Molecules inverted perovskite solar cells (PSCs) hydrophobic surface small molecule hole-transporting material (HTM) crystalline growth |
| title | Benefits of the Hydrophobic Surface for CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Crystalline Growth towards Highly Efficient Inverted Perovskite Solar Cells |
| title_full | Benefits of the Hydrophobic Surface for CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Crystalline Growth towards Highly Efficient Inverted Perovskite Solar Cells |
| title_fullStr | Benefits of the Hydrophobic Surface for CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Crystalline Growth towards Highly Efficient Inverted Perovskite Solar Cells |
| title_full_unstemmed | Benefits of the Hydrophobic Surface for CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Crystalline Growth towards Highly Efficient Inverted Perovskite Solar Cells |
| title_short | Benefits of the Hydrophobic Surface for CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Crystalline Growth towards Highly Efficient Inverted Perovskite Solar Cells |
| title_sort | benefits of the hydrophobic surface for ch sub 3 sub nh sub 3 sub pbi sub 3 sub crystalline growth towards highly efficient inverted perovskite solar cells |
| topic | inverted perovskite solar cells (PSCs) hydrophobic surface small molecule hole-transporting material (HTM) crystalline growth |
| url | https://www.mdpi.com/1420-3049/24/10/2027 |
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