Publication: Interfacial Dipole Layer Enables High-Performance Heterojunctions for Photoelectrochemical Water Splitting
Interfacial Dipole Layer Enables High-Performance Heterojunctions for Photoelectrochemical Water Splitting
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Yun, J., Tan, J., Jung, Y.-K., Yang, W., Lee, H., Ma, S., Park, Y. S., Lee, C. U., Niu, W., Lee, J., Kim, K., Tilley, S. D., Walsh, A., & Moon, J. (2022). Interfacial Dipole Layer Enables High-Performance Heterojunctions for Photoelectrochemical Water Splitting. ACS Energy Letters, 7, 1392–1402. https://doi.org/10.1021/acsenergylett.2c00392
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TiO2 has been widely used as an n-type overlayer, simultaneously serving as a protective layer for photocathodes. However, the photovoltage generated from a TiO2 junction with p-type absorbers, such as p-Si, Sb2Se3, SnS, and Cu2O, is insufficient. We report a dipole reorientation strategy to overcome this limitation by inserting a polyethylenimine ethoxylated (PEIE) layer between a p-type absorber and TiO2. Furthermore, we demonstrate that the PEIE dipole orientation can be rearranged by increasing the layer thickness, leading to an u
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- Yun, Juwon
- Tan, Jeiwan
- Jung, Young-Kwang
- Yang, Wooseok
- Lee, Hyungsoo
- Ma, Sunihl
- Park, Young Sun
- Lee, Chan Uk
- Niu, Wenzhe
- Lee, Jeongyoub
- Kim, Kyungmin
- Walsh, Aron
- Moon, Jooho
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Yun, J., Tan, J., Jung, Y.-K., Yang, W., Lee, H., Ma, S., Park, Y. S., Lee, C. U., Niu, W., Lee, J., Kim, K., Tilley, S. D., Walsh, A., & Moon, J. (2022). Interfacial Dipole Layer Enables High-Performance Heterojunctions for Photoelectrochemical Water Splitting. ACS Energy Letters, 7, 1392–1402. https://doi.org/10.1021/acsenergylett.2c00392