Out-of-plane polarization induces a picosecond photoresponse in rhombohedral stacked bilayer WSe2
Constructing van der Waals materials with spontaneous out-of-plane polarization through interlayer engineering expands the family of two-dimensional ferroelectrics and provides an excellent platform for enhancing the photoelectric conversion efficiency. Here, we reveal the effect of spontaneous pola...
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| Format: | Article |
| Language: | English |
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Beilstein-Institut
2024-11-01
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| Series: | Beilstein Journal of Nanotechnology |
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| Online Access: | https://doi.org/10.3762/bjnano.15.109 |
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| author | Guixian Liu Yufan Wang Zhoujuan Xu Zhouxiaosong Zeng Lanyu Huang Cuihuan Ge Xiao Wang |
| author_facet | Guixian Liu Yufan Wang Zhoujuan Xu Zhouxiaosong Zeng Lanyu Huang Cuihuan Ge Xiao Wang |
| author_sort | Guixian Liu |
| collection | DOAJ |
| description | Constructing van der Waals materials with spontaneous out-of-plane polarization through interlayer engineering expands the family of two-dimensional ferroelectrics and provides an excellent platform for enhancing the photoelectric conversion efficiency. Here, we reveal the effect of spontaneous polarization on ultrafast carrier dynamics in rhombohedral stacked bilayer WSe2. Using precise stacking techniques, a 3R WSe2-based vertical heterojunction was successfully constructed and confirmed by polarization-resolved second harmonic generation measurements. Through output characteristics and the scanning photocurrent map under zero bias, we reveal a non-zero short-circuit current in the graphene/3R WSe2/graphene heterojunction region, demonstrating the bulk photovoltaic effect. Furthermore, the out-of-plane polarization enables the 3R WSe2 heterojunction region to achieve an ultrafast intrinsic photoresponse time of approximately 3 ps. The ultrafast response time remains consistent across varying detection powers, demonstrating environmental stability and highlighting the potential in optoelectronic applications. Our study presents an effective strategy for enhancing the response time of photodetectors. |
| format | Article |
| id | doaj-art-11c6b955abbe4acf977b0b189cd3d8dd |
| institution | Kabale University |
| issn | 2190-4286 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Beilstein-Institut |
| record_format | Article |
| series | Beilstein Journal of Nanotechnology |
| spelling | doaj-art-11c6b955abbe4acf977b0b189cd3d8dd2024-12-02T08:46:05ZengBeilstein-InstitutBeilstein Journal of Nanotechnology2190-42862024-11-011511362136810.3762/bjnano.15.1092190-4286-15-109Out-of-plane polarization induces a picosecond photoresponse in rhombohedral stacked bilayer WSe2Guixian Liu0Yufan Wang1Zhoujuan Xu2Zhouxiaosong Zeng3Lanyu Huang4Cuihuan Ge5Xiao Wang6Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, College of Materials Science and Engineering, School of Physics and Electronics, Hunan University, Changsha, 410082, China Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, College of Materials Science and Engineering, School of Physics and Electronics, Hunan University, Changsha, 410082, China Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, College of Materials Science and Engineering, School of Physics and Electronics, Hunan University, Changsha, 410082, China Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, College of Materials Science and Engineering, School of Physics and Electronics, Hunan University, Changsha, 410082, China Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, College of Materials Science and Engineering, School of Physics and Electronics, Hunan University, Changsha, 410082, China Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, College of Materials Science and Engineering, School of Physics and Electronics, Hunan University, Changsha, 410082, China Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, College of Materials Science and Engineering, School of Physics and Electronics, Hunan University, Changsha, 410082, China Constructing van der Waals materials with spontaneous out-of-plane polarization through interlayer engineering expands the family of two-dimensional ferroelectrics and provides an excellent platform for enhancing the photoelectric conversion efficiency. Here, we reveal the effect of spontaneous polarization on ultrafast carrier dynamics in rhombohedral stacked bilayer WSe2. Using precise stacking techniques, a 3R WSe2-based vertical heterojunction was successfully constructed and confirmed by polarization-resolved second harmonic generation measurements. Through output characteristics and the scanning photocurrent map under zero bias, we reveal a non-zero short-circuit current in the graphene/3R WSe2/graphene heterojunction region, demonstrating the bulk photovoltaic effect. Furthermore, the out-of-plane polarization enables the 3R WSe2 heterojunction region to achieve an ultrafast intrinsic photoresponse time of approximately 3 ps. The ultrafast response time remains consistent across varying detection powers, demonstrating environmental stability and highlighting the potential in optoelectronic applications. Our study presents an effective strategy for enhancing the response time of photodetectors.https://doi.org/10.3762/bjnano.15.109broken inversion symmetryout-of-plane polarizationpicosecond photoresponsetime-resolved photocurrent measurement (trpc)wse2 |
| spellingShingle | Guixian Liu Yufan Wang Zhoujuan Xu Zhouxiaosong Zeng Lanyu Huang Cuihuan Ge Xiao Wang Out-of-plane polarization induces a picosecond photoresponse in rhombohedral stacked bilayer WSe2 Beilstein Journal of Nanotechnology broken inversion symmetry out-of-plane polarization picosecond photoresponse time-resolved photocurrent measurement (trpc) wse2 |
| title | Out-of-plane polarization induces a picosecond photoresponse in rhombohedral stacked bilayer WSe2 |
| title_full | Out-of-plane polarization induces a picosecond photoresponse in rhombohedral stacked bilayer WSe2 |
| title_fullStr | Out-of-plane polarization induces a picosecond photoresponse in rhombohedral stacked bilayer WSe2 |
| title_full_unstemmed | Out-of-plane polarization induces a picosecond photoresponse in rhombohedral stacked bilayer WSe2 |
| title_short | Out-of-plane polarization induces a picosecond photoresponse in rhombohedral stacked bilayer WSe2 |
| title_sort | out of plane polarization induces a picosecond photoresponse in rhombohedral stacked bilayer wse2 |
| topic | broken inversion symmetry out-of-plane polarization picosecond photoresponse time-resolved photocurrent measurement (trpc) wse2 |
| url | https://doi.org/10.3762/bjnano.15.109 |
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