Work Function Engineering of Copper Sulfides for 2D Electronics
Achieving ideal metal/semiconductor junctions remains a critical challenge in advancing 2D electronics. While current approaches often rely on clean van der Waals contact interfaces to mitigate Fermi‐level pinning, they offer limited tunability in achieving precise energy level alignment with 2D sem...
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2025-08-01
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| Series: | Small Structures |
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| Online Access: | https://doi.org/10.1002/sstr.202500060 |
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| author | Hongju Park Jungmoon Lim Taehun Kim Junsung Byeon Jaesik Eom Seungsub Lee Jaeseok Kim Sangyeon Pak SeungNam Cha |
| author_facet | Hongju Park Jungmoon Lim Taehun Kim Junsung Byeon Jaesik Eom Seungsub Lee Jaeseok Kim Sangyeon Pak SeungNam Cha |
| author_sort | Hongju Park |
| collection | DOAJ |
| description | Achieving ideal metal/semiconductor junctions remains a critical challenge in advancing 2D electronics. While current approaches often rely on clean van der Waals contact interfaces to mitigate Fermi‐level pinning, they offer limited tunability in achieving precise energy level alignment with 2D semiconductors. In this work, a wide range of work function modulation in copper sulfide (Cu2−xS, 0 ≤ X < 1) electrode materials is proposed that can be achieved through an air‐ambient sulfurization process. Depending on the concentration of sulfur atoms, the Cu2−xS electrode showed considerable modulation in work function from 5.10 to 4.15 eV (ΔΦ = 950 meV). The continuous tunable work function of Cu2−xS electrodes enables the ideal junction interface with ohmic contact properties of both n‐type and p‐type transition metal dichalcogenides materials. Our efficient work function engineering strategy provides an innovative way to design 2D electronics for the development of integrated electronics devices. |
| format | Article |
| id | doaj-art-4da7bd1fb6a04ed3bf249f09b76f1461 |
| institution | Kabale University |
| issn | 2688-4062 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Small Structures |
| spelling | doaj-art-4da7bd1fb6a04ed3bf249f09b76f14612025-08-20T03:59:25ZengWiley-VCHSmall Structures2688-40622025-08-0168n/an/a10.1002/sstr.202500060Work Function Engineering of Copper Sulfides for 2D ElectronicsHongju Park0Jungmoon Lim1Taehun Kim2Junsung Byeon3Jaesik Eom4Seungsub Lee5Jaeseok Kim6Sangyeon Pak7SeungNam Cha8Department of Physics Sungkyunkwan University (SKKU) Suwon Gyeonggi‐do 16419 Republic of KoreaDepartment of Physics Sungkyunkwan University (SKKU) Suwon Gyeonggi‐do 16419 Republic of KoreaDepartment of Physics Sungkyunkwan University (SKKU) Suwon Gyeonggi‐do 16419 Republic of KoreaDepartment of Physics Sungkyunkwan University (SKKU) Suwon Gyeonggi‐do 16419 Republic of KoreaDepartment of Physics Sungkyunkwan University (SKKU) Suwon Gyeonggi‐do 16419 Republic of KoreaDepartment of Physics Sungkyunkwan University (SKKU) Suwon Gyeonggi‐do 16419 Republic of KoreaDepartment of Physics Sungkyunkwan University (SKKU) Suwon Gyeonggi‐do 16419 Republic of KoreaSchool of Electronic and Electrical Engineering Hongik University Seoul 04066 Republic of KoreaDepartment of Physics Sungkyunkwan University (SKKU) Suwon Gyeonggi‐do 16419 Republic of KoreaAchieving ideal metal/semiconductor junctions remains a critical challenge in advancing 2D electronics. While current approaches often rely on clean van der Waals contact interfaces to mitigate Fermi‐level pinning, they offer limited tunability in achieving precise energy level alignment with 2D semiconductors. In this work, a wide range of work function modulation in copper sulfide (Cu2−xS, 0 ≤ X < 1) electrode materials is proposed that can be achieved through an air‐ambient sulfurization process. Depending on the concentration of sulfur atoms, the Cu2−xS electrode showed considerable modulation in work function from 5.10 to 4.15 eV (ΔΦ = 950 meV). The continuous tunable work function of Cu2−xS electrodes enables the ideal junction interface with ohmic contact properties of both n‐type and p‐type transition metal dichalcogenides materials. Our efficient work function engineering strategy provides an innovative way to design 2D electronics for the development of integrated electronics devices.https://doi.org/10.1002/sstr.2025000602D transition metal dichalcogenidescontact engineeringcopper sulfidesulfurizationwork function modulation |
| spellingShingle | Hongju Park Jungmoon Lim Taehun Kim Junsung Byeon Jaesik Eom Seungsub Lee Jaeseok Kim Sangyeon Pak SeungNam Cha Work Function Engineering of Copper Sulfides for 2D Electronics Small Structures 2D transition metal dichalcogenides contact engineering copper sulfide sulfurization work function modulation |
| title | Work Function Engineering of Copper Sulfides for 2D Electronics |
| title_full | Work Function Engineering of Copper Sulfides for 2D Electronics |
| title_fullStr | Work Function Engineering of Copper Sulfides for 2D Electronics |
| title_full_unstemmed | Work Function Engineering of Copper Sulfides for 2D Electronics |
| title_short | Work Function Engineering of Copper Sulfides for 2D Electronics |
| title_sort | work function engineering of copper sulfides for 2d electronics |
| topic | 2D transition metal dichalcogenides contact engineering copper sulfide sulfurization work function modulation |
| url | https://doi.org/10.1002/sstr.202500060 |
| work_keys_str_mv | AT hongjupark workfunctionengineeringofcoppersulfidesfor2delectronics AT jungmoonlim workfunctionengineeringofcoppersulfidesfor2delectronics AT taehunkim workfunctionengineeringofcoppersulfidesfor2delectronics AT junsungbyeon workfunctionengineeringofcoppersulfidesfor2delectronics AT jaesikeom workfunctionengineeringofcoppersulfidesfor2delectronics AT seungsublee workfunctionengineeringofcoppersulfidesfor2delectronics AT jaeseokkim workfunctionengineeringofcoppersulfidesfor2delectronics AT sangyeonpak workfunctionengineeringofcoppersulfidesfor2delectronics AT seungnamcha workfunctionengineeringofcoppersulfidesfor2delectronics |