Intrinsic Electric Field Driven High Sensitive Photodetection in Alloy TMDC MoSSe
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2026
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866918367559942144 |
|---|---|
| author | Nayak, Chumki Masanta, Suvadip Moulick, Shubhadip Pramanik, Manotosh Kabiraj, Atanu Rath, Satchidananda Ghosh, Sukanya Pal, Atindra Nath Pal, Bipul Singha, Achintya |
| author_facet | Nayak, Chumki Masanta, Suvadip Moulick, Shubhadip Pramanik, Manotosh Kabiraj, Atanu Rath, Satchidananda Ghosh, Sukanya Pal, Atindra Nath Pal, Bipul Singha, Achintya |
| contents | Alloying offers an effective way to improve the functionality of transition metal dichalcogenides (TMDCs) in both fundamental research and optoelectronic applications, as it allows for engineering their electronic and optical properties. This study investigates the optoelectronic properties of CVD-synthesized alloy MoSSe, which exhibits an inherent out-of-plane dipole moment, arising from asymmetry in S and Se atoms on either side of the Mo layer, as confirmed by piezoelectric force microscopy, polarization-resolved second harmonic generation studies and theoretical first-principles calculations. Time-resolved photoluminescence measurements reveal an extended exciton radiative recombination lifetime in MoSSe, attributed to electron-hole wavefunction separation by the dipole moment, which improves photodetection by facilitating enhanced electron-hole separation before recombination. The device demonstrates significant responsivity over broad spectral range. By employing the photogating effect, the device response can be switched from slow to fast modes. These findings are further supported by illumination intensity-dependent photoluminescence and Raman measurements, underscoring the potential of polar TMDCs in future optoelectronic devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_02967 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Intrinsic Electric Field Driven High Sensitive Photodetection in Alloy TMDC MoSSe Nayak, Chumki Masanta, Suvadip Moulick, Shubhadip Pramanik, Manotosh Kabiraj, Atanu Rath, Satchidananda Ghosh, Sukanya Pal, Atindra Nath Pal, Bipul Singha, Achintya Materials Science Mesoscale and Nanoscale Physics Alloying offers an effective way to improve the functionality of transition metal dichalcogenides (TMDCs) in both fundamental research and optoelectronic applications, as it allows for engineering their electronic and optical properties. This study investigates the optoelectronic properties of CVD-synthesized alloy MoSSe, which exhibits an inherent out-of-plane dipole moment, arising from asymmetry in S and Se atoms on either side of the Mo layer, as confirmed by piezoelectric force microscopy, polarization-resolved second harmonic generation studies and theoretical first-principles calculations. Time-resolved photoluminescence measurements reveal an extended exciton radiative recombination lifetime in MoSSe, attributed to electron-hole wavefunction separation by the dipole moment, which improves photodetection by facilitating enhanced electron-hole separation before recombination. The device demonstrates significant responsivity over broad spectral range. By employing the photogating effect, the device response can be switched from slow to fast modes. These findings are further supported by illumination intensity-dependent photoluminescence and Raman measurements, underscoring the potential of polar TMDCs in future optoelectronic devices. |
| title | Intrinsic Electric Field Driven High Sensitive Photodetection in Alloy TMDC MoSSe |
| topic | Materials Science Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2603.02967 |