Ultrafast, self-powered and highly-stable PtS-Ga₂O₃ heterojunction photodetector for broad-spectrum sensing

IF 5.7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Surfaces and Interfaces Pub Date : 2025-02-27 DOI:10.1016/j.surfin.2025.106125

Damanpreet Kaur , Rohit Dahiya , Vinit Sheokand, Gaurav Bassi, Mukesh Kumar

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Abstract

Noble metal chalcogenides (nMC), special class of 2D non-layered materials, are gaining traction due to their exceptional qualities like high carrier mobility and higher active sites at surface. From optoelectronics perspective, their unsaturated dangling bonds lead to higher photoresponse but at expense of prolonged carrier lifetime, thereby making devices slower. Platinum monosulfide (PtS) is one such nMC possessing great potential but currently plagued with slower switching times and stability issues. Herein, we report an ultra-fast and self-powered broadband photodetector of PtS by interfacing with amorphous Ga₂O₃ leading to microsecond response. Heterojunction devices show speeds of 84µs/100µs at self-bias (biasing reduces it further) and are stable even after 7500 h as opposed to bare PtS device, which shows neither. Interfacial band alignment explains working of device, thereby, revealing synergistic combination of nMC with wide-bandgap material, broadening the horizon of nMC-based self-powered optoelectronics.

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来源期刊

Surfaces and Interfaces Chemistry-General Chemistry

CiteScore

8.50

自引率

6.50%

发文量

753

审稿时长

35 days

期刊介绍： The aim of the journal is to provide a respectful outlet for ''sound science'' papers in all research areas on surfaces and interfaces. We define sound science papers as papers that describe new and well-executed research, but that do not necessarily provide brand new insights or are merely a description of research results. Surfaces and Interfaces publishes research papers in all fields of surface science which may not always find the right home on first submission to our Elsevier sister journals (Applied Surface, Surface and Coatings Technology, Thin Solid Films)