Photocurrent enhancement of hybrid perovskite CsGeBr3 assisted two-dimensional WS2 nano-flakes based on electron-hole mobility improvement
Source abstract
Abstract
Abstract The high-performance photocurrent generations of tungsten disulfide Nano-flakes (WS2 NFs) are studied for optoelectronic applications and transistor structures. Moreover, a lead-free inorganic perovskite is formed by replacing of Lead component with germanium at CsPbX3 (X = Cl, Br, I) to achieve an excellent performance of the WS2 based photodetector. The results display that role of the perovskite on the CsGeBr3/WS2 hetero-structure is excellent to enhance photocurrent of the hetero-structure. The external quantum efficiency of the CsGeBr3/WS2 hetero-structure is obtained to be ~151%, and a detectivity is about 4.72 × 108 Jones. Indeed, the external quantum efficiency and detectivity enhance about two times after drop casting of the CsGeBr3 on the WS2 NFs device under green illumination. This finding results from highly efficient photo-excited carrier separation in the interface of the WS2 and CsGeBr3. Drain-source photocurrent in terms of electrical field displays two regimes related to direct and indirect excitons. Indeed, the possibility of exciton indirect formation enhances with increasing of the electrical field due to transfer momentum to electron.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Perovskite Materials and Applications · 2D Materials and Applications · Chalcogenide Semiconductor Thin Films
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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