We report for the first time high-performance solar-blind self-powered photodetectors (PDs) based on magnetron-sputtered CuCrO2/ <tex-math notation="LaTeX">β </tex-math> -Ga2O3 p-n heterojunction. Our CuCrO2/ <tex-math notation="LaTeX">β </tex-math> -Ga2O3 PDs show a low dark current of 6.5 pA, a high responsivity of 50 mA/W, a high detectivity of <tex-math notation="LaTeX">3.7× 10^12 </tex-math> Jones, and a high external quantum efficiency (EQE) of 24.6%, which outperform most reported <tex-math notation="LaTeX">β </tex-math> -Ga2O3-based heterojunction PDs. Such brilliant performances can be attributed to the high-quality CuCrO2 films enabled by in situ magnetron sputtering, which improve the photogenerated carrier mobility and collection efficiency. Furthermore, type-II band alignment between CuCrO2 and <tex-math notation="LaTeX">β </tex-math> -Ga2O3 heterojunction is identified by X-ray photoelectron spectroscopy with the valence band offset of 2.61 eV and the conduction band offset of 0.87 eV, which facilitates the separation of photogenerated electrons and holes. These results show that the CuCrO2/ <tex-math notation="LaTeX">β </tex-math> -Ga2O3 heterojunction could achieve superior solar-blind sensitivity, thus indicating strong prospects in wide practical applications regarding solar-blind detection.
No takes yet. Share an insight, caveat, or question.
Lin et al. (2024) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: