Organic Ion Template-Guided Solution Growth of Ultrathin Bismuth Oxyselenide with Tunable Electronic Properties for Optoelectronic Applications

Le-Yang Dang; Mingqiang Liu; Gui-Gen WangDa-Qiang ZhaoJie-Cai HanJia-Qi ZhuZheng Liu

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Organic Ion Template-Guided Solution Growth of Ultrathin Bismuth Oxyselenide with Tunable Electronic Properties for Optoelectronic Applications

机译：Organic Ion Template-Guided Solution Growth of Ultrathin Bismuth Oxyselenide with Tunable Electronic Properties for Optoelectronic Applications

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2D Bi_2O_2Se has recently attracted widespread research interest due to itshigh electron mobility and good air stability with tunable bandgap. However,the direct and controllable growth of large-size, high-quality ultrathin Bi_2O_2Sewith tunable electronic properties remains a great challenge. Here, an organicion template-guided solution growth method, is developed using water as asolvent to efficiently obtain high-quality 2D Bi_2O_2Se. Significantly, the thicknessesand morphologies of 2D Bi2OxSe with various oxygen deficiencies;are also achieved. Optical spectroscopic results indicate that oxygen defectscan dramatically tune the electronic properties of Bi_2O_2Se, such as workfunction, band gap, and energy-band positions. As a result, the optimizedBi_2O_2Se devices exhibit a high photoresponsivity of 842.91 A W~(?1), photodetectivityof 8.18 × 10~（12） Jones under 532 nm laser, and electron mobilityof 334.7 cm~2 V~(?1) s~(?1). This work proposes a new green solution method tosynthesize large-sized, high-quality Bi_2O_2Se with tunable electronic structuresthat can be extended for various applications and provides a new possibilityof transfer-free large-scale device manufacturing.

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《Advanced functional materials》 |2022年第31期|2201020.1-2201020.12|共12页
作者
Le-Yang Dang; Mingqiang Liu; Gui-Gen WangDa-Qiang ZhaoJie-Cai HanJia-Qi ZhuZheng Liu;
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作者单位

Shenzhen Key Laboratory for Advanced MaterialsSchool of Materials Science and EngineeringHarbin Institute of Technology (Shenzhen)Shenzhen 518055, P. R. China;

Shenzhen Key Laboratory for Advanced MaterialsSchool of Materials Science and EngineeringHarbin Institute of Technology (Shenzhen)Shenzhen 518055, P. R. China;

National Key Laboratory of Science and Technology onAdvanced Composites in Special EnvironmentsH;

National Key Laboratory of Science and Technology onAdvanced Composites in Special EnvironmentsHarbin Institute of TechnologyHarbin 150080, P. R. ChinaSchool of Materials Science and EngineeringNanyang Technological University (NTU)Singapore 639798, Singapore;

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Bi_2O_2Se; field-effect transistors; OTG solution growth method; photodetectors; tunable electronic properties;

Organic Ion Template-Guided Solution Growth of Ultrathin Bismuth Oxyselenide with Tunable Electronic Properties for Optoelectronic Applications

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