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1.太原学院 材料与化学工程系,山西 太原 030032
2.哈尔滨工业大学 材料科学与工程学院,黑龙江 哈尔滨 150001
[ "朱建华(1981-),女,山西孝义人,硕士,讲师,2008年于西北工业大学获得硕士学位,主要从事光电材料制备与性能方面的研究。E-mail:qiqi20090704@163.com" ]
[ "高世勇(1980-),男,山西大同人,博士,副教授,硕士生导师,2010年于吉林大学获得博士学位,主要从事宽带隙半导体材料与器件方面的研究。E-mail:gaoshiyong@hit.edu.cn" ]
收稿日期:2022-04-21,
修回日期:2022-05-09,
纸质出版日期:2022-08-25
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朱建华,容萍,任帅等.ZnO纳米棒/Bi2S3量子点异质结的制备及光电探测性能研究[J].光学精密工程,2022,30(16):1915-1923.
ZHU Jianhua,RONG Ping,REN Shuai,et al.Preparation and photodetection performance of ZnO nanorods/Bi2S3 quantum dots heterojunction[J].Optics and Precision Engineering,2022,30(16):1915-1923.
朱建华,容萍,任帅等.ZnO纳米棒/Bi2S3量子点异质结的制备及光电探测性能研究[J].光学精密工程,2022,30(16):1915-1923. DOI: 10.37188/OPE.20223016.1915.
ZHU Jianhua,RONG Ping,REN Shuai,et al.Preparation and photodetection performance of ZnO nanorods/Bi2S3 quantum dots heterojunction[J].Optics and Precision Engineering,2022,30(16):1915-1923. DOI: 10.37188/OPE.20223016.1915.
为了获得具有多波段响应的ZnO基宽光谱光电探测器,将ZnO与其它窄带隙半导体耦合构建异质结,并基于此制备了光电探测器。本文采用水热法结合连续离子层吸附反应法在FTO衬底上成功制备了ZnO纳米棒/Bi
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量子点异质结材料。通过扫描电子显微镜和能谱仪表征了ZnO纳米棒/Bi
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量子点异质结的表面形貌和元素组成。结果表明,Bi
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量子点均匀且致密地附着在整个ZnO纳米棒上。此外,基于该ZnO纳米棒/Bi
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量子点异质结制备的探测器能够在无外加偏压条件下工作,即具有自供能特性。与ZnO纳米棒探测器相比,ZnO纳米棒/Bi
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量子点探测器在紫外光照射下的光电流增大了0.065 mA,这主要是因为两者形成的异质结能够有效抑制光生载流子的复合。此外,ZnO纳米棒/Bi
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量子点探测器对可见光也具有优异的探测能力,其对波长为470 nm的蓝光和530 nm的绿光的探测均表现出良好的循环稳定性。
In order to obtain a ZnO-based broadband photodetector with a multi-band response, ZnO is coupled with other narrow-bandgap semiconductors to construct the heterojunction. In this study, ZnO nanorods (NRs) arrays were first grown on FTO substrates through the hydrothermal process. Then, Bi
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quantum dots (QDs) were synthesized on the surface of ZnO NRs via the successive ionic layer absorption reaction method, thereby successfully constructing the ZnO NRs/Bi
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QDs heterojunction. The micro-morphology and elemental composition of as-prepared samples were characterized using a scanning electron microscope and energy dispersive spectrometer. The results show that the Bi
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QDs are uniformly and densely attached to the surface of ZnO NRs that are slightly curved and partially intertwined at the top. Then, a broadband photodetector was fabricated based on the as-prepared heterojunction. In addition, the photodetector based on the ZnO NRs/Bi
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QDs heterojunction can operate without an external power source, indicating that the photodetector has a self-powered feature. Compared with the ZnO NRs photodetector, the maximum photocurrent of the ZnO NRs/Bi
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QDs photodetector under UV light irradiation increases by approximately 0.065 mA. This is mainly because the type II band alignment between ZnO and Bi
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increases the separation efficiency of photogenerated charge carriers. Furthermore, the ZnO NRs/Bi
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QDs photodetector has excellent detection capability for visible light, exhibiting excellent cycle stability when irradiated by blue (470 nm) and green light (530 nm).
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