摘要
通过热聚法制备了g-C_(3)N_(4)和Bi_(2)S_(3)纳米材料,在室温下进一步利用溶液法得到了g-C_(3)N_(4)/Bi_(2)S_(3)复合结构。采用扫描电子显微镜和X射线衍射仪对样品的表面形貌和晶体结构进行了表征,结果表明复合Bi_(2)S_(3)后并没有破坏g-C_(3)N_(4)本身的片层结构,且g-C_(3)N_(4)/Bi_(2)S_(3)复合结构仍然具有较好的结晶质量。基于g-C_(3)N_(4)/Bi_(2)S_(3)复合结构制备了紫外可见光探测器,并对其性能进行了研究。光电探测结果表明g-C_(3)N_(4)/Bi_(2)S_(3)复合结构探测器对紫外光的探测性能显著提高,其最大光电流约为g-C_(3)N_(4)纳米片探测器的12倍。此外,g-C_(3)N_(4)/Bi_(2)S_(3)复合结构探测器在可见光区也表现出了较好的光响应特性和稳定性,具有宽光谱响应特性。
Broad-band Photodetectors(PDs)become a foucus of current research due to extensive use in missiles guidance,flame monitoring,chemical analysis,biomedical imaging,optical communication and so on.The PDs based on semiconductors,in particular,attach much attention in trerms of their fast response speed,high sensitivity,small volume and weight.Thereinto,the g-C_(3)N_(4) nanomaterial is proven to possess many benefits for application to PDs such as the unique electronic structure,excellent thermal and chemical properties,non-toxic and raw material sufficient.For further broading the optical detection range and improving the detection performance of the g-C_(3)N_(4)PD,coupling g-C_(3)N_(4) and Bi_(2)S_(3)nanomaterial with a narrow bandgap of 1.3 eV is probably an effective strategy.However,there are few reports on the research of g-C_(3)N_(4)/Bi_(2)S_(3) composite for PDs.In this study,g-C_(3)N_(4)and Bi_(2)S_(3) nanomaterials have been prepared using thermal polymerization method and g-C_(3)N_(4)/Bi_(2)S_(3) composite structure has been further synthesized with the solution method.The surface morphology of the samples have been characterized through scanning electron microscope.And the results suggest that Bi_(2)S_(3) particales are attached to g-C_(3)N_(4) nanosheets,and the layered structure of g-C_(3)N_(4) is not broken after composited with Bi_(2)S_(3).The X-ray diffractometer has been used to analyze the crystalline structure of the as-synthesized g-C_(3)N_(4)/Bi_(2)S_(3)composite.It can be clearly seen that the g-C_(3)N_(4)/Bi_(2)S_(3)composite has great crystal quality.In addition,the PD based on g-C_(3)N_(4)/Bi_(2)S_(3)composite structure has been preapred.Under ultraviolet(UV)light illumination,it is indicated that the detection performance of the g-C_(3)N_(4)/Bi_(2)S_(3)PD for UV light is significantly improved,and its maximum photocurrent is as high as 12.93μA,which is about 12 times than that of g-C_(3)N_(4)PD.Meanwhile,the g-C_(3)N_(4)/Bi_(2)S_(3)PD also exhibits excellent stability and reproductivity,as
作者
方向明
容萍
任帅
王兆阳
高世勇
王金忠
FANG Xiangming;RONG Ping;REN Shuai;WANG Zhaoyang;GAO Shiyong;WANG Jinzhong(Department of Materials and Chemical Engineering,Taiyuan University,Taiyuan 030032,China;School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China)
出处
《光子学报》
EI
CAS
CSCD
北大核心
2022年第2期156-162,共7页
Acta Photonica Sinica
基金
国家重点研发计划(No.2019YFA0705201)
黑龙江省自然科学基金(No.LH2020E033)。
