硫化铋微米花的制备及其光响应性能

采用混合溶剂热合成法成功制备直径为4μm的Bi_2S_3微米花。研究不同反应时间和溶剂比对产物形貌的影响。另外,以玻璃为基底,利用Bi_2S_3微米花和ITO电极,通过简单滴涂的方法组装了一种光电导结构的可见光探测原型器件。光电性能测试表明,其在模拟太阳光下的光电流为暗电流的50倍,响应时间和衰减时间分别为227ms和880ms,具有优异的光电响应性;通过周期性的开关测试器件,光电流没有明显衰减,表明该器件具有良好的稳定性。

Synthesis and High Photoresponse Property of Bi2S3 Microflowers

Bi2S3 microflowers with diameter of 4μm composing of nanorods were successfully synthe-sized via a mixed solvent hydrothermal method,and the influences of different reaction time and sol-vent ratio on the morphology were also studied.Then the Bi2S3 microflowers were deposited on pat-terned ITO glass substrates by dip-coating to fabricate photodetectors.The photoresponse properties using Bi2S3 microflowers as a representative system show that the photocurrent under simulated sun-light is 50 times larger than that of the dark current,the response and decay time are estimated to be 227ms and 880ms,respectively,indicating the photodetector has excellent photoelectric responsive-ness;the light current is not obviously attenuated by the periodic opening and closing of the photode-tector,indicating that the photodetector has good stability.