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室温下,采用SILAR法在柔性ITO基底上合成BiOI纳米片阵列薄膜。为提高其光电化学性能,设计并制备了BiOI/Bi2S3、Bi2S3/BiOI杂化异质结薄膜。通过XRD、SEM及UV-VIS-NIR等对所得产物的形貌、晶体结构和光学性能进行研究。以纯BiOI,BiOI/Bi2S3和Bi2S3/BiOI作为工作电极,Pt/ITO/PET作为对电极,I-/I3-作为电解液,组装成柔性太阳能电池器件。通过太阳光模拟器测试其光电转化性能,得到性能较优的是Bi2S3/BiOI杂化薄膜所组装的柔性电池器件,其光电转化效率(η)为0.136%,短路电流(Isc)为0.597mA/cm2,开路电压(Voc)为0.376V,填充因子(FF)为0.293。
At room temperature, a BiOI nanosheet array thin film was synthesized on a flexible ITO substrate by SILAR method. In order to improve their photoelectrochemical properties, BiOI / Bi2S3, Bi2S3 / BiOI hybrid heterojunction thin films were designed and prepared. The morphology, crystal structure and optical properties of the obtained product were investigated by XRD, SEM and UV-VIS-NIR. With pure BiOI, BiOI / Bi2S3 and Bi2S3 / BiOI as the working electrode, Pt / ITO / PET as the counter electrode, I- / I3- as the electrolyte, assembled into a flexible solar cell device. The photoelectric conversion performance of solar cells was tested by solar simulator to get the best performance. The photoelectric conversion efficiency (η) was 0.136% and the short-circuit current (Isc) was 0.597mA / cm2, the open circuit voltage (Voc) was 0.376V, and the fill factor (FF) was 0.293.