摘要
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。
A modified successive ionic layer adsorption and reaction (SILAR) method was developed to fabricate BiOI nanoflake arrays on flexible ITO/PET substrates at room temperature. The morphology, crystal structure and optical property of as-prepared samples were characterized by XRD, SEM and UV-VIS-NIR spectra. In order to improve the pho- toelectrochemical property of BiOI based solar cell, the BiOI/Bi2S3 and Bi2S3/BiOI heterojunction films were prepared under the same conditions. The photovoltaic cells were assembled using the prepared BiOI, BiOI/Bi2S3 and Bi2S3/BiOI heterojunction films as the working electrodes and sputtering Pt/ITO/PET as the counter electrodes. A redox (I^-/I^3- ) electrolyte composed of 0.05 M I2, 0.5 M LiI, 0.3 M DMPII, and 0.5 M 4-TBP in 3-methoxy acrylonitrile was injected into the cell when measuring the I-V characteristics and the IPCE properties. A short circuit current density (ISC) of 0. 597 mA/ cm^2 , an open circuit voltage (Voc) of 0. 376 V, a fill factor (FF) of 0. 293 and conversion efficiency (η) of 0. 136% were obtained under the optimized condition.
出处
《化工新型材料》
CAS
CSCD
北大核心
2015年第1期110-113,共4页
New Chemical Materials
基金
国家自然科学基金资助项目(61204009)
河南省国际科技合作计划项目(124300510055)
关键词
碘氧铋
SILAR
柔性基底
光电性能
杂化薄膜
BiOI, SILAR, flexible substrate, photovoltaic performance, heterojunction film