物理化学学报2017，Vol.33Issue(10)：1934-1943,10.DOI:10.3866/PKU.WHXB201715185
利用扫描开尔文探针显微镜观察薄膜光电器件能级排布
Visualization of Energy Band Alignment in Thin-Film Optoelectronic Devices with Scanning Kelvin Probe Microscopy
摘要
Abstract
Understanding the energy band alignment across multiple layers in thin-film optoelectronic devices is extremely important because it governs elementary optoelectronic processes,such as charge carrier generation,separation,transport,recombination and collection.This monograph summarizes recent progress in visualization of energy band alignment in thin-film optoelectronic devices,such as organic solar cells (OSCs) and organic-inorganic perovskite photodetectors from our group by using scanning Kelvin probe microscopy (SKPM).Since active layers are enclosed by the top and bottom electrodes in vertically stacked devices,it is highly challenging to study the energy band alignment under operando conditions.Thus,cross-sectional SKPM has been developed to resolve this challenge.The results demonstrated that the interlayer was one of the most important factors for adjusting energy band alignment,determining device polarity and improving device performance.The characterization methods described in this monograph are poised to be widely applied to research in various thin-film optoelectronic devices,such as photovoltaic devices,photodetectors and light-emitting diodes (LEDs),especially those devices with tandem structures.关键词
扫描开尔文探针显微镜/能级排布/横截面/界面层/有机太阳能电池/有机-无机钙钛矿光探测器Key words
Scanning Kelvin probe microscopy/Energy band alignment/Cross-section/Interlayer/Organic solar cells/Organic-inorganic perovskite photodetectors分类
化学化工引用本文复制引用
刘继翀,唐峰,叶枫叶,陈琪,陈立桅..利用扫描开尔文探针显微镜观察薄膜光电器件能级排布[J].物理化学学报,2017,33(10):1934-1943,10.基金项目
The project was supported by the National Natural Science Foundation of China (21625304,51473184 and 11504408),Ministry of Science and Technology of China (2016YFA0200703),the CAS Research Equipment Development Program (YZ201654).国家自然科学基金(21625304,51473184,11504408),中国科学技术部重点研发计划(2016YFA0200703),中国科学院科研装备研制项目(YZ201654)资助 （21625304,51473184 and 11504408）
