Article Title

Fabrication of flexible reduced graphene oxide/Fe₂O₃ hollow nanospheres based on-chip micro-supercapacitors for integrated photodetecting applications

Authors

Shaosong Gu, Department of Material Science and Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
Zheng Lou, State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
Ludong Li, State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
Zhaojun Chen, College of Chemical Science and Engineering, Qingdao University, Qingdao 266071, China
Xiangdong Ma, Department of Material Science and Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China
Guozhen Shen, State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China

Keywords

Fe2O3, microsupercapacitor, photodetector, flexible

Abstract

ABSTRACT Micro-supercapacitors (MSCs) as important on-chip micropower sources have attracted considerable attention because of their unique and advantageous design for optimized maximum functionality within a minimized sized chip and excellent mechanical flexibility/stability in miniaturized portable electronic device applications. In this work, we report a novel, high-performance flexible integrated on-chip MSC based on hybrid nanostructures of reduced graphene oxide/Fe2O3 hollow nanospheres using a microelectronic photo-lithography technology combined with plasma etching technique. The unique structural design for on-chip MSCs enables high-performance enhancements compared with graphene-only devices, exhibiting high specific capacitances of 11.57 F·cm−3 at a scan rate of 200 mV·s−1 and excellent rate capability and robust cycling stability with capacitance retention of 92.08% after 32,000 charge/discharge cycles. Moreover, the on-chip MSCs exhibit superior flexibility and outstanding stability even after repetition of charge/discharge cycles under different bending states. As-fabricated highly flexible on-chip MSCs can be easily integrated with CdS nanowire-based photodetectors to form a highly compacted photodetecting system, exhibiting comparable performance to devices driven by conventional external energy storage units.

Graphical Abstract

DOI

https://doi.org/10.1007/s12274-015-0923-7

Publisher

Tsinghua University Press

Recommended Citation

Shaosong Gu,Zheng Lou,Ludong Li,Zhaojun Chen,Xiangdong Ma,Guozhen Shen, Fabrication of flexible reduced graphene oxide/Fe2O3 hollow nanospheres based on-chip micro-supercapacitors for integrated photodetecting applications. NanoRes.2016, 9(2): 424–434