Comparison of Photovoltaic Performance Enhancement in BiFeO3 by Using Graphene and Carbon Nanotubes as Transparent Electrode

Author

Wu, Xiao ; Xie, Dan ; Chen, Yu ; Feng, Tingting ; Tian, He ; Ren, Tianling ; Zang, Yongyuan ; Li, Xiao ; Li, Zhen ; Zhu, Hongwei

Author_Institution

Inst. of Microelectron., Tsinghua Univ., Beijing, China

fYear

2012

fDate

27-29 March 2012

Firstpage

1

Lastpage

4

Abstract

Enhanced photovoltaic performance of BiFeO₃ (BFO) material by utilizing graphene and carbon nanotubes (CNT) as transparent electrodes is compared for the first time. The short circuit current density and open circuit voltage are measured to be 34μA/cm², 2.4μA/cm², 0.27V and 0.31V by utilizing graphene and carbon nanotubes (CNT), respectively, much higher than the value reported in polycrystalline BFO. A theoretical model considering ferroelectric polarization, interface state, and energy band bending are constructed to investigate the carrier transportation behavior of the BFO solar cell. A Photochromic film is also proposed as an interesting application by using graphene/BFO/Pt solar cell as a photo detector.

Keywords

bismuth compounds; carbon nanotubes; electrochemical electrodes; graphene; iron compounds; multiferroics; photodetectors; solar cells; BiFeO₃; C; CNT; carbon nanotube; carrier transportation behavior; energy band bending; ferroelectric polarization; graphene; interface state; open circuit voltage; photo detector; photovoltaic performance enhancement; polycrystalline BFO solar cell; short circuit current density; transparency tunable polymer film; transparent electrode; Crystals; Electrodes; Films; Photovoltaic cells; Photovoltaic systems;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Engineering Conference (APPEEC), 2012 Asia-Pacific

Conference_Location

Shanghai

ISSN

2157-4839

Print_ISBN

978-1-4577-0545-8

Type

conf

DOI

10.1109/APPEEC.2012.6307199

Filename

6307199