Title :
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
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;
Conference_Titel :
Power and Energy Engineering Conference (APPEEC), 2012 Asia-Pacific
Conference_Location :
Shanghai
Print_ISBN :
978-1-4577-0545-8
DOI :
10.1109/APPEEC.2012.6307199
