Issue 9, 2012
From the journal:

Nanoscale

Electrical and thermal properties of a carbon nanotube/polycrystalline BiFeO3/Pt photovoltaic heterojunction with CdSe quantum dots sensitization

Yongyuan Zang,*a   Dan Xie,*b   Yu Chen,b   Xiao Wu,b   Tianling Ren,b   Jinquan Wei,c   Hongwei Zhu*cd  and  David Planta  

* Corresponding authors

a Electrical and Computer Engineering, McGill University, Montreal, Quebec, Canada
E-mail: zangyythu@gmail.com

b Institute of Microelectronics, Tsinghua University, Beijing, P.R. China
E-mail: xiedan@tsinghua.edu.cn

c Key Laboratory for Advanced Manufacturing by Material Processing Technology and Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China
E-mail: hongweizhu@tsinghua.edu.cn

d Center for Nano and Micro Mechanics (CNMM), Tsinghua University, Beijing 100084, P.R. China

Abstract

Electrical and thermal properties of a carbon nanotube (CNT)/multiferroic BiFeO3 (BFO)/Pt photovoltaic heterojunction are investigated for the first time. Enhanced photovoltaic properties (Jsc ≈ 2.1 μA cm−2 and Voc ≈ 0.47 V), as compared to the traditional polycrystalline BFO with indium tin oxide (ITO) as the top electrode, are observed due to the unique properties of CNT. An equivalent electrical and thermal model is constructed based on the energy band diagram of the CNT/BFO/Pt heterojunction for the first time and the carriers' transportation behavior is depicted theoretically. The influence of CdSe quantum dots (QDs) sensitization on the photovoltaic properties is presented, and a clear improvement of ∼4 fold in photocurrent density is observed.

Graphical abstract: Electrical and thermal properties of a carbon nanotube/polycrystalline BiFeO3/Pt photovoltaic heterojunction with CdSe quantum dots sensitization

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Supplementary files

Article information

DOI
https://doi.org/10.1039/C2NR30084B
Article type
Paper
Submitted
10 Jan 2012
Accepted
26 Feb 2012
First published
02 Mar 2012

Nanoscale, 2012,4, 2926-2930

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Electrical and thermal properties of a carbon nanotube/polycrystalline BiFeO3/Pt photovoltaic heterojunction with CdSe quantum dots sensitization

Y. Zang, D. Xie, Y. Chen, X. Wu, T. Ren, J. Wei, H. Zhu and D. Plant, Nanoscale, 2012, 4, 2926 DOI: 10.1039/C2NR30084B

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