Issue 6, 2012
From the journal:

Nanoscale

Efficiency enhancement of graphene/silicon-pillar-array solar cells by HNO3 and PEDOT-PSS†

Tingting Feng,a   Dan Xie,*a   Yuxuan Lin,a   Haiming Zhao,a   Yu Chen,a   He Tian,a   Tianling Ren,*a   Xiao Li,b   Zhen Li,b   Kunlin Wang,b   Dehai Wub  and  Hongwei Zhu*bc  

* Corresponding authors

a Tsinghua National Laboratory for Information Science and Technology (TNList), Institute of Microelectronics, Tsinghua University, Beijing 100084, P. R. China
E-mail: xiedan@mail.tsinghua.edu.cn, rentl@tsinghua.edu.cn

b Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P. R. China
E-mail: hongweizhu@tsinghua.edu.cn

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

Abstract

A single-layer graphene film was grown on copper foil by chemical vapor deposition and transferred onto a silicon-pillar-array (SPA) substrate to make a Schottky junction solar cell. The SPA substrate was specifically designed to suppress reflectance and enhance light absorption. The energy conversion efficiency of the prepared graphene/SPA solar cells achieved a maximum of 2.90% with a junction area of 0.09 cm2. HNO3 was employed to dope the graphene in the solar cells, and the time dependence of HNO3 treatment on the cell performance was studied. Poly(3,4-ethylenedioxythiophene) polystyrenesulfonic acid (PEDOT-PSS) was also introduced in graphene/SPA solar cells by spin coating on top of the graphene film, and its modification on the cell performance was characterized. The results show that both HNO3 and the PEDOT-PSS film could enhance the energy conversion efficiency of graphene/SPA solar cells.

Graphical abstract: Efficiency enhancement of graphene/silicon-pillar-array solar cells by HNO3 and PEDOT-PSS

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Article information

DOI
https://doi.org/10.1039/C2NR12001A
Article type
Paper
Submitted
15 Dec 2011
Accepted
15 Jan 2012
First published
19 Jan 2012

Nanoscale, 2012,4, 2130-2133

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Efficiency enhancement of graphene/silicon-pillar-array solar cells by HNO3 and PEDOT-PSS

T. Feng, D. Xie, Y. Lin, H. Zhao, Y. Chen, H. Tian, T. Ren, X. Li, Z. Li, K. Wang, D. Wu and H. Zhu, Nanoscale, 2012, 4, 2130 DOI: 10.1039/C2NR12001A

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