Opto-electronic properties of a TiO2/PS/mc-Si heterojunction based solar cell

被引：6
作者：
Janene, N. [1 ]
Ghrairi, N. [1 ]
Allagui, A. [2 ,3 ]
Alawadhi, H. [2 ]
El Khakani, M. A. [4 ]
Bessais, B. [1 ]
Gaidi, M. [2 ]
机构：
[1] Ctr Rech & Technol Energie, Lab Photovolta, Technopole Borj Cedria,BP 95, Hammam Lif 2050, Tunisia
[2] Univ Sharjah, Ctr Adv Mat Res, POB 27272, Sharjah, U Arab Emirates
[3] Univ Sharjah, Dept Sustainable & Renewable Energy Engn, POB 27272, Sharjah, U Arab Emirates
[4] INRS Energie Mat & Telecommun, Inst Natl Rech Sci, 1650 Blvd Lionel Boulet, Varennes, PQ J3X 1S2, Canada
来源：
APPLIED SURFACE SCIENCE | 2016年 / 368卷
关键词：
me-Si solar cell; Porous silicon; TiO2; Heterojunction; PLD; SILICON NANOWIRE; ENHANCEMENT; SI; EFFICIENCY; CONVERSION; FILMS; POWER;
D O I：
10.1016/j.apsusc.2016.01.231
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this work, we show the results of our investigation on the photoelectric properties of heterojunction solar cells based on Au/PS/mc-Si/Aland Au/TiO2/PS/mc-Si/Alstructures. Porous silicon (PS) were prepared by an electrochemical etching process with different values of current density. The surface porosity was found to increase with the increase of current density. Pulsed laser deposition was used to deposit 80 nm TiO2 thin films. Surface morphology and structural properties of TiO2/PS were characterized by using scanning electron microscopy (SEM) and atomic force microscopy (AFM). An enhancement of the electrical properties of the TiO2/PS/mc-Si heterojunction was observed after coating with TiO2. As a consequence, the solar cell efficiencies increased from 1.4% for the uncoated PS/mc-Si structure to 5% for the TiO2 coated one. Impedance spectroscopy confirmed the passivation effect of TiO2 through the improvement of the elaborated cells' electron lifetime and the formation of a TiO2/PS/Au heterojunction with the appearance of a second semi-circle in the Nyquist plot. (C) 2016 Elsevier B.V. All rights reserved.
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收藏
页码：140 / 145
页数：6
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