太阳能光伏材料Cu1-xLixInSe2的合成和物理特性

doi:10.15541/jim20160210

无机材料学报 ›› 2017, Vol. 32 ›› Issue (1): 101-106.DOI: 10.15541/jim20160210

太阳能光伏材料Cu_1-_xLi_xInSe₂的合成和物理特性

黄荣铁^{1, 2}, 郑明², 隋丽芳^{1, 2}, 蔡传兵¹, 黄富强^{2, 3}

(1. 上海大学理学院, 物理系, 上海200444; 2. 中国科学院上海硅酸盐研究所, 中国科学院能量转换材料重点实验室, 上海200050; 3. 北京大学化学与分子工程学院, 北京分子科学国家实验室, 稀土材料化学及应用国家重点实验室, 北京100871)

收稿日期:2016-03-31 出版日期:2017-01-20 网络出版日期:2016-12-15
作者简介:黄荣铁. E-mail: huangrongtie@student.sic.ac.cn

Synthesis and Physical Properties of Solar Material Cu_1-_xLi_xInSe₂

HUANG Rong-Tie^{1, 2}, ZHENG Ming², SUI Li-Fang^{1, 2}, CAI Chuan-Bing¹, HUANG Fu-Qiang^{2, 3}

(1. Department of Physics, Shanghai University, Shanghai 200444, China; 2. CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; 3. Beijing National Laboratory for Molecular Sciences and State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China)

Received:2016-03-31 Published:2017-01-20 Online:2016-12-15
About author:HUANG Rong-Tie (1988– ), male, candidate of master degree. E-mail: huangrongtie@student.sic.ac.cn
Supported by:
Foundation item: National Natural Science Foundation of China (61376056, 51402341);Science and Technology Commission of Shanghai (13JC1405700, 14520722000);Key Research Program of Chinese Academy of Sciences (KGZD-EW-T06)

摘要/Abstract

摘要：

将原料封装入真空石英管, 在873 K进行固相反应制备了Li掺杂的Cu_1-_xLi_xInSe₂(x = 0-0.4) 块体材料, 并对该材料的结构、电学和光学特性进行了系统性的研究。Li掺杂之后, 样品的晶体结构还保持黄铜矿结构, 并能得到更大的晶粒。而电阻率从1.98×10² Ω·cm增大到 2.73×10⁸ Ω·cm。光学能隙也从0.90 eV 提高到1.33 eV, 增大了光伏开路电压。实验结果表明, Li掺杂的Cu_1-_xLi_xInSe₂能有效提高光电材料的性能。

关键词: 黄铜矿结构, 太阳能电池, 块体材料, 物理特性, CuInSe2

Abstract:

Bulk materials of Li-doped Cu_1-_xLi_xInSe₂ (x = 0-0.4) were prepared by solid state reaction in evacuated and sealed quartz tubes at 873 K. To understand the physical properties of the materials, the structural, electrical and optical properties were systematically investigated. After doping with lithium, the samples crystallize in chalcopyrite structure with large grain sizes. Electrical resistivity and optical band gap of Li-doped Cu_1-_xLi_xInSe₂ are greatly enhanced to 2.73×10⁸ Ω·cm and 1.33 eV from original values of 1.98×10² Ω·cm and 0.9 eV, respectively. The large band gap improves the open circuit voltage, indicating that the Li-doping CuInSe₂ could be a promising material to future photovoltaic applications.

Key words: chalcopyrite structure, solar cell, bulk material, physical properties, CuInSe2

中图分类号:

TQ174

黄荣铁, 郑明, 隋丽芳, 蔡传兵, 黄富强. 太阳能光伏材料Cu_1-_xLi_xInSe₂的合成和物理特性[J]. 无机材料学报, 2017, 32(1): 101-106.

HUANG Rong-Tie, ZHENG Ming, SUI Li-Fang, CAI Chuan-Bing, HUANG Fu-Qiang. Synthesis and Physical Properties of Solar Material Cu_1-_xLi_xInSe₂[J]. Journal of Inorganic Materials, 2017, 32(1): 101-106.

图/表 5

Fig. 1 (a) XRD patterns of Cu1-xLixInSe2 (x = 0-0.4) sample (The inset showing details of the XRD patterns around 70° and 72°) and (b) variation of the lattice parameters a and c

Fig. 2 Typical Raman spectra of Cu1-xLixInSe2 (x = 0-0.4) samplesThe inset shows details of the Raman spectra from 150 to 200 cm-1

Fig. 3 SEM images of fractured surfaces of Cu1-xLixInSe2 (x = 0-0.4) samples(a) x = 0; (b) x = 0.2; (c) x = 0.4. Bar=10 μm

Fig. 4 Typical Nyquist plots of the electrochemical impedance spectra of Cu1-xLixInSe2 (x = 0-0.4) samplesThe inset shows the electrical resistivity with different doping contents at room temperature

Fig. 5 Diffuse reflectance spectra of Cu1-xLixInSe2 (x=0-0.4) samples (a) and the plots of (αhν)2 vs photon energy for Cu1-xLixInSe2 (x=0-0.4) samples (b)The inset shows the band gaps with different doping contents

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太阳能光伏材料Cu_1-_xLi_xInSe₂的合成和物理特性

Synthesis and Physical Properties of Solar Material Cu_1-_xLi_xInSe₂

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