高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (10): 2401.doi: 10.7503/cjcu20130093

• 物理化学 • 上一篇    下一篇

Sb2S3纳米丝的合成及杂化太阳电池研究

张慧, 吴璠, 韩昌报, 沈薇, 崔奇, 邱泽亮, 刘长文, 高锋, 王命泰   

  1. 中国科学院等离子体物理研究所, 中国科学院新型薄膜太阳电池重点实验室, 合肥 230031
  • 收稿日期:2013-01-25 出版日期:2013-10-10 发布日期:2013-10-10
  • 作者简介:王命泰,男,博士,研究员,主要从事太阳电池材料与器件性能研究.E-mail:mtwang@ipp.ac.cn
  • 基金资助:

    中国科学院合肥物质科学研究院院长基金和国家自然科学基金(批准号:11274307)资助.

Synthesis of Sb2S3 Nanowires and Their Application in Hybrid Solar Cells

ZHANG Hui, WU Fan, HAN Chang-Bao, SHEN Wei, CUI Qi, QIU Ze-Liang, LIU Chang-Wen, GAO Feng, WANG Ming-Tai   

  1. Institute of Plasma Physics, Chinese Academy of Sciences, Key Lab of Novel Thin Film Solar Cells, Chinese Academy of Sciences, Hefei 230031, China
  • Received:2013-01-25 Online:2013-10-10 Published:2013-10-10

摘要:

利用溶剂热方法制备出高质量的Sb2S3纳米丝, 并将其与聚(2-甲氧基-5-(2-乙基己氧基)-1,4-对苯乙炔)(MEH-PPV)共混制备成体型结构聚合物太阳电池.利用X射线衍射、扫描电子显微镜、透射电子显微镜和紫外-可见吸收光谱对Sb2S3纳米丝进行表征, 利用电流-电压(J-V)测试和电池的光电转换效率(IPCE)谱研究了Sb2S3纳米丝含量对Sb2S3/MEH-PPV共混体型结构太阳电池性能的影响.结果表明, 合成的Sb2S3纳米丝直径为60~70 nm, 长度为4~6 μm, 沿[001] 晶向生长, 在紫外-可见光区有较强的吸收, 光学带隙为1.57 eV.电池性能测试结果表明, Sb2S3纳米丝作为辅助光吸收材料及有效的电子传输材料, 提高了对可见光的利用率; Sb2S3的补充吸收作用使Sb2S3/MEH-PPV共混电池具有一定的宽谱响应特点; 与不含Sb2S3的电池相比, Sb2S3/MEH-PPV共混电池中增加的MEH-PPV/Sb2S3界面提高了光生激子分离效率, 从而提高了电池的效率.

关键词: Sb2S3, 纳米丝, 太阳电池

Abstract:

High quality Sb2S3 nanowires, which were 60—70 nm in diameter and 4—6 μm in length, were synthesized via a facile solvothermal approach by using L-cysteine(C3H7NO2S) as a capping agent, and applied to hybrid solar cells after blending with poly(2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene)(MEH-PPV). The as-synthesized nanowires were characterized by XRD, SEM, TEM, UV-Vis absorption and PL spectra; the solar cells were investigated by current-voltage(J-V) measurements and incident photon-to-current conversion efficiency(IPCE) spectroscopy. The highly pure Sb2S3 nanowires have a bandgap of 1.57 eV and grow along [001] direction. In comparison with the solar cells without Sb2S3 nanowires, the MEH-PPV/Sb2S3 devices exhibit a much higher Jsc depending on the Sb2S3 concentration and a certain wide spectral response characteristics due to complementary absorption of Sb2S3 nanowires. With addition of the Sb2S3 nanowires into the polymer phase, the MEH-PPV/Sb2S3 interfaces are created for dissociation of the excitons generated in the polymer and the direct channels are formed for electron transport; on the other hand, the defects on the nanowire surface cause the serious charge recombination that is unfavorable for the photocurrent generation. At the Sb2S3/MEH-PPV mass ratio of 5:1, the device with a power conversion efficiency of 0.393% is achieved under AM 1.5 illumination(100 mW/cm2).

Key words: Sb2S3, Nanowires, Solar cell

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