物理化学学报 >> 2017, Vol. 33 >> Issue (10): 2029-2034.doi: 10.3866/PKU.WHXB201705121

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4.81%光电转换效率的全固态致密PbS量子点薄膜敏化TiO2纳米棒阵列太阳电池

陈军军,史成武*(),张正国,肖冠南,邵章朋,李楠楠   

  • 收稿日期:2017-02-20 发布日期:2017-07-17
  • 通讯作者: 史成武 E-mail:shicw506@foxmail.com; shicw506@hfut.edu.cn
  • 基金资助:
    国家自然科学基金(51272061);国家自然科学基金(51472071)

4.81%-Efficiency Solid-State Quantum-Dot Sensitized Solar Cells Based on Compact PbS Quantum-Dot Thin Films and TiO2 Nanorod Arrays

Jun-Jun CHEN,Cheng-Wu SHI*(),Zheng-Guo ZHANG,Guan-Nan XIAO,Zhang-Peng SHAO,Nan-Nan LI   

  • Received:2017-02-20 Published:2017-07-17
  • Contact: Cheng-Wu SHI E-mail:shicw506@foxmail.com; shicw506@hfut.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(51272061);the National Natural Science Foundation of China(51472071)

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摘要：

利用TiO2纳米棒阵列和在旋涂辅助连续离子层吸附反应过程中使用乙二硫醇的策略，成功地在TiO2纳米棒阵列上获得了致密PbS量子点薄膜，组装了新颖结构的全固态致密PbS量子点薄膜敏化TiO2纳米棒阵列太阳电池。研究了TiO2纳米棒阵列长度对全固态致密PbS量子点薄膜敏化太阳电池光伏性能的影响，发现TiO2纳米棒阵列长度为290、540和1040 nm时，相应太阳电池的光电转换效率分别是2.02%、4.81%和1.95%。对于组装全固态量子点敏化太阳电池，综合考虑空穴传输长度和量子点担载量的平衡是获得较高光电转换效率的关键所在。

关键词: 致密PbS量子点薄膜, TiO2纳米棒阵列, 乙二硫醇, 连续离子层吸附反应, 全固态量子点敏化太阳电池

Abstract:

A compact PbS quantum-dot thin film was prepared using the combination of TiO2 nanorod arrays and 1, 2-ethanedithiol following the spin-coating assisted successive ionic layer absorption and reaction procedure. Solar cells with the novel structure of FTO/compact PbS quantum-dot thin film sensitized TiO2 nanorod arrays/spiro-OMeTAD/Au were assembled. Subsequently, the influence of the length of TiO2 nanorod arrays on the photovoltaic performance of all-solid-state compact PbS quantum-dot thin film sensitized solar cells was evaluated. The corresponding solar cells having TiO2 nanorod array lengths of 290, 540, and 1040 nm achieved photoelectric conversion efficiencies (PCE) of 2.02%, 4.81%, and 1.95%, respectively. These results reveal that in order to achieve high PCE values with the all-solid-state quantum dot sensitized solar cells, it is very important to balance the hole diffusion length with the loading amount of quantum-dots.

Key words: Compact PbS quantum-dot thin film, TiO2 nanorod array, 1, 2-Ethanedithiol, Successive ionic layer adsorption and reaction, Solid-state quantum-dot sensitized solar cell