Acta Phys. -Chim. Sin. ›› 2017, Vol. 33 ›› Issue (10): 2029-2034.doi: 10.3866/PKU.WHXB201705121

• ARTICLE • Previous Articles     Next Articles

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)

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

MSC2000: 

  • O649