【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。更多还原

【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.更多还原