Department of Chemistry, School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
Department of Mechanical Engineering, School of Engineering, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
Nano Lett. 2015 Oct 14;15(10):6665-71. doi: 10.1021/acs.nanolett.5b02490. Epub 2015 Sep 3.
In this work, we fabricated indium-free perovskite solar cells (SCs) using direct- and dry-transferred aerosol single-walled carbon nanotubes (SWNTs). We investigated diverse methodologies to solve SWNTs' hydrophobicity and doping issues in SC devices. These include changing wettability of poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (
PSS), MoO3 thermal doping, and HNO3(aq) doping with various dilutions from 15 to 70 v/v% to minimize its instability and toxic nature. We discovered that isopropanol (IPA) modified
PSS works better than surfactant modified
PSS as an electron-blocking layer on SWNTs in perovskite SCs due to superior wettability, whereas MoO3 is not compatible owing to energy level mismatching. Diluted HNO3 (35 v/v%)-doped SWNT-based device produced the highest PCE of 6.32% among SWNT-based perovskite SCs, which is 70% of an indium tin oxide (ITO)-based device (9.05%). Its flexible application showed a PCE of 5.38% on polyethylene terephthalate (PET) substrate.
在这项工作中，我们使用直接和干法转移气溶胶单壁碳纳米管（SWNTs）制造了无铟钙钛矿太阳能电池（SCs）。我们研究了多种方法来解决 SC 器件中 SWNTs 的疏水性和掺杂问题。这些方法包括改变聚（3,4-亚乙基二氧噻吩）/聚（苯乙烯磺酸盐）（PEDOT：PSS）的润湿性、MoO3 热掺杂以及用不同稀释度（从 15 到 70 v/v%）的 HNO3（aq）掺杂，以尽量减少其不稳定性和毒性。我们发现异丙醇（IPA）改性的 PEDOT：PSS 比表面活性剂改性的 PEDOT：PSS 更适合用作钙钛矿 SCs 中 SWNTs 的电子阻挡层，因为其润湿性更好，而 MoO3 则由于能级不匹配而不兼容。基于稀释的 HNO3（35 v/v%）掺杂的 SWNT 基器件在基于 SWNT 的钙钛矿 SC 中产生了最高的 6.32%的 PCE，这是基于铟锡氧化物（ITO）的器件（9.05%）的 70%。其在聚对苯二甲酸乙二醇酯（PET）基板上的柔性应用表现出 5.38%的 PCE。
