School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Eonyang-eup, Ulju-gun, Ulsan 44919, Korea.
School of Bioenvironmental Chemistry, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si 54896, Jeollabuk-do, Korea.
Int J Mol Sci. 2021 Nov 12;22(22):12235. doi: 10.3390/ijms222212235.
The energy conversion efficiency (ECE) (η), current density (), open-circuit voltage (), and fill factor () of perovskite solar cells were studied by using the transmittance of a nanopatterned mesoporous TiO (mp-TiO) thin-film layer. To improve the ECE of perovskite solar cells, a mp-TiO thin-film layer was prepared to be used as an electron transport layer (ETL) via the nanoimprinting method for nanopatterning, which was controlled by the aspect ratio. The nanopatterned mp-TiO thin-film layer had a uniform and well-designed structure, and the diameter of nanopatterning was 280 nm. The aspect ratio was controlled at the depths of 75, 97, 127, and 167 nm, and the perovskite solar cell was fabricated with different depths. The ECE of the perovskite solar cells with the nanopatterned mp-TiO thin-film layer was 14.50%, 15.30%, 15.83%, or 14.24%, which is higher than that of a non-nanopatterned mp-TiO thin-film layer (14.07%). The enhancement of ECE was attributed to the transmittance of the nanopatterned mp-TiO thin-film layer that is due to the improvement of the electron generation. As a result, better electron generation affected the electron density, and increased the , and of perovskite solar cells.
通过使用纳米图案介孔 TiO（mp-TiO）薄膜层的透光率，研究了钙钛矿太阳能电池的能量转换效率（ECE）（η）、电流密度（）、开路电压（）和填充因子（）。为了提高钙钛矿太阳能电池的 ECE，通过纳米压印法制备了 mp-TiO 薄膜层作为电子传输层（ETL），通过纵横比进行控制。纳米图案化的 mp-TiO 薄膜层具有均匀且设计良好的结构，纳米图案的直径为 280nm。纵横比分别控制在 75nm、97nm、127nm 和 167nm 的深度，并在不同深度制备了钙钛矿太阳能电池。具有纳米图案化 mp-TiO 薄膜层的钙钛矿太阳能电池的 ECE 为 14.50%、15.30%、15.83%或 14.24%，高于非纳米图案化 mp-TiO 薄膜层（14.07%）的 ECE。ECE 的提高归因于纳米图案化 mp-TiO 薄膜层的透光率，这是由于电子产生的提高。因此，更好的电子产生影响了电子密度，并增加了钙钛矿太阳能电池的、和。
