Muthukrishnan Akshaiya Padmalatha, Lee Junyeoung, Kim Jongbok, Kim Chang Su, Jo Sungjin
School of Energy Engineering, Kyungpook National University Daegu 41566 Republic of Korea
Department of Materials Science and Engineering, Kumoh National Institute of Technology Gumi 39177 Republic of Korea.
RSC Adv. 2022 Feb 9;12(8):4883-4890. doi: 10.1039/d1ra08946c. eCollection 2022 Feb 3.
SnO has attracted significant attention as an electron transport layer (ETL) because of its wide optical bandgap, electron mobility, and transparency. However, the annealing temperature of 180 °C-200 °C, as reported by several studies, for the fabrication of SnO ETL limits its application for flexible devices. Herein, we demonstrated that the low-temperature deposition of SnO ETL and further surface modification with oxygen plasma enhances its efficiency from 2.3% to 15.30%. Oxygen plasma treatment improves the wettability of the low-temperature processed SnO ETL that results in a larger perovskite grain size. Hence, oxygen plasma treatment effectively improves the efficiency of perovskite solar cells at a low temperature and is compatible with flexible applications.
由于具有宽光学带隙、电子迁移率和透明度，SnO作为电子传输层（ETL）已引起了广泛关注。然而，多项研究报道，用于制造SnO ETL的退火温度在180°C至200°C之间，这限制了其在柔性器件中的应用。在此，我们证明了SnO ETL的低温沉积以及随后用氧等离子体进行表面改性可将其效率从2.3%提高到15.30%。氧等离子体处理改善了低温处理的SnO ETL的润湿性，从而导致更大的钙钛矿晶粒尺寸。因此，氧等离子体处理有效地提高了钙钛矿太阳能电池在低温下的效率，并且与柔性应用兼容。
