[19a-432-1~12] 12.5 Organic solar cells

▼ [19a-432-8] High-Efficiency Perovskite Solar Cells Prepared by Low-Temperature Solution-Process

〇(M1)Lin YenTung¹, Shih-Hsuan Chen¹, Ming-Chung Wu¹ (1.Chang Gung Univ.)

Keywords:perovskite solar cells, low-temperature process

With the shortage of energy, developing the alternative energy sources becomes an important issue. Solar energy is considered as one of the most important alternative energy source because it is inexhaustible. Among many types of solar cells, the metal halide perovskite solar cells (PSCs) is the most promising solar cells due to its high solar-to-electric power conversion efficiency (PCE). The PCE of PSCs has rapidly increased from 3.8% to 22.7% since 2009 . The high-efficiency PSCs typically required high-temperature-annealed (over 450 ℃) TiO₂ (HT-TiO₂) as hole blocking layer (HBL). However, the high-temperature process often limits the application in flexible solar cells and costs more energy. In this regard, we synthesized very fine TiO₂ nanoparticles under 150 ℃ (LT-TiO₂) as HBL material and the spray-coating method was employed for the deposition of LT-TiO₂. In this study, all the fabrication processes were under low temperature. We investigated the crystal structure, and surface morphology of our HBL, and the correlation between the interface of the HBL and perovskite active layer. Finally, we successfully developed a PSCs without the need of high-temperature annealing process and obtained a higher PCE than the typical PSCs which under high-temperature process.