[10a-PB1-1~34] 12.5 Organic solar cells

▲ [10a-PB1-13] Control Properties of TiO₂ Electron Transport Layer for High Efficiency Perovskite Solar Cells

〇Lee KunMu¹, Lin WeiJhih¹ (1.Chang-Gung Univ.)

Keywords:perovskite solar cells, electron transport layer, TiO2

We investigate the influence of electron collection and transportation of TiO₂ electrode (ETL) on conventional n-i-p type mesoscopic perovskite solar cells, especially focus on the effect of compact TiO₂ layer (cl-TiO₂), thickness of mesoporous TiO₂ (meso-TiO₂) layer, TiO₂ nanoparticle (NP) size in meso-TiO₂ layer and post-treatment on perovskite solar cells. The cl-TiO₂ layer is controlled by spray pyrolysis deposition method. The various size of TiO₂ NPs with high purity anatase phase are synthesized and further to optimal the meso-TiO₂ thickness to improve the electron collection and transport efficiency, and to reduce the J-V hysteresis behavior of perovskite solar cells. After improving the fabrication process of TiO₂ ETL, the best performance of PSC shows the power conversion efficiency of 19.39% (reverse scan) and 19.12% (forward scan), respectively, under 100 mW/cm² (AM 1.5G) and shows the excellent CPE of 25.49% under the illumination of 6000 lx of T5 light source.