Low-temperature solution-processed Mg: NiOx hole transport layers for formal (n-i-p) perovskite solar cells

Effect of Yttrium-Incorporated TiO2 Electron Transport Layer on the Photovoltaic Performance of Triple-Cation Perovskite Solar Cells

“…As displayed in Figure a, the two samples exhibit similar absorption curves with little variation throughout the UV–vis range, suggesting that the incorporation of Y has little effect on the absorption spectra of TiO 2 ETL. The energy band gap ( E g ) can be obtained from the absorption spectra according to the Tauc equation . The Tauc plots are shown in the inset.…”

“…The energy band gap (E g ) can be obtained from the absorption spectra according to the Tauc equation. 26 The Tauc plots are shown in the inset. The E g values of TiO 2 ETL and Y-TiO 2 ETL are estimated to be 3.49 and 3.46 eV, respectively.…”

A review on conventional perovskite solar cells with organic dopant-free hole-transport materials: roles of chemical structures and interfacial materials in efficient devices

“…31 To construct stabilized and efficient conventional PSCs, continuous global efforts are underway to develop dopant-free HTMs, including inorganic and organic materials. 32,33 Inorganic HTMs, such as CuSCN, 34,35 NiO x , 36,37 and Cu 2 O, 38 are characterized by low-cost, high mobility, and strong intrinsic stability. However, they are generally processed using polar solvents and high-temperature treatment, which are incompatible with the MHPs.…”