High voltage in hole conductor free organo metal halide perovskite solar cells

Abstract

High voltage hole conductor free perovskite solar cell achieved 1.35 V.

Structural and Quantitative Investigation of Perovskite Pore Filling in Mesoporous Metal Oxides

“…Both patterns are of ring-type, which indicates the presence of a large number of randomly-oriented nanoscale crystallites in each of the perovskite layers. The strongest diffraction is observed around inter-planar spacing of 3.17-3.2 Å in both patterns, which reasonably matches the reported data for the tetragonal I4/mcm (a = b = 8.87 Å, c = 12.67 Å) perovskite [25,28,31]. However, the sets of diffraction reflexes appearing in both patterns do not coincide.…”

“…Cross-section TEM images of the devices are presented in Figure 1A,B. The thicknesses of metal oxides-which demonstrate high PCEs that we studied in this work-are based on our previous reports [15,28]. The current voltage curves of this study's cells are shown in Figure 2A, the hole conductor free TiO 2 / MAPbI 3 cell has V oc of 0.85 V, current density (Jsc) of 18 mA/cm 2 , fill factor (FF) of 56% with efficiency of 8.5%.…”

Solution‐Grown Monocrystalline Hybrid Perovskite Films for Hole‐Transporter‐Free Solar Cells

“…This device performance surpasses, by over 17%, other hole-transporting layer (HTL)-free polycrystalline MAPbBr 3 solar cells reported to date, [29,30] and is even comparable to those of devices with a HTL. [25,31] The average efficiency of 12 monocrystalline devices using this structure with 1 to 4 µm thick crystals is 5.67 ± 0.44% ( Figure S9, Supporting Information).…”

“…This is in agreement with the energy difference between the Fermi levels of TiO 2 and MAPbBr 3 (ΔE~1.4 eV), which is larger than that between ITO and MAPbBr 3 . The V OC is also the highest among reported MAPbBr 3 solar cells without a HTL, [29,30] and is on par with the best performing cells with a custom-designed HTL. [25] Such improvements clearly imply that the TiO 2 /perovskite-based devices extract electrons more efficiently than ITO/perovskite based devices.…”

Light-Induced Increase of Electron Diffusion Length in a p–n Junction Type CH3NH3PbBr3 Perovskite Solar Cell

“…The p-type nature of the Br perovskite has been suggested in the past both in experimental and theoretical papers 36,37 . Our EBIC results support this finding and illustrate for the first time the working mechanism of this photovoltaic device.…”