XRD and SEM characterizations suggest that compact and uniform films with large grain sizes and high crystallinity can be obtained utilizing PbI2. The power conversion efficiency of the FTO/compact-TiO2/MAPbBr3/Spiro-OMeTAD/Ag device increased from 5.3% to 7.6% after changing the PbBr2 precursor ...
The insets in Fig. 1(a) are the high resolution top-view SEM images of a microplate and a microrod. We can see that the boundaries of perovskite microplate and microrod are extremely smooth and uniform. It is hard to see clear flaws and fluctuations even though the scar bar is ...
The morphologies and elemental analyses of the products were observed by field-emission scanning electron microscopy (FE-SEM, JSM-7000 F) in energy-dispersive spectroscopy (EDS) mode. X-ray photoelectron spec- troscopy (XPS, PHI 5000 Versa Probe) was used to identify the elemental ...
XRD and SEM characterizations suggest that compact and uniform films with large grain sizes and high crystallinity can be obtained utilizing PbI"2. The power conversion efficiency of the FTO/compact-TiO"2/MAPbBr"3/Spiro-OMeTAD/Ag device increased from 5.3% to 7.6% after changing the PbBr"2 ...
SEM and AFM images revealed that grains for the pure sample are highly compact linked with each other with sharp grain boundaries but their size increased when doped with 4AMP. A direct bandgap of 2.341eV is noticed for pristine which is slightly decreased to 2.311eV as a result of doping....
Perovskite films were characterized by XRD, UV-Vis, SEM, AFM, PESA and Kelvin probe. The results show a cubic structure perovskite (XRD), band gap of 2.28 eV (UV-Vis), 3 mu m thickness and uniform grain distribution (SEM), roughness reduction from 118 nm to 6 nm (AFM), valence ...
Perovskite films were characterized by XRD, UV-Vis, SEM, AFM, PESA and Kelvin probe. The results show a cubic structure perovskite (XRD), band gap of 2.28 eV (UV-Vis), 3 mu m thickness and uniform grain distribution (SEM), roughness reduction from 118 nm to 6 nm (AFM), valence ...
Figure 2. SEM images of the one-step spin-coated CH3NH3PbBr3 film samples on (a) PEDOT:PSS, (b) PEDOT:PSS/MoO3-ammonia (1:0.01), (c) PEDOT:PSS/MoO3-ammonia (1:0.02), (d) PEDOT:PSS/MoO3-ammonia (1:0.03) composite HTLs, and three-step spin-coated CH3NH3PbBr3 film samples...
The size of the microcrystals was determined by a statistical evaluation of SEM-data. As expected for an aerosol method, there is a polydisperse distribution of sizes, ranging from several 100 nm to several μm (Figure S4a). However, it can be seen that the presence of an excess MABr has...