Effect of Different CH3NH3PbI3 Morphologies on Photovoltaic Properties of Perovskite Solar Cells

Abstract

In this study, the perovskite layers were prepared by two-step wet process with different CH3NH3I (MAI) concentrations. The cell structure was glass/FTO/TiO2-mesoporous/CH3NH3PbI3 (MAPbI3)/spiro-OMeTAD/Ag. The MAPbI3 perovskite films were prepared using high and low MAI concentrations in a two-step process. The perovskite films were optimized at different spin coating speed and different annealing temperatures to enhance the power conversion efficiency (PCE) of perovskite solar cells. The PCE of the resulting device based on the different perovskite morphologies was discussed. The PCE of the best cell was up to 17.42%, open circuit voltage of 0.97 V, short current density of 24.06 mA/cm2, and fill factor of 0.747.

Tetrabutylammonium (TBA)-Doped Methylammonium Lead Iodide: High Quality and Stable Perovskite Thin Films

“…The 68 and 142 cm −1 bands matched with the obtained results from XRD that confirmed the incorporation of TBA, which plays a vital role in the formation of crystallinity(Fateev et al, 2018).Figure3illustrates the SEM images of MA 1−x TBA x PbI 3 where X % (0%, 1%, 2.5%, 5%, 10%). The undoped MAPbI 3 shows a small grain size with a smooth surface and good distribution of lead and iodide(Chen et al, 2018). In the same way, the TBA incorporation increase gradually grain size of 210 nm for pure MAPbI 3 , 290 nm for the doped MAPbI 3 with 1.0% TBA, 490 nm for 2.50% TBA as well as with a higher value of 500 nm for 5.0%…”

Enhanced Efficiency of MAPbI3 Perovskite Solar Cells with FAPbX3 Perovskite Quantum Dots

“…Hybrid organic-inorganic perovskite materials have been widely accepted and applied in solar cells. The power conversion efficiency has evolved from 3.8% in 2009 to a certified value of 22.7% in 2018 [1,2,3,4,5]. Perovskite materials are a versatile material with unique optoelectronic properties, exhibiting strong light absorption, long diffusion length, and high mobility [6].…”

Spacer Cation Engineering of Two-Dimensional Hybrid Perovskites with Tunable Band Alignment and Optoelectronic Properties

“…To examine the reasonability of our developed PCE model, we make a comparison of PCE values among our developed model and other methods, including Scharber’s model and the spectroscopic limited maximum efficiency (SLME) method . Using the experimental data of MAPbI 3 -based and 2D HLIP-based devices from previous literatures − as input parameters, including E g , FF, V OC , and L , the PCE values of these perovskite solar cells have been calculated and listed in Table . It can be seen that the predicted η values obtained by our developed model agree well with the experimental data, but other methods overestimate the PCE values.…”