Abstract
This work reported the successive incorporation of tetrabutylammonium (TBA) into Methylammonium lead Iodide (MAPbI3) perovskite. The thin films were characterized by X-Ray diffraction (XRD), Scanning electron microscopy (SEM), Transmittance electron microscopy (TEM), Atomic force microscopy (AFM), and UV-Visible spectroscopy. It was shown that introducing TBA increases the crystallinity, grain size, surface morphology without pin-hole, and roughness of the MAPbI3 thin films. Moreover, the MA(1-X)TBAX PbI3 thin film shows better stability in a relative humidity of ∼60% after 15 days than the pure MAPbI3 thin film. The obtained results are hoped to be helpful for stability and improvement of the performance of the MAPbI3 thin films by doping TBA cations under ambient conditions.
Highlights
To begin with, nowadays, the Perovskites with formula ABX3 (A = cation (Formamidinium (FA), Methylammonium (MA).), B = metal cation and X is a halogen anion VII halides (Br−, Cl−, I−)), have been demonstrated good absorbers properties for solar cells with higher photovoltaic conversion efficiency (PCE) (Fakharuddin et al, 2019; Weidman et al, 2019)
Thin films perovskite MA1−xTBAxPbI3 were successfully deposited on FTO back contact using a simple spin-coating technique
The characteristic peaks located at 14° and 28° match to X-ray diffraction (XRD) planes of (110) and (220) respectively in agreement with MAPbI3 structure (Ono et al, 2015; Abdelmageed et al, 2016) without any PbI2 binary phase
Summary
Methylammonium lead triiodide (MAPbI3) solar cells show good optoelectronic properties with a bandgap between 1.4 and 1.5 eV (Wang et al, 2019), a high absorption coefficient around 105cm−1 (Im et al, 2011; De Roo et al, 2016) with amazing PCE = 25% (Xiao et al, 2014; Park, 2015). Concerning to improve the stability of MAPbI3, MAPbI3 was doped by cesium and showed the potential to enhance the stability of MaPbI3 solar cell under UV irradiance conditions (Niu et al, 2016); on the road for stable MAPbI3, the divalent anion Se2− was incorporated in MAPbI3 structure to increase the atomic interactions between the inorganic and the organic cations (Gong et al, 2018; Li et al., 2018). Significant improvement was found in the crystallinity, morphology, optical properties, and stability of the MA(1-X)TBA(X) PbI3 thin film. UV-VIS and PL spectra were characterized using Ocean Optics HR4000 spectrophotometer in the range of 300–850 nm and He-Cd laser source Si-CCD detector Hamamatsu for PL analysis, respectively
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
