Unraveling the high performance of tri-iodide perovskite absorber based photovoltaics with a non-polar solvent washing treatment

Optical, Excitonic, and Electronic Properties of CH3NH3PbI3 Thin Films and Their Application in Photovoltaics

“…Furthermore, organic solvent or inert gas is injected into CH 3 NH 3 PbI 3 precursors during the spin coating process, which can obtain CH 3 NH 3 PbI 3 thin films with good continuity and excellent PCE of 17.8%. In order to verify the mechanism of this method, we used a SEM, a 2D-XRD and fluorescence spectroscope to analyze CH 3 NH 3 PbI 3 thin films fabricated with and without toluene washing treatment [14]. Figure 13 shows the morphologies of CH 3 NH 3 PbI 3 thin films fabricated with and without toluene treatment.…”

“…Figure 13. The SEM images of CH 3 NH 3 PbI 3 thin films; (a) without toluene treatment; (b) with toluene treatment [14].…”

“…This chapter will describe the optoelectronic properties, molecular structure, and fabrication method of perovskite materials, and calculate the effects of the nanoplasmonic structure on exciton generation and the dissociation of perovskite materials. In addition, it will use scanning electron microscope (SEM), two-dimensional X-ray diffractometer (2D-XRD), UV-vis spectrometer and photoluminescence to explore the morphology, structure, and electronic and excitonic properties of CH 3 NH 3 PbI 3 thin films formed by a solution process with and without a nonpolar solvent washing treatment [14], and will discuss the development direction and potential of the perovskite photovoltaics.…”

Nanoscale control of grain boundary potential barrier, dopant density and filled trap state density for higher efficiency perovskite solar cells

“…Therefore, deeper understanding of degradation mechanisms and tolerance to humidity is highly critical by judicial design principles and engineering of device architecture/geometry towards improving the stability aspects of perovskite photovoltaics . In this regard, to understand the effects of humidity, studies have reported on the post‐treatment of perovskite film by exposing it to controlled humidity conditions . In this context, You et al showed an increase in performance of perovskite solar cells by exposing the perovskite precursor film in a humid atmosphere .…”

“…[29][30][31] In this regard, to understand the effects of humidity, studies have reported on the post-treatment of perovskite film by exposing it to controlled humidity conditions. 26,[32][33][34][35][36] In this context, You et al showed an increase in performance of perovskite solar cells by exposing the perovskite precursor film in a humid atmosphere. 37 However at the same time, it was also reported that the presence of moisture rapidly dissociates CH 3 NH 3 PbI 3 into lead iodide and methylammonium iodide which reduces the overall photovoltaic performance.…”