The Progress of Interface Design in Perovskite‐Based Solar Cells

Abstract

Figure 20. a) Modeled J − V characteristics of a perovskite device comprising ions but no traps. b) Modeled I -V characteristics of perovskite devices comprising ions and no traps for varying ion densities. c) Modeled J − V characteristics of perovskite device comprising ions and traps with varying ion mobility as indicated in the legend at a sweep rate of 100 kV s −1 . d) Modeled J -V characteristics of a perovskite device comprising ions and bulk traps. [ 211 ] 2015, American Chemical Society. e) Flow directions of the charged ion species in a Pb|MAPbI 3 |AgI |Ag cell under electrical bias. f) Images for surfaces A and B and g) a scanning electron microscope (SEM) image of surface B on the Pb pellet. h) The same cell confi guration to Figure 23 e. i) Images of each pellets after aging at 50 °C for a week in Ar atmosphere (no current stressing). Reproduced with permission. [ 212 ]

Progress in organic-inorganic hybrid halide perovskite single crystal: growth techniques and applications

“…Currently, perovskite thin films have been under intensive investigation and most reported applications have focused on polycrystalline thin films. Accordingly, a lot of recent reviews regarding the progress in perovskites concentrate on their polycrystalline film form [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. Although the study of perovskite single crystals is just in its early stage, it is highly desirable to investigate fundamentally intrinsic properties of perovskites due to their low trap density and absence of grain boundaries.…”

Understanding surface chemistry during MAPbI3 spray deposition and its effect on photovoltaic performance

“…1 Rapid developments in device engineering along with material processing have led to power conversion efficiencies greater than 20%. 2,3 The perovskite structure is typically represented by the general formula ABX 3 , where in the case of organic-inorganic halide perovskites A is a small organic cation (CH 3 NH 3 + ), B is a metal cation (Pb 2+ ) and X is a monovalent halide anion (I À ).…”

Metal‐Nanowire‐Electrode‐Based Perovskite Solar Cells: Challenging Issues and New Opportunities

“…The pairs are subsequently separated into electrons and holes, and then the charge carriers are extracted through charge carrier transport layers (HTL and ETL) by a built-in electric field formed at the junctions between the OMHP layer and carrier transport layers. [37] ETL layers tend to have a lower conduction and valence band energy than those of OMHP layers, so that electrons can be extracted from the OMHP layer and hole transport is blocked. Obviously, TiO 2 is the most popular ETL constituent material, but other materials, such as ZnO, [48] PCBM, [49] and SnO 2 , [50] with proper band positions have also been reported.…”