Accelerated formation and improved performance of CH₃NH₃PbI₃-based perovskite solar cells via solvent coordination and anti-solvent extraction

Abstract

A new strategy to accelerate conversion of PbI2 to perovskite and improve solar cell performance via a solvent coordination and anti-solvent extraction process.

A Biopolymer Heparin Sodium Interlayer Anchoring TiO2 and MAPbI3 Enhances Trap Passivation and Device Stability in Perovskite Solar Cells

“…As a result, the number of extracted photocarriers and ultimate PCE in the presence of traps tend to decrease due to losses via Shockley–Read–Hall (SRH) recombination . To date, there have been documented examples for mitigating the influences of traps/defects in the bulk film of perovskites by solvent additives, spin procedure optimization, or surface treatments . These approaches via the modulation on grain sizes, grain boundaries, or relevant structural properties enable to control the density of traps and related bulk properties .…”

Retardation of Trap‐Assisted Recombination in Lead Halide Perovskite Solar Cells by a Dimethylbiguanide Anchor Layer

“…The amounto f extracted photo-carriers and eventual PCEs tend to be hampered by losses through Shockley-Read-Hall (SRH) recombina-tion. In this regard, there have been many strategies to control the trap level in perovskite thin films through optimizing the grain size, grain boundaries,a nd relateds tructural properties by additive engineering, [7][8][9][10][11][12][13] surface treatments, [14][15][16][17][18][19][20] film casting procedures, [21] etc. To fully reach the potentials of well-engineering perovskite crystallization with reduced bulk traps, there is an urgent need to attain efficient surfacep assivation for perovskite films with which chargee xcitation in the solar cells is promoted with mitigated interfacial charget rapping and resultant SRH recombination.…”

Enhanced device performance and stability of perovskite solar cells with low-temperature ZnO/TiO2 bilayered electron transport layers

“…As mentioned above, the appearance of a shoulder at around 498 nm for the perovskite/ZnO-NP lm indicates the partial decomposition of perovskite into PbI 2 . 27 Also, we fabricated perovskite solar cells based on lowtemperature TiO 2 -only ETLs to see if the performance enhancement just comes from the usage of TiO 2 . The typical J-V curve of the TiO 2 -only device is shown in Fig.…”