Argon-Assisted Spray-Coating Induced Efficient and Stable MAPbI₃ Perovskite Solar Cells

Abstract

Due to toxic antisolvents, low material utilization rate, and limitations in scalable fabrication, the spin-coating method is unsuitable for the practical application of perovskite solar cells (PSCs). This work reports an argon-assisted spray-coating process for fabricating mesoporous MAPbI3 PSCs in ambient air. We obtained pinhole-free and uniform perovskite films by optimizing the nucleation and crystallization. The optimal device’s power conversion efficiency (PCE) reached 16.34% with long-time shelf stability.

Spray-coated Inorganic Lead-free Double Perovskite Cs2AgBiBr6 Based Large-scale Triboelectric Nanogenerator for Enhanced Energy Harvesting

“…S3 also showed the roughness of each lm. As an important parameter for the measurement of the surface state, the surface roughness (measured by the root mean square value, RMS) data characterized by AFM elucidates that spraying lm [55] with lower undulation has more effective contact area when a contactseparation TENG works, causing an improved triboelectric charge density.…”

“…Measured trap density of spin-coated and sprayed lms are cm −3 and cm − 3 respectively, while the mobility were cm 2 /(V•s) and cm 2 /(V•s). The phenomenon of defect reduction and mobility improvement arises from the fact that sprayed [55] CABB lms are more compact and smooth, have a better carrier transport capacity due to a full contact area. This displays a preponderance on carrier transportation as the AFM picture in Fig.…”

Spray‐Coated Inorganic Lead‐Free Double Perovskite Cs2AgBiBr6 Based Large‐Scale Triboelectric Nanogenerator for Enhanced Energy Harvesting

“…Corresponding AFM pictures in Figure S3 (Supporting Information) also showed the roughness of each film. As an important parameter for the measurement of the surface state, the surface roughness (measured by the root mean square value, RMS) data characterized by AFM elucidates that sprayed film [39] with lower undulation has more effective contact area when a contact-separation TENG works, causing an improved triboelectric charge density.…”

“…Measured trap density of spin-coated and sprayed films are 3.68 × 10 15 and 1.28 × 10 14 cm −3 respectively, while the mobility were 1.09 × 10 −5 and 3.49 × 10 −4 cm 2 V −1 s −1 . The phenomenon of defect reduction and mobility improvement arises from the fact that sprayed [39] CABB films are more compact and smooth, have a better carrier transport capacity due to a full contact area. This displays a preponderance on carrier transportation as the AFM picture in Figure S3 (Supporting Information) depicts.…”

Air-processed MAPbI3 perovskite solar cells achieve 20.87% efficiency and excellent bending resistance enabled via a polymer dual-passivation strategy

“…5d presents that the PCE of our MAPbI 3 -based device is evidently outstanding in comparison with the reported works. [44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62] Fig. 5e implies that the light intensity is dependent on V oc , making further sense of the charge carrier recombination changes, and their expression was derived from the equation:…”