Magnetic Field-Assisted Perovskite Film Preparation for Enhanced Performance of Solar Cells

Abstract

Perovskite solar cells (PSCs) are promising low-cost photovoltaic technologies with high power conversion efficiency (PCE). The crystalline quality of perovskite materials is crucial to the photovoltaic performance of the PSCs. Herein, a simple approach is introduced to prepare high-quality CHNHPbI perovskite films with larger crystalline grains and longer carriers lifetime by using magnetic field to control the nucleation and crystal growth. The fabricated planar CHNHPbI solar cells have an average PCE of 17.84% and the highest PCE of 18.56% using an optimized magnetic field at 80 mT. In contrast, the PSCs fabricated without the magnetic field give an average PCE of 15.52% and the highest PCE of 16.72%. The magnetic field action produces an ordered arrangement of the perovskite ions, improving the crystallinity of the perovskite films and resulting in a higher PCE.

Enhanced Device Performance of Perovskite Photovoltaics by Magnetic Field‐Aligned Perovskites‐Magnetic Nanoparticles Composite Thin Film

“…The photocurrent hysteresis behaviors are further investigated through the J-V characteristics of PSCs measured under different scan directions at a scan rate of 0.60 V/s and the results are shown in Figure 5b-d. The photocurrent hysteresis is quantitatively described by the hysteresis index (HI), which is defined as [72] where [28][29][30][31][32][33][34][35] The PPDs with the same device structure as that for PSCs is also investigated. Figure 6a presents the J-V characteristics of PPDs measured both in dark and under the monochromatic light at the wavelength of 500 nm with the light intensity of 0.28 mW cm -2 at room temperature.…”

“…The perovskite active layer was prepared by a two-step method. [5,6,[34][35][36] (TPC) measurements were conducted on home-made setup as our previous reports. [39][40][41]…”

“…[31] Müller-Buschbaum revealed that enhanced PCEs from BHJ OPVs with the presence of Fe 3 O 4 MNPs was attributed to reduced recombination current by increased spin-orbit coupling. [32] Numerous reports have indicated that an EMF plays a role in perovskite devices, [34][35][36] but perovskite photovoltaics by perovskites mixed with MNPs and further aligned by an EMF was rarely reported.…”

Ambient Manipulation of Perovskites by Alternating Electric Field toward Tunable Photovoltaic Performance

“…To resolve that, approaches by physical methods such as electromagnetic fields have been performed on the perovskite fabrication which have been reported to induce significant change in the structural and opto‐electronic properties of materials. [ 20–22 ] Recently, some groups have found that some reversible morphological and structural responses (normally described as electrostrictive and electroelastic properties [ 23 ] ) could be induced by certain external electric fields. Moreover, unlike classical perovskites and semiconductors, hybrid metal halide perovskites have shown excellent ion transport ability which has played an important part in their performance [ 24,25 ] and induced some unique behaviors in devices, e.g., significant hysteresis in J – V characteristics of PSCs.…”

Effects of intensity of magnetic field generated by neodymium permanent magnet sheets on electrical characteristics of monocrystalline silicon solar cell

“…The cell films with larger crystalline gain and longer carrier lifetimes had an average PCE of 17.84% and the highest PCE of 18.56% using an optimized magnetic field at 80mT. In contrast, the PSCs fabricated without a magnetic field give an average PCE of 15.52% and the highest PCE of 16.72% [22]. The effect of a magnetic field on the photocurrent generated by a bulk heterojunction solar cell made from poly-3-hexylthiophene (P3HT) and [6,6]-phenyl C61-butyric acid methyl ester (PCBM) was investigated.…”