Three-Dimensional Nanopillar Arrays-Based Efficient and Flexible Perovskite Solar Cells with Enhanced Stability

Abstract

Perovskite nanopillars (PNPs) are propitious candidates for solar irradiation harvesting and are potential alternatives to thin films in flexible photovoltaics. To realize efficient daily energy output, photovoltaics must absorb sunlight over a broad range of incident angles and wavelengths congruent with the solar spectrum. Herein, we report highly periodic three-dimensional (3D) PNPbased flexible photovoltaics possessing a core−shell structure. The vertically aligned PNP arrays demonstrate up to 95.70% and 75.10% absorption at peak and under an incident angle of 60°. The efficient absorption and the orthogonal carrier collection facilitate an external quantum efficiency of 84.0%−89.18% for broadband wavelength. PNPs have been successfully implemented in flexible solar cells. The porous alumina membrane protects PNPs against water and oxygen intrusion and thereby imparts robustness to photovoltaic devices. Meanwhile, the excellent tolerance to mechanical stress/strain enables our unique PNP-based device to provide efficient solar-toelectricity conversion while undergoing mechanical bending.

Full-color fiber light-emitting diodes based on perovskite quantum wires

“…Besides the malleability of Al fiber and PDMS protection, such flexible features are also profiting from the 3D PAM template. During deformation, almost all the compressive or tensile stress is concentrated in PAM template, which substantially mitigates the stress and tension on PeQWs ( 52 , 53 ). Consequently, all the functional materials are sandwiched between three layers of stress reliever: PDMS, PAM, and malleable Al fiber, thus ensuring highly flexible devices.…”

Recent Advances in Quality Strengthening of Perovskite Films by Additive Engineering for Efficient Solar Cells

“…In contemporary times, there has been a surge of interest in FPSCs due to their prospective utilization in portable and wearable electronic commodities. [106][107][108][109] At the same time, with the deepening of research, FPSCs are also facing some challenges different from PSCs. First, when the FPSCs substrate is bent or stretched, the perovskite layer may generate cracks that directly hinder the carrier transmission and lead to the performance loss of the gadget.…”

Optimized absorption of light in perovskite nanowire solar cells

“…Indeed, the possibilities of reducing the defect density and high carrier diffusion lengths in PrvNWs make them an interesting alternative to conventional perovskite thin-film devices [24], with reported diffusion length of up to 41 μm for PrvNWs [25]. Additionally, PrvNWs enable flexible thin-film photovoltaics [26]. PrvNWs have been fabricated both as membranes with non-oriented NWs [27], as well as with highly ordered template-assisted fabrication for vertical array of PrvNWs, especially in anodized aluminum oxide templates comprising vertically aligned nanochannels [18].…”