Compact TiO₂ films with sandwiched Ag nanoparticles as electron-collecting layer in planar type perovskite solar cells: improvement in efficiency and stability

Abstract

Embedding silver nanoparticles in the compact TiO2 layer effectively improves the efficiency and stability of a perovskite solar cell.

Triazine-Substituted Zinc Porphyrin as an Electron Transport Interfacial Material for Efficiency Enhancement and Degradation Retardation in Planar Perovskite Solar Cells

“…In particular, as-deposited TiO 2 exhibits lower water contact angle and higher surface energy compared to the porphyrin-modified one. As a result, the grains of the perovskite film coated on the more hydrophilic substrate are smaller due to the existence of more nucleation sites for the perovskite film growth on the unmodified substrate …”

“…As a result, the grains of the perovskite film coated on the more hydrophilic substrate are smaller due to the existence of more nucleation sites for the perovskite film growth on the unmodified substrate. 61 Next, electron injection after excitation of the perovskite films was probed using steady-state photoluminescence (PL) measurements (Figure 2e). The PL spectra of MAPbI 3 film deposited on TiO 2 exhibit a single peak at ∼780 nm with a fullwidth at half-maximum (fwhm) of ∼46 nm.…”

A Modified Triple-Diode Model Parameters Identification for Perovskite Solar Cells via Nature-Inspired Search Optimization Algorithms

“…The modified PSCs demonstrated significantly higher photovoltaic performance reaching power conversion efficiency (PCE) of 18.7%, clearly outperforming that of the control device (16.9%). This was attributed to better crystalized and more homogenous perovskite films [17,18], associated with a smoother and more functional ETL/absorber interface [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34]. The PCE enhancement for the modified devices was associated with the increase of Jsc and FF parameters, while the Voc value was…”

Manganese Porphyrin Interface Engineering in Perovskite Solar Cells

“…This might affect the formation of the perovskite layer as it is well established that nonwetting surfaces create an environment of lower surface tension, associated with less nucleation centers in comparison with the unmodified hydrophilic ones. 60 As a result, larger and more homogeneous perovskite crystals are expected to be formed. Moreover, changes in the surface electronic properties of TiO 2 upon porphyrin coverage were probed using UPS.…”

“…As is seen, the mean contact angle increases from 25.4 to 56.3° after TiO 2 is coated with porphyrin molecules. This might affect the formation of the perovskite layer as it is well established that nonwetting surfaces create an environment of lower surface tension, associated with less nucleation centers in comparison with the unmodified hydrophilic ones . As a result, larger and more homogeneous perovskite crystals are expected to be formed.…”