[en] Graphical abstract: - Highlights: • All solution processed perovskite solar cells were realized with Ag nanowires. • ZnO nanoparticles were used as electron transport layer. • The solar cells showed a photovoltaic behavior with efficiency of 9.21%. • Device performance showed negligible difference between forward and reverse scan. - Abstract: In this paper, we reported a low temperature processed planar heterojunction perovskite solar cell employing silver nanowires as the top electrode and ZnO nanoparticles as the electron transport layer. The CH_3NH_3PbI_3 perovskite was grown as the light absorber via two-step spin-coating technique. The as-fabricated perovskite solar cell exhibited the highest power conversion efficiency of 9.21% with short circuit current density of 19.75 mA cm"−"2, open circuit voltage of 1.02, and fill factor value of 0.457. The solar cell's performance showed negligible difference between the forward and reverse bias scan. This work paves a way for realizing low cost solution processable solar cells.

[en] In this work, we report an all-solution route to produce semi-transparent high efficiency perovskite solar cells (PSCs). Instead of an energy-consuming vacuum process with metal deposition, the top electrode is simply deposited by spray-coating silver nanowires (AgNWs) under room temperature using fabrication conditions and solvents that do not damage or dissolve the underlying PSC. The as-fabricated semi-transparent perovskite solar cell shows a photovoltaic output with dual side illuminations due to the transparency of the AgNWs. With a back cover electrode, the open circuit voltage increases significantly from 1.01 to 1.16 V, yielding high power conversion efficiency from 7.98 to 10.64%. (paper)

[en] Highlights: • Monolayer or few layer Molepdenum disulphide nanosheets were synthesized via aqueous hydrothermal method using MoO_3 powder source. • The synthesized nanosheets agglomerated while deposited on the substrates due to vanderwalls interaction between nanosheets. • The superior field mission properties have been achieved for MoS_2 nanosheets attributed to the sharp edges of nanosheets. - Abstract: In this work, we demonstrated the field emission properties of few layer molybdenum disulphide (MoS_2) nanosheets synthesized by a hydrothermal method. Structural investigation indicates the as-synthesized MoS_2 layers were two dimensional few layer nanosheets with a sharp atomic edges. The field emission properties of the MoS_2 nanosheets were investigated and the results indicate that the MoS_2 nanosheets had an excellent field emission performance with turn on field of 1.0 V/μm, threshold field of 2.1 V/μm, and a field enhancement factor of 9880. Furthermore, the emission current shows the stability over 2 h of continuous operation. The as-synthesized MoS_2 few layer nanosheets hold potential for application in next-generation field emission devices.