Fully indium-free flexible Ag nanowires/ZnO:F composite transparent conductive electrodes with high haze can improve the perovskite solar cell efficiency.

Copper (I) iodide (CuI) films are grown on glass substrates with a direct vacuum thermal evaporation method, and the effect of substrate temperature on their photoluminescence and transparent conductive properties is discussed. The X‐ray diffraction (XRD) measurement identifies the polycrystalline CuI film has γ‐phase with (111) preferential growth direction. When the substrate temperature is optimised at 120 °C, the average transmittance is about 90% in the wavelength range of 410–1500 nm. The electrical properties measured by Hall effect show the lowest resistivity of 1.0 × 10−2 Ωcm with hole concentration of 3.0 × 1019 cm−3 and mobility of 25 cm2 V−1s−1. These results indicate that direct thermal deposition is a simple method to grow high quality p‐type CuI films.

Post-thermal annealing and in situ doping are adopted to tune the physical properties of PLD-NiO films.

Controlling the interface quality and surface microstructure of the cuprous oxide (Cu 2 O) p−n homojunction is crucial to obtaining high-efficiency film solar cells. However, the low-cost synthetic techniques for preparing such homojunction structures with a high-quality interface and designed surface microstructure still remain a challenge because of the doping difficulty for the n-type of Cu 2 O, especially with aqueous precursors. Herein, we report an electrochemical deposition approach to growing the Cu 2 O p− n homojunction by selecting proper electrolytes of different pH levels. The Cu 2 O film growth orientation and surface microstructure are controlled by adjusting the applied deposition potential and the precursor concentration. The epitaxial growth of the Cu 2 O homojunction with n/p films of the same crystal orientation reduces the interface states and the formation of a textured structure on the surface helps the photons to be absorbed more effectively, which both enhance the photovoltaic conversion efficiency of Cu 2 O film solar cells. Our findings provide an effective method for the fabrication of Cu 2 O homojunctions with a high-quality interface and textured surface, which can pave the way to further improve the photovoltaic properties of Cu 2 O-based film solar cell devices.

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