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The as-obtained 6% CoOOH-TiO2photoelectrode manifests enhanced PEC performance owing to the fast carrier migration across TiO2to CoOOH. And the valence transition of surface amorphous CoOOH plays a dominating role in the PEC process.

Synergistic modifying TiO2with a thin C60layer and replacing lithium-doped small molecule with an un-doped conjugated polymer leads to an increase of 69% in efficiency for bismuth-halide double perovskite based solar cells.

With ideal combination of benefits that selectively converts high photon energy spectrum into electricity while transmitting low energy photons for photosynthesis, the CH3NH3PbBr3perovskite solar cell (BPSC) is a promising candidate for efficient greenhouse based building integrated photovoltaic (BIPV) applications. However, the efficiency of BPSCs is still much lower than their theoretical efficiency. In general, interface band alignment is regarded as the vital factor of the BPSCs whereas only few reports on enhancing perovskite film quality. In this work, highly efficient BPSCs were fabricated by improving the crystallization process of CH3NH3PbBr3with the assistance of anti-solvents. A new anti-solvent of diphenyl ether (DPE) was developed for its strong interaction with the solvents in the perovskite precursor solution. By using the anti-solvent of DPE, trap-state density of the CH3NH3PbBr3film is reduced and the electron lifetime is enhanced along with the large-grain crystals compared with the samples from conventional anti-solvent of chlorobenzene. Upon preliminary optimization, the efficiencies of typical and semitransparent BPSCs are improved to as high as 9.54% and 7.51%, respectively. Optical absorption measurement demonstrates that the cell without metal electrode shows 80% transparency in the wavelength range of 550–1000 nm that is perfect for greenhouse vegetation. Considering that the cell absorbs light in the blue spectrum before 550 nm, it offers very high solar cell efficiency with only 17.8% of total photons, while over 60% of total photons can transmit through for photosynthesis if a transparent electrode can be obtained such as indium doped SnO2.

Organic–inorganic single-crystalline perovskites have attracted significant attentions due to their exceptional progress in intrinsic properties’ investigation and applications in photovoltaics and optoelectronics. In this study, the large perovskite CH3NH3PbI3single crystal with the largest length of 80 mm was prepared through the method of inverse-temperature crystallization. Meanwhile, the mass production of integrate photodetectors have been fabricated on the single-crystalline wafer and the photoresponse performances were investigated. The results show that the single-crystalline photodetectors have broad spectrum response to 900 nm, rapid response speed (<40 µs) and excellent stability. These findings are of great importance for future promising perovskite single crystalline for integrated photoelectronic application.

During the nucleation process, cis-AZO reacts with cations in perovskite precursor by synergistic cation-π interaction and Lewis base coordination, which can accelerate the conversion of δ- to α-phase of FAPbI3and passivate grain surface.

Herein, 2D/3D (CF3-PEA)2FA0.85MA0.15Pb2I7/FA0.85MA0.15PbI3heterojunction perovskite solar cell (PSC) with an efficiency of 23.1% was obtained, which is one of the best reported PSCs with 2D/3D structure.