Difference of carrier dynamics in a semiconductor saturable absorber mirror with and without B ion-implantation.

Three samples whose growth temperatures were 450°C, 500°C, and 560°C for , , and , respectively, were tested by femto-second time-resolved transient absorption spectroscopy. The results indicate that the carrier dynamics of excited state absorption were dominant, and the lifetimes of carriers trapped by defect levels were about tens of pico-seconds. To further study the influence of carrier dynamics and recovery time of samples by ion-implantation, ions of 80 and 130 KeV were implanted into the samples with dose of 10/ .

Dynamic Interface with Enhanced Visible-Light Absorption and Electron Transfer for Direct Photoreduction of Flue Gas to Syngas.

The direct usage of CO in the flue gas to produce fuels or chemicals is of great significance from energy-saving and low-cost perspectives, yet it is still underexplored. Herein, we report the photoreduction of CO from the simulated industrial exhaust by synergistic catalysis of TEOA and a metal-free composite (COF1-g-CN) fabricated via covalently grafting COF1 with g-CN. The hydrogen bond interaction between TEOA and hydrazine units on COF1 is detected in diluted CO, which leads to significantly enhanced light absorption in the whole visible-light region.

Synergetic effect of H adsorption and ethylene functional groups of covalent organic frameworks on the CO photoreduction in aqueous solution.

We prepare a novel COF for CO2 photoreduction with 99.9% CO selectivity in aqueous solution without a cocatalyst. DFT shows that the preferential adsorption of H+ on the COF results in increased CO2 adsorption energy providing an anchoring site of CO2, and with the cooperation of an ethylene group, CO2 reduction is triggered.

A ruthenium/polyoxometalate for efficient CO photoreduction under visible light in diluted CO.

A system containing polyoxometalate ([Co-POM]) and [Ru(bpy)] as constructed for visible-light-induced CO conversion to syngas. In diluted CO, high efficiency of 56.8 mmol g h in syngas production was gained, exceeding that of reported systems with [Ru(bpy)] participation in similar conditions.

Mn-doped CsPb(Br/Cl) mixed-halide perovskites for CO photoreduction.

Halide perovskites have been employed as photocatalysts for CO photoreduction due to their excellent optical properties and unique electronic structure. However, their photocatalytic performance is relatively poor. Herein, we demonstrate a new strategy with Mn-doped CsPb(Br/Cl) mixed-halide perovskites as catalysts to enhance the efficiency of CO photoreduction.