Abstract: The disclosure provides a single-mode external-cavity diode laser based on an s-AFPF, relates to the technical field of tunable diode laser absorption spectroscopy. A piezoelectric ceramic actuator is used to change and modulate an output center wavelength of the laser, so that the center wavelength of laser light can periodically scan an absorption spectrum band of a gas to be detected. To better apply tunable diode laser absorption spectroscopy-wavelength modulation spectroscopy to the apparatus of the disclosure, a curved groove structure is further proposed, and this structure can limit a ping-pong effect of a steel ball when vibration of KHz level from the tunable diode laser absorption spectroscopy-wavelength modulation spectroscopy appears on the piezoelectric ceramic actuator. The tunable external-cavity diode laser based on a narrow-band interference filter designed by the disclosure accurately senses the types and concentrations of various gases.

Abstract: Provided herein are small molecular acceptor compounds containing thiophene end groups, methods for their preparation and intermediates used therein, the use of formulations containing the same as semiconductors in organic electronic devices, especially in organic photovoltaic and organic field-effect transistor devices, and to organic electronic and organic photovoltaic devices made from these formulations.

Abstract: A kitchen shower includes a water outlet mechanism, a switching mechanism and a brush mechanism. The water outlet mechanism is provided with a shower water outlet, a sheet water outlet and a bubble water outlet. The switching mechanism includes a main body, a first switching assembly, a second switching assembly and a third switching component. The first switching assembly is used to switch whether the kitchen shower is out of water, the second switching assembly is used to switch the kitchen shower out of sheet water, and the second switching assembly is used to switch the kitchen shower out of shower water or bubble water. The brush mechanism is detachable and installed on the water outlet mechanism. The brush mechanism can make the kitchen shower clean at the same time of water outlet, so that the cleaning effect is higher.

Abstract: Disclosed is a shower head. The shower head comprises a water passing mechanism, a gunjet mechanism, a cover mechanism, a first switcher and a second switcher. The water passing mechanism includes a water inlet pipe and a water passing member. The water inlet pipe and the water passing member are in communication with the first switcher, respectively. The gunjet mechanism includes a jet nozzle which is in communication with the first water passage. The cover mechanism is in communication with the second water passage. The first switcher is configured to switch the water out from the gunjet mechanism or the cover mechanism. The second switcher is configured to switch the water outlet modes of the cover mechanism.

Abstract: Provided herein are small molecular acceptor compounds containing thiophene end groups, methods for their preparation and intermediates used therein, the use of formulations containing the same as semiconductors in organic electronic devices, especially in organic photovoltaic and organic field-effect transistor devices, and to organic electronic and organic photovoltaic devices made from these formulations.