Bilateral Geiger mode avalanche in InSe Schottky photodiodes.

Avalanche photodiodes are crucial in emerging weak light signal detection fields. However, most avalanche photodiodes either suffer from relatively high breakdown voltage or relatively low gain, impairing the advantages of avalanche multiplication. Herein, we report the bilateral Geiger mode avalanche in two-dimensional Graphene/InSe/Cr asymmetrical Schottky junction.

Carrier Recirculation Induced Ultrasensitive Photodetectors of InSe/CdTe Heterostructure Featuring an Interfacial Holes Layer.

Photodetectors (PDs) based on mix-dimensional heterojunctions (MDHJs) built from 2D layered materials and covalent-bonded semiconductors show the prospect of compensating the intrinsic weakness of 2D materials to realize their full potential. However, there is an open issue to improve the temporal response of PDs while maintaining high gain and sensitivity. Herein, photoconductive type MDHJs PDs with 2D InSe and covalent-bonded CdTe thin film are designed and fabricated in which InSe is the active layer and CdTe is the medium gain one.

Electrically Tunable Multiple-Effects Synergistic and Boosted Photoelectric Performance in Te/WSe Mixed-Dimensional Heterojunction Phototransistors.

Mix-dimensional heterojunctions (MDHJs) photodetectors (PDs) built from bulk and 2D materials are the research focus to develop hetero-integrated and multifunctional optoelectronic sensor systems. However, it is still an open issue for achieving multiple effects synergistic characteristics to boost sensitivity and enrich the prospect in artificial bionic systems. Herein, electrically tunable Te/WSe MDHJs phototransistors are constructed, and an ultralow dark current below 0.

Direct biodiesel production from wet microalgae biomass of Chlorella pyrenoidosa through in situ transesterification.

A one-step process was applied to directly converting wet oil-bearing microalgae biomass of Chlorella pyrenoidosa containing about 90% of water into biodiesel. In order to investigate the effects of water content on biodiesel production, distilled water was added to dried microalgae biomass to form wet biomass used to produce biodiesel. The results showed that at lower temperature of 90°C, water had a negative effect on biodiesel production.