Phototransistors Metal–oxide-based phototransistors conventionally have a limit to their detection range and display persistent photocurrent (PPC) phenomenon, which may hinder potential applications in devices. In article number 2006091, Hyun Jae Kim co-workers review the latest approaches for absorption layer, according surface treatment, structural engineering, materials. addition, they also ...

This study uses a new model developed in this paper to investigate the performance of heterojunction phototransistor (HPT) on SiGe technology. An electrical an optical window was based Ebers & Moll model, and its evaluated by examining error vector magnitude (EVM) when integrated into mobile communication setup. Simulations showed that HPT exhibited EVM lower than 8%, enabling 64-Quadrature...

A polydopamine (PDA) thin film with a dense and conformal surface was prepared under optimized deposition conditions using O2 gas as an oxygen source. The PDA-based organic phototransistors exhibited high photosensitivity and photo-controlled switching properties under light illumination.

Existing organic imaging circuits, which offer attractive benefits of light weight, low cost and flexibility, are exclusively based on phototransistor or photodiode arrays. One shortcoming of these photo-sensors is that the light signal should keep invariant throughout the whole pixel-addressing and reading process. As a feasible solution, we synthesized a new charge storage molecule and embedd...

Solar trackers represent apparatuses that may significantly improve electric power production of photovoltaic panels. For detecting solar position, the trackers use different sensors (e.g. photoresistor, photodiode receiver, phototransistor, etc..). This research proposes an alternative way, the use of the sensor par excellence for retrieving solar radiation; the pyranometer. A design and tests...

Optoelectronic tweezers (OET), based on light-induced dielectrophoresis, has been shown as a versatile tool for parallel manipulation of micro-particles and cells (P. Y. Chiou, A. T. Ohta and M. C. Wu, Nature, 2005, 436, 370-372). However, the conventional OET device cannot operate in cell culture media or other high-conductivity physiological buffers due to the limited photoconductivity of amo...