Abstract: A radiation detector is disclosed. The detector includes a detector element; a number of electrodes arranged such that an electric field can be applied to the detector element; and a coating.

Abstract: A radiation detector is disclosed. The detector includes a detector element on which electrodes are formed. First and second electrodes are provided at a first surface of the detector element, and are arranged such that, on application of an electric field between the first and second electrodes, a first detector region is formed adjacent the first surface of the detector element. A third electrode is provided on a second surface of the detector element, and is arranged such that, on application of an electric field between the first and third electrodes, a second detection region is formed between the first and second surfaces of the detector element. The first and second detection regions are differently sized for the detection of different types of radiation. Device for detecting radiation, and handheld devices containing such device, are also disclosed.