A radiation detector

A semiconductor radiation detector, comprising:

• a semiconductor block of a first conductivity type and comprising majority charge carriers of a first polarity;
• an electrode arrangement embedded on one or more surfaces of the semiconductor block, the electrode arrangement comprising at least one collector electrode embedded on a front surface of the semiconductor block and one or more further electrodes that are arranged to generate an electric field within the semiconductor block for driving charge carriers of the first polarity generated therein due to incident radiation towards the at least one collector electrode;
• a radiation entrance window for receiving the incident radiation, the radiation entrance window arranged to cover at least portion of a back surface of the semiconductor block that is opposite to its front surface;
• and
• an arrangement of one or more layers having a net charge of the first polarity, said arrangement of one or more layers arranged to substantially cover at least one side surface of the semiconductor block to induce an electric field for passivating said at least one side surface of the semiconductor block so as to reduce leakage currents arising therein.