Abstract: A process for making a solid state photoconducting detector from an organic material that has a density very close to that of normal tissue. The resulting detector senses ionizing radiation and has a tissue equivalent response to radiation. The detector's efficiency for any given radiation quality and energy can be measured and the detectors can directly measure dose equivalent. The invention also includes the device itself. The invention encompasses the use of the detector for other purposes such as a solid state photoconducting detector with organic materials unrelated to tissue equivalent properties.