UV dosimeter with colour change

The invention discloses a flexible, energy-self-sufficient UV dosimeter which optically indicates the absorbed dose on the basis of the intensity and duration of the irradiation by means of a colour change. It consists of one or more UV dosimeter modules. Each UV dosimeter module comprises at least one UV-sensitive photodiode (common electrode (11), hole conductor layer (21), UV absorber layer (22), cathode 23) and an electrochromic element (common electrode (11), ion storage layer (12), electrolyte layer (13), electrochromic layer made of redox active material (14), transparent electrode 15), between which an insulator (4) and a conductor track (5) are arranged. The electrochromic element accumulates the charge generated by the UV-sensitive photodiode and indicates this by means of a colour change. The UV dosimeter can be produced as an integrated circuit using thin-film technology by successively applying and structuring organic or inorganic functional layers.