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<p>The industrial fabrication of useful, persistently luminescent paints started in the 1930s. They were used to make safety signs for places where blanking was commanded or as slowly decaying lighting during blackouts, e.g., in shelters. In this work, we investigated samples of painted plaster from a cellar room of the fortress Špilberk in Brno occupied by the Wehrmacht during World War 2. The investigation of material composition indicates the presence of the white reflecting base layer of Ba(Sr)SO<sub>4</sub> covered by the luminophore layer of ZnS:Cu. Optical properties (luminescence spectra and decay kinetics) were investigated in detail and compared with samples of similar age that remained in the university collections and with a modern material (LumiNova). The emission spectrum and visual colour of WW2 luminophore match very well with the most common green luminophore ZnS:Cu, as well as with LumiNova.</p>

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Persistently luminescent materials used by the Germans during World War 2 and related contemporary luminophores

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  • 发表日期：

    2025年6月10日

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  • Jan Valenta,
  • Stanislav Danis,
  • Anna Fucikova

摘要

The industrial fabrication of useful, persistently luminescent paints started in the 1930s. They were used to make safety signs for places where blanking was commanded or as slowly decaying lighting during blackouts, e.g., in shelters. In this work, we investigated samples of painted plaster from a cellar room of the fortress Špilberk in Brno occupied by the Wehrmacht during World War 2. The investigation of material composition indicates the presence of the white reflecting base layer of Ba(Sr)SO4 covered by the luminophore layer of ZnS:Cu. Optical properties (luminescence spectra and decay kinetics) were investigated in detail and compared with samples of similar age that remained in the university collections and with a modern material (LumiNova). The emission spectrum and visual colour of WW2 luminophore match very well with the most common green luminophore ZnS:Cu, as well as with LumiNova.