Klumbies H, Müller-Meskamp L, Nehm F, Leo K
Dresdener Innovationszentrum für Energieeffizienz, Institut für Angewandte Photophysik, Technische Universität Dresden, George-Bähr Straße 1, 01062 Dresden, Germany.
Rev Sci Instrum. 2014 Jan;85(1):016104. doi: 10.1063/1.4861536.
Organic devices have to be protected with a permeation barrier against ambient moisture since their performance is strongly reduced by contact with water. The corrosion of calcium is widely used to evaluate such permeation barriers. However, design details of the calcium corrosion test may have severe consequences for the validity and precision of the measurement results. In this work, we present such a measurement distortion caused by the direct contact between calcium and the inorganic permeation barrier. Fortunately, even a 20 nm thin interlayer of a soft material (i.e., C60) sandwiched between calcium and the barrier reestablishes the validity of the measurement. In addition, we present our latest and improved electrical calcium test layout used for this investigation.
由于与水接触会大幅降低其性能，有机器件必须用防潮层加以保护。钙的腐蚀被广泛用于评估此类防潮层。然而，钙腐蚀测试的设计细节可能会对测量结果的有效性和精度产生严重影响。在这项工作中，我们展示了钙与无机防潮层直接接触导致的这种测量失真。幸运的是，即使在钙和防潮层之间夹入一层20纳米厚的软材料（即C60）中间层，也能重新确立测量的有效性。此外，我们还展示了用于这项研究的最新且经过改进的钙电测试布局。
