*3.3. Adherence and Durability Tests*

In order to test the adherence of the GAG structures, the scotch tape test was carried out for all the deposited samples. All the GAGs were found to withstand the scotch tape test as soon as prepared and after 500 days of exicator-free storage in paper envelopes. Long-term indoor storage at an average annual humidity and temperature of 65% and 24 ◦C, respectively, did not lead to any deterioration of the performance of our GAG samples, whereas in the bilayer GA sample, a lot of white dots and spots with fractal-like structures appeared after 45 days [49]. After this, its optical and electrical performance became unacceptable. This result reveals an additional important role of the upper GZO layer as a protective layer, blocking the damaging effects of moisture on the thin Ag layer. Thus, the trilayer GAG structures have good long-term durability and their adherence to the substrate is good.
