“…In the case of the evaporated CuPc films, it should be pointed out that most authors give no particular relevance to a possible weight loss after heating at temperatures lower than 350 °C since the attention is mainly focused on the CuPc phase transformation. For this reason heat treatments are performed in nitrogen atmosphere 36,38 or in a vacuum , to prevent the effects of air or else these effects are neglected. ,, To support this belief, it must be noted that evaporated films used in these work did not undergo significant changes after heating at 250 and 290 °C in air and the decomposition of CuPc molecules with the consequent formation of CuO was not detected by XAS measurements. Moreover, thermogravimetric analyses of evaporated CuPc films showed that the 5 wt % weight loss occurred at temperatures of 416 and 423 °C in dry and humid air, respectively .…”